Answer:
19.75.
Expression: 4.50pp - 2.75
(pp is the variable, pretend)
19 POINTS evaluate the expression 2n, if n = 4
ANWSER:
o 8
o 6
o 24
o 2
Answer:
8
Step-by-step explanation:
2n
Let n =4
2*4
8
Answer:
8
Step-by-step explanation:
= 2 * 4 (we know that n = 4)
= 8
Hope this helps!
Given that Triangle ABC such that
a=8cm, b=7cm and c=9cm
tem and c= 9cm find Cos B
Answer:
We use cosine rule also called cosine law which states
c^2=a^2+b^2-2abcosC
given
a=8cm, b=7cm, c=9cm cos C?
9^2=8^+7^2-2*8*7 cos C
expand
81=64+49-112 cos C
like terms together
81-113=-112 cos C
-32=-112cos C
multiply both sides by -1
32=112cos C
divide both sides by 112
32/112=cos C
cosC=0.2857
find cos inverse of 0.2857
angle C= 73.40
Part 3. Find the measure of the indicated angle to the nearest degree.
Answer:
hope this helps you
Please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!
Answer:
(x-5)
Step-by-step explanation:
x^2 -25
We know this is the difference of square
(x-5)(x+5)
Since the length is (x+5) the width must be (x-5)
Given:
Area = x² - 25Length = x + 5To be calculated:
Calculate the width of rectangle?
Formula used:
Area of Rectangle = L × b
Solution:
We know,
Area of Rectangle = L × b
⇒ x² - 25 = x + 5 × b
⇒ b = x² - 25 / x + 5
⇒ b = x² - 5² / x + 5
⇒ b = ( x + 5 ) ( x - 5 ) / x + 5
⇒ b = x - 5
what is 40.8 ÷ 6? Please explain how you got your answer
Answer:
6.8
How many 6's can go into 40?
6 + 6 + 6 + 6 + 6 + 6 = 36
6 6's
Subtract the amount off
40.8-36=4.8
How many 6's can go into 4.8?
0.6 + 0.6 +0. 6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 = 48
0.8 6's
4.8 = 4.8 = 0
6 6's + 0.8 6's = 6.8 6's
6.8 is the answer
If you have any questions you can ask
Step-by-step explanation:
Simplify the expression by combining like terms.
22+5−4+7−8
Answer: 22
Step-by-step explanation:
22+5= 27
27-4=23
23+7=30
30-8=22
Answer:
22+m+ 7n - 8
Step-by-step explanation:
22+5m-4m+7n-8
22+m+ 7n - 8
you subract 4m from 5m because there are like terms
none of the others are like terms so you cant add or subract them
Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match the verbal descriptions with the correct equations.
Answer:
Step-by-step explanation:
6 more than a number is 36: x+6=36
36 more than a number is 6: x+36=6
6 times a number is 36: 6x=36
Five times one number minus two times a second number is 11. Three times the first number minus two times the second number is 1. what are the numbers?
Answer:
first number is 5
second number is 7
Step-by-step explanation:
let x and y represent the first and second number
5x - 2y = 11 ........ equation 1
3x - 2y = 11.......... equation 2
so by elimination, equation 1 minus equation 2
5x - 3x - 2y - 2y = 11 - 1
2x = 10
x = 5
therefore the first number is 5
put x = 5 into equation 1
5x - 2y = 11
5(5) - 2y = 11
25 - 2y = 11
-2y = 11 - 25
-2y = - 14
y = 7
therefore the second number is 7
hope it helps .
Which point represents the vertex of the marked angle?
Can you explain the example 4 pls
Answer:
x = -3/4
Step-by-step explanation:
15/4 - 7x = 9
When solving these types of equations, you want to isolate the variable
Subtract 15/4 from both sides to get
-7x = 21/4
Divide both sides by -7 to get
x = -3/4
Answer:
x = -3/4
Step-by-step explanation:
The outside temperature at a place is - 20 degree Celsius and it drops 5 degrees every hour.How long it will take to reach the temperature zero degree Celsius?
