Solve the simultaneous equations.
2x + y=120
x + y=70

Answers

Answer 1

Answer:

(50, 20)

Step-by-step explanation:

y = -2x + 120

x + (-2x+120) = 70

  -x = -50

x = 50

 y = -2x+120

 y = -2(50)+120 = 20

{x,y} = {50,20}  


Related Questions

Rate of change and slope. Can anybody help me? This is a major and I do not understand the problem.

Answers

Step-by-step explanation:

1. the rate of change is constant. the slope is 3

2. the rate of change is variable, because it's not consistent.

Helpppppp ill mark as brainliest!!!​

Answers

[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Surface areas and Volume.

Since Box A is cube, it's volume is Side^3

hence taking the cube root of 512 , we get as,

Side length of Box A is 8 m.

hence diving 8/2 = 4 m

4 m is a side of Box B.

hence, Volume of Box B is = (4)^3 = 64 cubic metres.

Vol. Box B = 64 m^3

Answer:

The correct answer is D: 64 meters cubed

Step-by-step explanation:

You can take any example but let's say 128 times 2 times 2 which equals box A, now you must divide all dimensions by 2 and you will get 64 times 1 times 1 which adds up to 64, this will work with any example.

Help please this problem has been bugging me

Answers

Answer:

[tex]-452 \frac{6}{7}[/tex]

Step-by-step explanation:

You just subtract the new elevation from the original, [tex]-355 \frac{2}{7} - 97 \frac{4}{7} = -452 \frac{6}{7}[/tex]

6−3+4x+1= in one solution

Answers

Answer:

4x + 4

Step-by-step explanation:

1. 6 - 3 = 3 + 1 = 4

2. You keep the 4x.

3. So 6−3+4x+1= 4x + 4.

10 points!!

Find the inverse of f(x) = √x-1

Answers

f

1
(
x
)
=
x
2
+
1
f
-
1
(
x
)
=
x
2
+
1

Answer:

Step-by-step explanation:

For a function to have an inverse, it has to pass the horizontal and vertical line test, yes both of them. This function does, so we can continue. The first step for finding an inverse is replacing f(x) with y. Then switch the places of x and y.

[tex]x=\sqrt{y-1}[/tex]

Now the next step is to solve for this new y value, which is equivalent to f^-1(x). Square both sides to get rid of the radical.

[tex]x^2=y-1[/tex]

Add 1 to both sides and that is your inverse function

[tex]y=x^2+1[/tex]

Write the first four multiples of each number.

1. 3
2. 4
3. 8
4. 15

Answers

Answer:

3, 6, 9, 12

4, 8, 12, 16

8, 16, 24, 32

15, 30, 45, 60

Step-by-step explanation:

multiply each number by itself

b-4c
B= - 3
C= 6
Help!​

Answers

Answer:

-27

Step-by-step explanation:

B - 4C

-3 - 4(6)

-3 - 24

 -27

Use the formula C= dxd
Pix diameter = Circumference
A group of students stood in a circle to play a game. The circle had a diameter of 22 meters.
Which measurement is closest to the circumference of the circle in meters?
A 34.54 m
B 1,519.76 m
C 379.94 m
D 69.08 m

Answers

Answer:

69.08m

Step-by-step explanation:

Circumference of a circle = πd where

d is the diameter of the circle

Given

diameter = 22metres

circumference of the circle = 3.14(22)

circumference of the circle  = 69.08m

Hence the circumference of the circle is 69.08m

Answer:

d i think sorry if im wronge

Step-by-step explanation:

YALL HELP ME PLEASE ITS URGENT ​

Answers

I am not sure what the answer is

help meee pleaseeeeee

Answers

Answer:

5[tex]\sqrt{7}[/tex]

Step-by-step explanation:

Answer:

No ablo inglés.......

Step-by-step explanation:

ajaja

*EXTRA PTS* find the value

Answers

Answer:
13) 4
14) 7
15) 8
How?
21x+6 = 90 by the alternate exterior angles rule so solve and get 4

11x-2=75 by the Corresponding exteriors angles rule so solve and you get 7

8x-4=60 by the vertical angle rule solve and you get 8

Hope this helps :D

Factoring.

The answer is supposed to look like this.

EXAMPLE:

5x(6x+2)(6x-2)

Answers

Step-by-step explanation:

2y×(5-4y)×(5+4y) here you go now please help me if you can

i have to find the value of x please help me will give brainliest to correct answer​

Answers

Answer:

C. x = 5

Step-by-step explanation:

48 = 7x + 13

-13           -13

35 = 7x

5 = x

Help please.
Is algebra.

Answers

Answer:

3

Step-by-step explanation:

To find the average rate of change, we can use the formula: (y2-y1) / (x2-x1).

Let (15, 45) be (x1, y1) and (29, 87) be (x2, y2).

So we have: (87-45) / (29-15)

This can be simplified to: 42/14, or 3.

Let me know if this helps!

The answer is 3 I hope this helps

Please help ASAP! :))

Answers

Answer:

yellow

Step-by-step explanation:

What 2 whole numbers is the square root of 75 between?

Answers

Answer:

8 and 9

Step-by-step explanation:

HURRY PLSS HELP!!! will give brainliest for right answer!
Drag and drop the answer into the box to identify each function as linear, exponential, or neither.

