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3 years ago

Explain answer ! Will give brainlst

Mathematics

1 answer:

Ne4ueva [31]3 years ago

5 0

Answer:

x = 4, y = 2

Step-by-step explanation:

Start by multiplying the first equation by 2:

2x + 2y = 12 --> 4x + 4y = 24

Subtract the second from the first:

4x + 4y = 24

- 5x + 4y = 28

4x - 5x = -x

4y = 4y = 0

24 - 28 = -4

so you end with -x + 0 = -4

Solve for x to get x = 4

Plug x = 4 back into 2x + 2y = 12 to find y.

2(4) + 2y = 12

8 + 2y = 12

2y = 4

y = 2

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hammer [34]

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4 years ago

The ratio of the measures of the three angles in a triangle is 14:5:11. Find the value of x

Lilit [14]

Answer:

The three angles are 84º, 30º, and 66º. You multiply the ratio 14:5:11 by 6º.

Step-by-step explanation:

The sum of a triangle's interior angles is 180º. From the information we know:

14xº+5xº+11xº=180º
Combine like terms, 30xº=180º
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Now we can say that the three angles are 14(6)=84º, 5(6)=30º, 11(6)=66º.

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3 years ago

The perimeter of a rectangle is 80 cm. The width is 10 cm more than twice the length. What

sashaice [31]

Answer:

L=10cm , W=30cm

Step-by-step explanation:

First use the given that W=10+2*L

Use P=2W+2L=80, substitute W in the perimeter formula

2(10+2L)+2L=80 and solve for L,

20+4L+2L=80 isolate variable L and combine like terms,

6L=80-20,

L=10, so W=10+2*10=10+20=30

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3 years ago

11. You expect to have the given amount in an account with the given terms. Find how much you can withdraw periodically in order

Orlov [11]

This is a question on Present Value of Annuity and we seek the periodic withdrawal.

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where:

FVA = Future value of annuity

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i = interest/discount rate

n = no of years

m = no of compundings per interest period

$\text{PMT=}\frac{300000}{(\frac{(1+\frac{0.0445}{365})^{22\times365}-1}{\frac{0.0445}{365}})}=22.01$

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1 year ago

Graph the linear equation.find three points that solve the equation,then plot on the graph -3x++2y=11

Katarina [22]

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4 years ago