Answer:
4 hours
Step-by-step explanation:
20-5x=0
5x= 20
x=4 hours
Of the 100 students in the science club, 65 take mathematics, 43 take physics and 10 students take both mathematics and physics. How many science club students take neither mathematics nor physics? URGENT!
Answer:
2
Step-by-step explanation:
Add the students that take math and physics and subtract the ones that take both so that they are not double counted
65+43-10 =98
There are 100 students
100-98 =2
There are 2 that take neither math nor physics
how does the graph y=-6x^2 -4 different from y=-6^2
Answer: [tex]y=-6x^2[/tex] never touches the y-axis
[tex]y=-6x^2-4[/tex] touches the y-axis at -4
Step-by-step explanation:
Because -4 means that the graph touches the y-axis at negative 4, not having it means that it never touches the y-axis
Justin Lowery is buying a condominium that sells for $ 120 comma 000. The bank is requiring a minimum down payment of 10%. To obtain a 20-year mortgage at 8.5% interest, Justin must pay 1 point(s) at the time of closing. What is the cost of the 1 point(s) on the mortgage?
Answer:
$10.25
Step-by-step explanation:
95/.1=9.5
9.5*9=85.5
85.5/8
=10.25
AEFG is located at E (0,0), F (-7, 4), and G (0,8). Which statement correctly classifies AEFG?
AEFG is a scalene triangle.
AEFG is an isosceles triangle.
AEFG is an equilateral triangle.
AEFG is a right triangle.
Answer:
ΔEFG is an isosceles triangle
Step-by-step explanation:
write down in terms of n, an expression for the nth term of the following sequences 2 5 8 11 14
Answer:
[tex]a_{n}[/tex] = 3n - 1
Step-by-step explanation:
There is a common difference d between consecutive terms, that is
d = 5 - 2 = 8 - 5 = 11 - 8 = 14 - 11 = 3
This indicates the sequence is arithmetic with n th term
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 2 and d = 3 , thus
[tex]a_{n}[/tex] = 2 + 3(n - 1) = 2 + 3n - 3 = 3n - 1
The expression for the nth term of the series is [tex]a_n = 3n-1[/tex].
Given that,
Sequence; 2, 5, 8, 11, 14.
We have to find, the expression in terms of n for the nth term of the following given sequences?
According to the question,
The nth of the arithmetic sequence is,
[tex]\rm a_n = a+ d(n-1)[/tex]
Where a is the first term of the sequence,
d is the common difference between the terms,
n is the number of terms.
Then,
The given sequence is 2, 5, 8, 11, 14.
Here, the common difference between the terms is 3.
And the first term of the sequence is 2.
Substitute all the values in the formula,
Therefore,
The nth term of the given terms is,
[tex]\rm a_n = a+ d(n-1)\\\\a_n = 2+ 3(n-1)\\\\a_n + 2+3n-1\\\\a_n = 3n-1[/tex]
Hence, The required expression for the nth term of the series is [tex]a_n = 3n-1[/tex].
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Expand and simplify . 7x(5y-8)+3y(12x+9) PLEASE HELP. BEST ANSWER RECIEVES A BRIANLIEST
[tex]answer \\ 71xy - 56x + 27y \\ solution \\ 7x(5y - 8) + 3y(12x + 9) \\ = 35xy - 56x + 36xy + 27y \\ combine \: like \: terms \\ = 35xy + 36xy - 56x + 27y \\ = 71xy - 56x + 27y \\ hope \: it \: helps[/tex]
Answer:
[tex] = 71xy - 56x + 27 \\ [/tex]
Step-by-step explanation:
[tex]7x(5y - 8 )+ 3y(12x + 9) \\ 35xy - 56x + 36xy + 27 \\ 35xy + 36xy - 56x + 27 \\ = 71xy - 56x + 27[/tex]
hope this helps
P= $450 r=6% t= 3 what is I ?
