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3 years ago

Solve each system by substitution. 1) -3x + y=-13 3x + 4y = 8

Mathematics

1 answer:

erica [24]3 years ago

6 0

Answer:

x= 4 y= -1

Step-by-step explanation:

if you multiply -3 by 4 it equals -12 then add -1 to get - 13 for the first equation.

for the second equation you multiply 3 by 4 to get 12 and multiply 4 by -1 to get -4 then you add them together to get 8. start with a process of elimination by substituting each eqation with 0.

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Dominik [7]

Answer:

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Step-by-step explanation:

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3 years ago

Adam eats 20 % of a pizza, Bethany eats another 1/3 of the pizza, and Charlie eats the remaining 14 slices. How many slices tota

Firdavs [7]

The pizza originally have 30 slices.

What is linear equation?

An equation in which the highest power of the variable is one is known as linear equation.

We will find number of pizza slices as shown below:

Let pizza originally have x slices.

Adam eats 20% of a pizza

= 0.2x

Bethany eats 1/3 of pizza

=1/3(x)

Charlie eats the remaining 14 slices

0.2x+1/3(x)+14=x

14 = x - 0.2x - 1/3(x)

14 = x - x/5 - x/3

14 = (15x - 3x - 5x)/15

14*15 = 7x

By dividing both sides by 7, we get

30 = x

x = 30

Hence, the pizza originally have 30 slices.

Learn more about linear equations here:

brainly.com/question/14323743

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3 0

2 years ago

The APR of Burt's savings account is 2.5%, but interest is compounded only

ludmilkaskok [199]

Annual Percentage Yield (APY) of Burt's savings account is 2.5%

Step-by-step explanation:

Annual percentage rate refers to the annual percentage return of the saving account held by Burt's. The interest rate is compounded annually. Hence, the interest is added annually to the account.

Annual Percentage yield refers to the real rate of return that is earned on the savings. This interest is accrued in compounding fashion. Higher the interest rate more is the amount returned.

Hence, the Annual Yield of the Burt's savings account is 2.5%

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3 years ago

Ind the distance between the two points. Round to the nearest tenth if necessary. (9, 12), (–2, 7)

marin [14]

Answer:

(11,5)

Step-by-step explanation:

(-2,7)

11+ +5

(9,12)

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3 years ago

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Nostrana [21]

Answer:

I can't find the answer for the last one, but here it is

Step-by-step explanation:

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3 years ago