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nikitadnepr [17]
3 years ago
15

SOMEONE PLEASE HELP ASAP!!!!!

Mathematics
1 answer:
Margaret [11]3 years ago
7 0

Answer:

<em>x = 1</em>

<em>y = 1</em>

Step-by-step explanation:

<u>System of Equations</u>

We are given the system of equations:

2x + y = 3

x = 2y - 1

Substituting x in the first equation:

2(2y - 1) + y = 3

Operating:

4y - 2 + y = 3

5y = 3 + 2

y = 5/5 = 1

y = 1

Since:

x = 2y - 1

Then:

x = 2(1) - 1

x = 1

Solution:

x = 1

y = 1

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7 0
3 years ago
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Natasha was thinking of a number. Natasha doubles it and gets an answer of 93. What was the original number?
saul85 [17]

Answer:

46.5

Step-by-step explanation:

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3 years ago
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The scores on a math test are normally distributed with a mean of 64 and a standard deviation of 8. Tara scored 52 on the test.
Dvinal [7]
A z-score<span> is the number of standard deviations from the mean a data point is.
</span>
Standard deviation explains by how much the members of a group differ from the mean value for the group.
Using the z-score formula:
                                           z = ( x  - μ ) ÷ σ
Where;
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            σ = Standard deviation 

Z- Score (Tara) = ( 52 - 64 ) ÷ 8
                         = - 12 ÷ 8
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Z- Score (Jamal)  = ( 82 - 64 ) ÷ 8
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6 0
3 years ago
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Arada [10]
Correct answer D(4,2) only this one is at the pink area that is solution of this system
5 0
3 years ago
Read 2 more answers
Add. *
Ann [662]

Answer:

31x³-60x²+7x-75

Step-by-step explanation:

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(-19x³+7x)+(50x³-60x²-75)

-19x³+50x³+7x-60x²-75

31x³-60x²+7x-75

3 0
3 years ago
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