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abruzzese [7]
3 years ago
15

Use elimination to solve the system of equations. 2X - 3Y = 9 -5X - 3Y = 30

Mathematics
1 answer:
shtirl [24]3 years ago
6 0

Answer:

X = -3

Y = -5

Step-by-step explanation:

    2X - 3Y = 9

<u>- (-5X - 3Y) = 30</u>

    7X + 0Y = -21

               X = -3

2(-3) - 3Y = 9  

        - 3Y = 15

            Y = -5

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astraxan [27]
3 + p = 8

Subtract 3 on both sides

3 + p - 3 = 8 - 3

Simplify both sides

p = 5

\boxed{\huge{\sf{p=5}}}
4 0
3 years ago
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You construct a budget to determine how much money you will need to start your own catering business. You take your savings of $
tatiyna

Answer:

Compound interest is the best.

Step-by-step explanation:

Simple interest is that which is not added to the initial capital once the term of the investment or credit has expired.

Compound interest is that which is added to the initial capital at the end of the investment or credit.

Simple interest:

I= C x i x t

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Cf= Ci (1+i)ᵗ

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8 0
3 years ago
How do I solve #7? do i add all the angles together like a normal triangle and make it equal to 180?
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Answer:

126 degrees

Step-by-step explanation:

Triangle: y = 180 - (5x + 4x)

Straight angle: y = 180 - (4x + 30)

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7 0
2 years ago
In a poll, 74% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted o
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Answer:

324

Step-by-step explanation:

given that in a poll, 74% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?"

i.e. Sample proportion p=0.74\\q =1-p =0.26\\

Margin of error = 4% = 0.04

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Z critical value for 90% = 1.645

Margin of error = 1.645 * std error

Hence std error = \frac{0.04}{1.645} \\=0.0243

Std error is also equal to

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Sample size should be 324.

The formula is sample size = (Z critical value)^2 (pq)/(Margin of error )^2

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3 years ago
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The chart below shows Mrs. Thompson's grocery bill. What is the average amount Mrs. Thompson spent on groceries?

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