Answers

9514 1404 393

Answer:

ExponentialNeither

Step-by-step explanation:

The first function has terms with a common ratio of 1/4. It is an exponential function.

__

The terms of the second function have neither a common ratio nor a common difference. It is neither exponential nor linear.

Farmers went into debt during the 1920s, explain

Answers

Answer:

THE BEGINNING OF THE GREAT DEPRESSION

Step-by-step explanation:

Answer:   Much of the Roaring '20s was a continual cycle of debt for the American farmer, stemming from falling farm prices and the need to purchase expensive machinery. ... Simply put, if farmers produced less, the prices of their crops and livestock would increase.

Step-by-step explanation:


Please answer both

Answers

Answer:

9) 5/10

10) 4/5

Step-by-step explanation:

A terminating decimal is a decimal that stops eventually

2/3 = 0.6666666...

5/6 = 0.833333...

5/10 = 0.5

6/9 = 0.6666666...

5/10 has a result of a terminating decimal

8/9 = 0.888888...

1/7 = 0.142857...

4/5 = 0.8

4/11 = 0.36363636....

What line passes through (4,-5) ; m=6

Answers

Answer:

I cant tell you the answer but think of this formula.

Step-by-step explanation:

Denise would like to purchase a computer that cost 2,000 dollars. create and solve an inequality in order to determine the least amount of hours she must work in order to able to purchase the computer.

Answers

Answer:

I don and the answer of the answer of the answer of the questions that I was going to get it done by hdhdhrhdnsjrhr

Pls help will mark brainiest

Answers

Answer:

35x 10000500

Step-by-step explanation:

35 divided by 7 is 5. 3,500 is 35 x 100. 35 hundreds (3,500) divided by 7 is 5 hundred (5 with 00 at the end). 3,500 divided by 7 is 500.

Hope it helps!

Use a rectangular array to write the product in Standard form 2(x+10=?​

Answers

Hello there!

I hope you and your family are staying safe and healthy during this winter season!

See the attached picture for the answer!

Thanks!

~Garebear

Hey there!

2(x + 10)

REMEMBER A VARIABLE BY ITSELF IS UNDERSTOOD AS AN INVISIBLE 1

= 2(1x + 10)

DISTRIBUTE “2” WITHIN PARENTHESES

= 2(1x) + 2(10)

= 2x + 20

Therefore, your answer should be: 2x + 20

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

What is the median of 9, 7, 3, 9, 7

Answers

Answer:

7 is the median

Brain Teaser
> Solve this riddle.
I am an even factor of 24.
I have only 2 factors.
Which number am I?

Answers

Answer:

You're the number 2.

Step-by-step explanation:

2 is even, is a factor of 25, and only has the factors 1 and 2.

Answer:

Its 2.!!!

Well no need for step- by- step explanation cuz only two has 2 factors. LOL!!

Hope it helped!!!

What is an equation of the line that passes through the points -6, -2 and 6,-2

Answers

Answer:

y = 2

Step-by-step explanation:

m = (2 - 2)/(6 - (-6))

m = 0

there's no slope, so it's just 2

As you can see the 2 points have the same y coordinate that means the line passing through it is going to be a horizontal line with a consistent y level of -2.

The equation will be just what I said y=2

Hope this helped!

What's the additive inverse of 0.75.

Answers

Answer:

[tex]additive \: inverse = - 0.75[/tex]

Phyllis invested $13,000, a portion earning a simple interest rate of 5¼% per year and the rest earning a rate of 5% per year. After one year the total interest earned on these investments was $672.50. How much money did she invest at each rate?

Answers

Answer:

Phyllis invested $9000 at the rate of 5.25% and $4000 at the rate of 5%.

Step-by-step explanation:

Formula for the simple interest is,

Interest = [tex]\frac{P\times r\times t}{100}[/tex]

Here, P = Principal amount

r = rate of interest  

t = Duration of investment

Let Phyllis invested amount (at 5.25% rate of interest) = $x

Therefore, Interest on this amount,

Interest = [tex]\frac{5.25\times x}{100}[/tex]

             = $0.0525x

If he invested the rest amount $(13000 - x) at the rate of 5%,

Interest earned on this amount = [tex]\frac{(13000-x)\times 5\times 1}{100}[/tex]

                                                    = $(650 - 0.05x)

Interest earned on total amount = $672

Therefore, $0.0525x + $(650 - 0.05x) = $672.5

0.0025x + 650 = 672.5

0.0025x = 22.5

x = $9000

Rest amount = 13000 - 9000

                     = $4000

Phyllis invested $9000 at the rate of 5.25% and $4000 at the rate of 5%.

Solve for the inequality x / 3 < -7​

Answers

Answer:

[tex]x < - 21[/tex]

Step-by-step explanation:

1. Multiply both sides by 3.

[tex]x < - 7 \times 3[/tex]

2. Simplify 3 × 7 to 21.

[tex]x < - 21[/tex]

therefor, the answer is x < -21

HELP ASAP PLEASE!!!!!

Answers

35) 48 cents each!
36) 297 miles a day!

35. $0.48

2.88/6 = 0.48

36. 297 miles

1188/4 = 297

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