Answer:
Distance = Rate x Time
Step-by-step explanation:
You can use the equivalent formula d = rt which means distance equals rate times time. distance = rate x time. To solve for speed or rate use the formula for speed, s = d/t which means speed equals distance divided by time. speed = distance/time.
What is the net force for this free body diagram below?
pretty please help.
What is the area of the of the object above ?
A. 98 sq cm
B. 54 sq cm
C. 104 sq cm
D. 90 sq cm
Answer:
the answer is d
Step-by-step explanation:
basically dived that shape to 2 peices.
the big rectangle: 12 x 7 = 84
the small rectangle: 2 x 3 = 6
then add these 2 areas together to get the area of the object: 84 + 6 = 90
therfore, teh area of the object is 90 sq cm
mark brainliest plz :P
Put the following portions in order from least to greatest 30% 1/5 75% 5/6
Answer:
1/5,30%,75%,5/6
Step-by-step explanation:
first turn all of them in to decimals:
1/5=0.20
30%=0.30
75%=0.75
5/6=0.83
then put the decimals in order from least to greatest
done!
find the product of (5t-3) and (3t +7) when t = 6
Answer:
675
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
(5t - 3) · (3t + 7)
t = 6
Step 2: Evaluate
Substitute in t: (5(6) - 3) · (3(6) + 7)(Parenthesis) Multiply: (30 - 3) · (18 + 7)(Parenthesis) Subtract: 27 · (18 + 7)(Parenthesis) Add: 27 · 25Multiply: 675Answer:
(5t -3)(3t+7) (im multiplying them together, if that's not what the questions asking lmk. but anyway, put them next to eachother and then plug in 6 for t)
(5(6) -3)(3(6)+7) (multiply where possible)
(30 -3)(18+7) (use the distributive property/foil to multiply the two)
540 +210 -54 -21 (add the positive numbers and subtract the negative )
750 - 75 (subtract)
675 (the answer)
Step-by-step explanation:
I hope this helps :)
Between what integers is number 4.6?
Between what integers is number -2 1/3?
Answers please
Answer:
4.6 is between 4 and 5
-2 1/3 is between -2 and -3
Step-by-step explanation:
That is the numbers around them in a number line
The ratio of boys to girls in a class is 5:7.
There are 36 students in the class.
How many more
girls than boys are there?
Answer:
6 more girls than boys
Step-by-step explanation:
7+5=12
36 divided by 12 = 3
3x7=21
3x5=15
Can you help me with this question?
All of the following expressions are equivalent, except ______.
x - 7
7 + (-x)
-x + 7
7 - x
Answer:
x - 7
Step-by-step explanation:
Let's let x = 4 and see which one would be different
x - 7 = 4 - 7 = -3
7 + (-x) = 7 + -4 = 3
-x + 7 = -4 + 7 = 3
7 - x = 7 - 4 =3
As you can see, the top answer would be negative while all the rest are positive. This is because, in that case, the negative sign was attached to the 7 instead of the x.
Answer:
x - 7
Step-by-step explanation:
The figure below is made up of two rectangular prisms.
3 m
7 m
10 m
4 m 1 m
Find the volume of the entire figure by adding the volumes of the separate figures.
Volume = 120 +
cubic meters
Answer:
Total Volume = 190 m³Step-by-step explanation:
Volume of the entire figure = L (Area 1 + Area 2)
where L = 10 m
Area 1 (blue prism) = 4 x 3 = 12 m²
Area 2 (brown prism = 1 x 7 = 7 m²
plugin values into the formula:
Volume of the entire figure = L (Area 1 + Area 2)
= 10 (12 + 7)
= 120 m³ + 70 m³
= 190 m³
Find the circumference and area of each circle. Use your calculator's value of t. Round your answer to the nearest tenth. Circumference 9m
Answer: Duno
Step-by-step explanation:
For a certain recipe, Ben takes a 5 1/2 -cup sack of sugar and uses all but 1 3/4 cups.
Which of these also describes the amount of sugar used in Ben's recipe?
I need the answer ASAP
Answer:
swedwedvads
Step-by-step explanation:
evEVevwq
Identify all the corresponding angles below. Select all that apply.
Answer:
A,B,D,E
Step-by-step explanation:
hope u get to right
61% of x algebraic expressions
explain more for me to understand better pls
Answer:
[tex]61\% = \frac{61}{1 00 } \:→fractional \: expression \\ 61\% = 0.61 \: → decimal \: expression[/tex]
Point T is the midpoint of A B If TB = 6, find the length of AB.
Answer:
12
Step-by-step explanation:
TB= TA
6= TA
TA+TB= AB
6+6=12
Rewrite in simplest terms: -0.2t - 5 (-8t + 5)
Answer: 40.2t - 25
Step-by-step explanation:
-0.2t - 5 (-8t + 5)
-0.2t + 40t -25
39.8t - 25
a music store sells a used guitar for $120. This is $25 more than 1/2 the cost of a new guitar of the same brand. what is the cost of a new guitar?
Answer:
$190.
Step-by-step explanation:
We can write the equation 120=25+1/2n where n is the cost of a new guitar. First, we subtract 25 from both sides to get 95=1/2n. Then, we multiply both sides by 2 to get 190=n. Therefore, the cost of a new guitar is $190.
If a line bisects DF at E with the coordinates D (5.-10) and F(-1,0), what are the coordinates
of the midpoint, E?
