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2 years ago

What is the y coordinate of the solution to the system of equations? 3x+6y=3 5x-y=27

1 answer:

7 0

Solve for y
eliminate x
multiply firs tequation by -5 and 2nd by 3 and add them

-15x-30y=-15
15x-3y=81 +
0x-33y=66

-33y=66
divide both sides by -33
y=-2

the y coordinate is y=-2

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horrorfan [7]

713000 is your answer

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2 years ago

Please help!!!! i am despite, i will mark brainlyest

Sedaia [141]

Answer:

x=12

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Step-by-step explanation:

paralellograms will become 360 degrees

so 2(5x) +2(10x)= 360

Simplify:

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divide both sides by 30 and isolate

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2 years ago

Can I have halp with all and an explanation because I am terrible at properties.

Salsk061 [2.6K]

1. 4 • (–3) • 5
so 4 x (-3) = -12 and then -12 x 5 = -60
2. (2.25 x 23) x 4
so (2.25 x 23) 51.75 and then 51.75 x4 = 207
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4 0

3 years ago

Administrators at a large public high school are interested in their students’ standardized test scores. Last year, the mean sco

ratelena [41]

Answer:

The appropriate hypotheses for performing a significance test is:

$H_0: \mu = 51$

$H_1: \mu > 51$

Step-by-step explanation:

Last year, the mean score on the state’s math test was 51. The administrators have trained the teachers in a new method of teaching math hoping to raise the scores on this standardized test this year.

At the null hypothesis, we test if the mean score this year is the same as last year, that is:

$H_0: \mu = 51$

At the alternate hypothesis, we test if the mean score improved this year from last, that is:

$H_1: \mu > 51$

The appropriate hypotheses for performing a significance test is:

$H_0: \mu = 51$

$H_1: \mu > 51$

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2 years ago

Consider the following polynomial x^2 +bx+12

yulyashka [42]

Answer:

7 and 8

Step-by-step explanation:

${x}^{2} + 7x + 12$

(x+3)(x+4)

${x}^{2} + 8x + 12$

(x+2)(x+6)

5 0

2 years ago