Answer:
535.96 (rounded up)
Step-by-step explanation:
Y= a ( 1 + r )^t
What is: 6x^2-4x-10?
[tex]answer \\ (3x - 5)(2x + 2) \\ solution \\ {6x}^{2} - 4x - 10 \\ = {6x}^{2} - (10 - 6)x - 10 \\ = {6x}^{2} - 10x + 6x - 10 \\ = 2x(3x - 5) + 2(3x - 5) \\ = (3x - 5)(2x + 2) \\ hope \: it \: helps[/tex]
Answer:
x = 1⅔ or -1
Step-by-step explanation:
6x² -4x - 10
a=6, b=-4, c=-10, ac= -60
factors -10 & 6
6x² + 6x - 10x -10 =0
(6x² + 6x) - (10x - 10) =0
6x(x +1) - 10(x+1) =0
(6x-10)(x+1)=0
6x-10=0 or. x+1=0
6x= 10 or x= -1
x= 10/6 or. x= -1
x=1⅔ or x= -1
Find the gradient of the line segment between the points (0,2) and (2,-8).
Answer:
slope = - 5
Step-by-step explanation:
Calculate the slope m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (0, 2) and (x₂, y₂ ) = (2, - 8)
m = [tex]\frac{-8-2}{2-0}[/tex] = [tex]\frac{-10}{2}[/tex] = - 5
The value of the gradient is -1/5.
How to find the gradient of a line?In order to find the gradient of a line either of the two ways can be used. First, the equation of line should be written in terms of y, then the coefficient of x is the gradient.
The other method is to find the two points on the graph and then take the ratio of the difference of corresponding coordinates.
The given points are (0,2) and (2,-8).
Since the gradient of the line segment between points (x₁, y₁) and (x₂, y₂) is given as,
Gradient = (y₂-y₁)/(x₂-x₁)
Substitute the corresponding values to obtain,
Gradient = (2-0)/(-8-2)
= -2/10
= -1/5
Hence, the gradient of the line segment joining the points (0,2) and (2,-8) is -1/5.
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I can’t tell if my answer is correct , please help !!!!!! Will mark brainliest !!!!!!!!!!!!
Answer:
You should be right
Step-by-step explanation:
Srry if I am wrong though
Mark asked each student in a class to name their favourite colour. For this class, the number of students who said blue is three times the number of students who said green. Write down the ratio of the number of students who said blue to the number of students who said green.
Answer:
3:1
Step-by-step explanation:
Since there are 3 times more blue favorite kids, the ratio is
3:1
The ratio of the number of students who said blue to the number of students who said green is 3 : 1.
What is ratio?The ratio is a numerical relationship between two values that demonstrates how frequently one value contains or is contained within another.
Given:
Mark asked each student in a class to name their favorite color.
For this class,
the number of students who said blue is three times the number of students who said green.
Let n be the number of students who said green.
Then, 3n, the number of students who said blue.
The ratio of the number of students who said blue to the number of students who said green.
= 3n/ n
= 3/1
= 3: 1.
Therefore, the ratio is 3 : 1.
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Factorize the following expression ab-a-b+1
Group 'em together
a b − a + 1 − b
a b − a = a ( b − 1 )
Notice that there will be a 1 as without it it'll simply be ab
1 − b = 1 ( 1 − b )
Notice that it doesn't match with the upper one... so we'll change the signs
1 ( 1 − b ) = − 1 ( b− 1 )
(try to multiply them now!!
Jot them down in one expression
a ( b − 1 ) − 1 ( b − 1 )
You get!!!!!!
( a − 1 ) ( b − 1 )
PLEASESS HELPPP
Determine where f(x) = g(x) from the graph
A. X=-2; x=2
B. X=0 ; x=-8
C. X=0 ; x=2
D. X=-2; x=0; x=2
Answer:
The answer is D.