[A] (-3,5)
[B] (2,-5)
[C] (3.-5)
[D] (4,-10)
[E] (6-10)
((3+2)^2+2)-2^2=
A. 40
B. 23
C. 24
D. 50
Answer:
23
Step-by-step explanation:
((3+2)^2+2)-2^2
5^2
25+2=27-4=23
as an estimation we are told £3 is €4. Convert €52 to pounds.
Answer:
its £39
Step-by-step explanation:
The amount people who pay for cell phone service varies quite a bit, but the mean
monthly fee is $55 and the standard deviation is $22. The distribution is not Normal.
Many people pay about $30 for plans with 2GB data access and about $60 for 5GB
of data access, but some pay much more for unlimited data access. A sample survey
is designed to ask a simple random sample of 1,000 cell phone users how much they
pay. Let x be the mean amount paid.
Part A: What are the mean and standard deviation of the sample distribution of X?
Show your work and justify your reasoning. (4 points)
Part B: What is the shape of the sampling distribution of x? Justify your answer. (2
points)
Part C: What is the probability that the average cell phone service paid by the
sample of cell phone users will exceed $56? Show your work. (4 points) (10 points)
INTL
Answer:
a) The mean is $55 and the standard deviation is $0.6957
b) The shape of the sampling distribution of x is approximately normal.
c) 0.0749 = 7.49% probability that the average cell phone service paid by the sample of cell phone users will exceed $56.
Step-by-step explanation:
Normal probability distribution
When the distribution is normal, we use the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex]
In this question:
Mean of the distribution: 55
Standard deviation of the distribution: 22
Sample of 1000.
This means that:
[tex]\mu = 55, \sigma = 22, n = 1000[/tex]
Part A: What are the mean and standard deviation of the sample distribution of X?
By the Central Limit Theorem, the mean is 55 and the standard deviation is [tex]s = \frac{22}{\sqrt{1000}} = 0.6957[/tex].
Part B: What is the shape of the sampling distribution of x?
By the Central Limit Theorem, the shape of the sampling distribution of x is approximately normal.
Part C: What is the probability that the average cell phone service paid by the sample of cell phone users will exceed $56?
This is 1 subtracted by the pvalue of Z when [tex]X = 56[/tex]. So:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{56 - 55}{0.6957}[/tex]
[tex]Z = 1.44[/tex]
[tex]Z = 1.44[/tex] has a pvalue of 0.9251
1 - 0.9251 = 0.0749
0.0749 = 7.49% probability that the average cell phone service paid by the sample of cell phone users will exceed $56.
Which best describes the figure that is represented by the following coordinates
A(—3,4) B (3, 4) C (3, —2) and D (—3 —2)
Answer: Rectangle
Reasoning: 4 straight sides, 2 pairs of sides of equal length.
After dinner 2/3 of a pan of lasagna is left. The whole pan of lasagna was originally cut into pieces 1/6 of the pan. Which equation represents the number of pieces of lasagna that are left after dinner
Answer:
There are 4 pieces of lasagna left
While Jackie was in Hawaii, she would dive for shells. One afternoon she dove −7.8 feet. Her next two dives were each 2 1/8 feet deeper than the dive before it. What were the depths of her second and third dives?
Dive 2: ? ft
Dive 3: ? ft
Answer:
Dive 2: -9 37/40 feet
Dive 3: -12 1/20 feet
Step-by-step explanation:
To solve this, we subtract 2 1/8 from -7.8 twice. First, convert -7.8 to a mixed number, that gets us -7 8/10. Now, we find the LCM of 8 and 10. That is 40. Now, we multiply 1/8 by 5/5 to get 5/40. Now, we multiply 8/10 by 4/4 to get 32/40. Now, we subtract 2 5/40 from -7 32/40. This gets us -9 37/40. That means Dive 2 was -9 37/40 feet. Now, we subtract 2 5/40 from -9 37/40. That gets us -12 2/40. We can simplify that to -12 1/20. That means Dive 3 was -12 1/20 feet.
what is an absolute value
Answer:
the magnitude of a real number without regard to its sign
Step-by-step explanation:
An example would be :
-16 =[16]
Please help I’ll mark you as brainliest if correct!!
Answer:
2 handshakes
Step-by-step explanation:
10 divided by 5 is 2
I need help ASAP, marking brainliest!
work out the equation of the line which passes through the point (-1,2) and is parallel to the line y=x+4
Answer:
Y=x+3
Step-by-step explanation:
Substitute c=3 and m=1 in eqn 1
y=1x+3
y=x+3
Thus the required equation of the line is found
Tanya earns $12.25 per hour shoveling snow. Which of these represents how much she earns for 3 hours of shoveling?
Answer:
$36.75
Step-by-step explanation:
12.25×3=36.75
12.25 per hour to find 3 hours you multiply by 3 which is 36.75
Three small squares are drawn inside a larger square as shown. What is the length of the line marked with a question mark?
Answer:
19
Step-by-step explanation:
let the smallest square be A, medium square is B and the largest is C ;
as the length side of the main square is 28, we can find that,
A= 28-22 = 6
C= 28-15 = 13
So to find B,
A+B+C = 28
B = 28-A-C
B = 28-6-13 = 9
So the line with questioned mark is,
28-9 = 19
An amusement park charges $5 for admission and $.80 for each ride. You go to the park with $13. Which inequality represents this situation
Answer:
Answer Placeholder (I'm going to solve it and answer when I'm done)
Step-by-step explanation: