Question 7 of 10
VA
In order to solve the following system of equations by addition, which of the
following could you do before adding the equations so that one variable will
be eliminated when you add them?
4x - 2y=7
3x – 3y = 15

Answers

Answer 1
the answer is Subtraction
Answer 2

Answer:

Multiply the top equation by -3 and the bottom equation by 2.


Related Questions

Simon has a farm and has to buy a certain amount of feed for each animal. He buys feed once a month and counts all of his animals to see how much feed he needs to buy. Chicken feed is about $0.5 per chicken, each horse eats about $5 worth of feed, and goats eat about $4 worth of feed. What equation should he use to find how much he should spend on feed?

A. 0.50 +5h + 4g = total spent on feed
B. 9.5a = total spent on feed
C. 0.50 +5h + 40 = 100
D. 0.59 +49 +5g = total spent on feed​

Answers

Answer:

A

Step-by-step explanation:

youre looking for the total spent, and then each variable from the word equation

Answer:It is B because you add 5+4 and you get 9 and than you have 9 you have 5 cences

so it is $9.05

The estimated world population in the year 1650 was 550,000,000. The estimated
world population in 1750 was 725,000,000. By how many people did the world's
population increase between 1650 and 1750?

Answers

Answer:

175,000,000

Step-by-step explanation:

you subtract 550,000,000 from 725,000,000

(Dont answer if you dont want alot of notifs)
If Logx (1 / 8) = - 3 / 2, then x is equal to
A. - 4
B. 4
C. 1 / 4
D. 10

Answers

Answer:

According to my problem solving, the answer should be B. 4

Step-by-step explanation: it might be wrong but worth a shot

Write an explicit formula of an , the nth term of the sequence 22,20,18

Answers

Answer:

an =24−2n

Step-by-step explanation:

What is the answer ???????????????

Answers

4(-3)-9 =-21. I hope this helpsss

Answer:

(2, - 1 )

Step-by-step explanation:

Given the 2 equations

y = 4x - 9 → (1)

y = x - 3 → (2)

Substitute y = 4x - 9 into (2)

4x - 9 = x - 3 ( subtract x from both sides )

3x - 9 = - 3 ( add 9 to both sides )

3x = 6 ( divide both sides by 3 )

x = 2

Substitute x = 2 into either of the 2 equations for y

Substituting into (2)

y = 2 - 3 = - 1

solution is (2, - 1 )

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Answers

Answer:

map

Step-by-step explanation:

Here is a rectangle ABCD.
A
B
20 cm
D
30 cm
The length of the rectangle is increased by 10%.
The width of the rectangle is increased by 5%.
Find the percentage increase in the perimeter of the rectangle.

Answers

answer

15.5%

Step-by-step explanation:

length = 30

30+10%=33

breadth=20

20+5%=21

area of rectangle = length × breadth

600² centimeters = 30 × 20

693² centimeters = 33 × 21

Increase = 15.5%

Which of these brands have the lowest cost per unit? PLEASE HELP MY FIRST MATH GRADE OF THE QUARTER IS ON THE LINE!

Answers

Answer:

you need a dotted point starting at 3 and going to to the right

Step-by-step explanation:

the dotted point means x < , x > and since it is greater you always go to the right

12foot 11incher+11foot 3 incher​

Answers

Answer:

24feet 1 inches

Step-by-step explanation:

Marissa got 60% of the questions right on her quiz out of 40 total questions.How many questions did she get worng

Answers

60% of 40 is 24 and 40-24= 16 so she got 16 wrong

Explain what opposing position means.

Answers

Answer:

to fight against, counter, or resist strongly. to be hostile or antagonistic to; be against. to place or set in opposition; contrast or counterbalance. to place opposite or facing. to be or act in opposition

Answer:

Opposition (noun) The apparent relative of 2 celestial bodies when one is at angle of 180 degrees from the other as seen from the earth

PLEASE HELPPPPP
M=2
N=16
P=1/3

Answers

Answer:

4

Step-by-step explanation:

Based on the information you have given me, p = 1/3.

All we need to do is substitute that value into the expression:

12p = 12(1/3) = 4

The answer to this question right here is 4

Solve this system of equations.
3x + 4y = 36
y=-2 +8

Answers

The answers are X=4 Y=6

Answer:

( X, y [tex] = (x.y) ( - \frac{4?}{?3} = 10)[/tex]Standard form [tex]3 \times + 4y = 36 \\ y = 10[/tex]

Please help me with the following math question:
Amelia goes to Macy’s and buys a pair of shoes. The shoes are $115.95 on sale for 30% off. What is the total she will pay with 6% sales tax included?

Answers

Answer:

$86.03

Step-by-step explanation:

30% off = 70% of total price. Add .06 to 1 for 6% sales tax.

($115.95*(.70))*1.06

= $86.03

Can someone help me with these?

Answers

Answer:

A. 4,7,3,5,6,7,8,5,8

B. 5,4,3,8,4,6,3,8,9

Step-by-step explanation:

you're just dividing

60% of Y is 75. What is Y?

Answers

y=45.5 this is because you multiply to find out how much it would be.

Below is a table of values representing a function/linear equation. What is the slope? Explain how you got it.

Answers

Answer:

-3

Step-by-step explanation:

The formula for slope is [ y2-y1/x2-x1 ].

8-14/-2-(-4)

-6/2

-3

Best of Luck!

Solve for b .

-9 b = 27
please will mark brainliest whoever gets it right

Answers

Answer:

b=-3

Step-by-step explanation:

hope this helps!