Step-by-step explanation:
Given that f(x) = g(x) which means that both functions intersect to each other. By looking at the graph, x = -2 or 0 or 2 are the places where they intersect.
a graph using y=mx+b
Answer:
A graph using y=mx+b would include a positive or negative line (slope) and a y-intercept. If there is a y-intercept between 1 & infinity then the line will not start on the origin. y=mx+b doesnt have to include a y-intercept though. It can include a y-intecept of 0. This would mean that the line would start on the origin. y=mx+b will ALWAYS be a straight line.
Step-by-step explanation:
Hope this helps :)
41 points. What is the range of this data set? 2.1, 2.6, 7.2, 5.5, 4.1, 5.5, 7.5, 6.1 A. 5.1 B. 5.5 C. 5.4 D. 7.5
Answer:
C. 5.4
Step-by-step explanation:
Range means highest number minus lowest number.
7.5 - 2.1 = 5.4
[tex]answer =5.4 \\ given \: data = 2.1 , 2.6 , 7.2 , 5.5 ,4.1 , 5.5 ,7.5 , 6.1 \\ range = highest \: score - lowest \: score \\ \: \: \: \: \: \: \: \: = \: 7.5 - 2.1 \\ \: \: \: \: \: = 5.4 \\ hope \: it \: helps \\ good \: luck \: on \: your \: assignment[/tex]
1. An arch in the shape of a semicircle is to be set up at the entrance of a festival.
The distance around the arch is about 110 feet. What is the height of the arch, in
feet? Round your answer to the nearest whole number.
Answer:
35 ft
Step-by-step explanation:
The arch is in the shape of a semicircle.
The distance around the arch is about 110 feet. This is the same as the circumference of the arch.
The height of the arch is the radius of the arch.
The circumference of a semicircle is given as:
[tex]C = \pi r[/tex]
where r = radius
Therefore:
110 = πr
=> r = 110/π
r = 35.01 ft ≅ 35 ft
The height of the arch is 35 ft
The height of the arch in feet is 35 ft.
Calculation of the height:Since The distance around the arch is about 110 feet.
We know that
The circumference of a semicircle should be
110 = πr
[tex]r = 110/\pi[/tex]
r = 35.01 ft
≅ 35 ft
hence, we can conclude that The height of the arch in feet is 35 ft.
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Solve the equation.
y + 6 = –3y + 26
Answer: y=5
Step-by-step explanation:
Answer:
y=5
Step-by-step explanation:
y+6=-3y+26
Taking like terms to both side, y+3y=26-6
4y=20(Dividing both sides by 4)
y=5
A 200 pound person weighs 33 pounds on the moon. Type the answers in the boxes below. 1. How much did the person's weight decrease?By what percentage did the person's weight decrease? Round the answer to the nearest percent.
Answer:
83.5%
Step-by-step explanation:
200-33= 167
167/200=x/100
167/2= 83.5
about 83.5%
Plss brainliest
The total weight of the person decrease is 167 pounds and the percentage by which person's weight decrease is 84%.
What is percentage decrease?Percentage decrease is the value which is deducted or reduced from the initial value in the percentage part.
The weight of the person is 200 pound. The person's weighs on the moon is 33.
The person's weight decrease-The change in the weight of the person is the difference of weight of the person and weight of the person on moon. Thus the change in weight of the person is,
[tex]\Delta W=200-33\\\Delta W=167[/tex]
The percentage did the person's weight decrease-The change in person's weight is 167 pounds and the original weight of the person is 200 pounds. Thus the percentage change is,
[tex]\Delta W=\dfrac{167}{200}\times100\\\Delta W=83.5\%\\\Delta W\approx84\%[/tex]
Thus, the total weight of the person decrease is 167 pounds and the percentage by which person's weight decrease is 84%.
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Which is the best reason why 2/5 is the exact quotient for 1/4÷ 5/8 ?
Answer:
2/5.
Step-by-step explanation:
1/4 / 5/8
= 1/4 * 8/5
= 1*8 / 4*5
= 8/20
= 2/5.