B=-3 jdjdjdjbebenejejehehd

Plz help me I need tu turn this is by midnight!!

Answers

Answer:

The last answer.

Step-by-step explanation:

It looks to be the correct answer because for the one above you can't simplify 27 by 5.

it’s the last choice, b/5 = 7

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers.
Order the polynomial -x 4 y 2 + 7x 3 y 3 - 3xy 5 + 2x 2 y 4 in descending powers of x.

Answers

Answer:

See under for the sequence

Step-by-step explanation:

The term with -X⁴ comes first because 4 is the highest power of x.

Then comes 7x³y³ because 3 is the second highest power

Then 2x²y⁴ because 2 comes next

Then -3xy⁵ because x is raised to 1 power which is the lowest

Next week the store is going to reduce the price from $42 to $31.50. Calculate what percent the sale price is of retail price.

Answers

Answer:

13.23 is 31.50 percent of 42 and the price they dropped down was $10.5

Step-by-step explanation:

hope this helps pls mark me as brainliest! :)

Answer:

10.5

Step-by-step explanation:

CUZ I NO

Please help me :))!!!! it’s pass due lolololol

Answers

y=-2x+8 is the slope

what is the answer
4⁴×4-⁶=?​

Answers

Answer:

1/16 is the answer

Step-by-step explanation:

Law of indices

Which side lengths below DO NOT produce a right triangle?
5,12,13
3,6,9
13,84,85
9,40,41

Answers

The top 2 do so it’s one of the bottom ones

a motor bike travels 240 km in 4 hours. How long will it take to travel 450 km​

Answers

Answer:

7 hours and 30 minutes

Step-by-step explanation:

[tex]240 \div 4 = 60km \: per \: h[/tex]

[tex]450 \div 60 = 7.5 = 7h \: 30min[/tex]

It will take motor bike 7.5 hours to cover 450 Km of distance.

What is Speed in Kinematics?

Speed of a body is defined as the distance travelled by it per unit time taken to cover the distance.

Mathematically-

S = Δd/Δt  or   S = {d(2) - d(1)}/{t(2) - t(1)}

It is a scalar quantity as it only has magnitude and no direction.

Given is a motor bike travels 240 km ins 4 hours.

We can calculate the speed of the bike as -

s = 240/4 = 60 Km/hr

Then, the time taken to cover 450 Km will be -

t = 450/60

t = 7.5 hours

Therefore, it will take motor bike 7.5 hours to cover 450 Km of distance.

To solve more questions on Kinematics, visit the link below-brainly.com/question/17053454

#SPJ2

Which property is shown here?
4 + (5 + 3a) = (4 + 5) + 3a
O Distributive Property
O Associative Property of Addition
O Commutative Property of Multiplication
O Commutative Property of Addition
O Associative Property of Multiplication
> Next Question

Answers

The answer is the second one
( b )
Associate property of addition

1 3/4 x 1 1/3 give your answer as a mixed number

Answers

Answer:

2 1/3

Step-by-step explanation:

1 3/4  is equivalent to 7/4

1 1/3 is equivalent to 4/3

7/ 4 x 4/3

reduce with greatest common factor so the two 4 are out (show a line crossing out the top and bottom 4 )

now you're left with 7 x 1/3 = 7/3

7/3 = 2 1/3

The product of two given mixed fractions is [tex]2\frac{1}{3}[/tex].

The given mixed fractions are [tex]1\frac{3}{4}[/tex] and [tex]1\frac{1}{3}[/tex].

What is the product of two fractions?

The product of two fractions is the product of the numerators and the product of the denominators.

Product of two fractions = Product of their denominators / Product of their numerators.

Here, the mixed fraction [tex]1\frac{3}{4}[/tex] can be written as [tex]\frac{7}{4}[/tex] and the mixed fraction [tex]1\frac{1}{3}[/tex] can be written as [tex]\frac{4}{3}[/tex].

Now, 7/4 × 4/3

= 7/3

= [tex]2\frac{1}{3}[/tex]

Therefore, the product of two given mixed fractions is [tex]2\frac{1}{3}[/tex].

To learn more about the product of two fractions visit:

https://brainly.com/question/7335118.

#SPJ2

A customer wants to purchase a sweater from a store.

The original price of the sweater is $40.

The sweater is on sale for 20% off the original price.

A sales tax of 5% is applied after the discount.

What was the final price of the sweater?

A
$34.00

B
$30.00

C
$30.40

D
$33.60

will give brainliest! hurry please!! im timed!

Answers

Answer:

a

Step-by-step explanation:

Answer:

Step-by-step explanation:

C

40*.20=8

40-8=32

32*.05=1.60

32-1.60=30.4

Plssssssssssssssssssssssssss

Answers

The answer is 9.
I hope that helps you!

Answer:

9

Step-by-step explanation:

1/9(9^2)

1/9(81)

9

Which graph shows the system 1 x++y=2 ? [x2 + y2 =9 ​

Answers

Answer:

The graph of the system in the attached figure

Step-by-step explanation:

we have

isolate the variable y

----> equation A

This is the equation of a vertical parabola open down (because the leading coefficient is negative)

The vertex represent a maximum

the vertex is the point (0,2)

---> equation B

This is the equation of a circle centered  at (0,0) with radius 3 units

The solution of the system of equations is the intersection points both graphs

using a graphing tool

The solutions are the points (-2.05,-2.19) and (2.05,-2.19)

see the attached figure

Answer:

It's C!

Step-by-step explanation:

Just got it right :>

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