3 years ago

Someone help me on this math problem

Mathematics

1 answer:

densk [106]3 years ago

6 0

The answer to the question

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Section 5.2-9. Solve the following system of equations by substitution or elimination. Enter your answer as (x,y).2x+y = 2-3x-2y

Alika [10]

$\begin{gathered} (2x+y=2)\times2 \\ -3x-2y=-8 \\ 4x+2y=4 \\ -3x-2y=-8 \\ \text{subtract above two equations} \\ x=-4 \\ \text{put the value of x in equation 1st then get y} \\ 4(-4)+2y=4 \\ -16+2y=4 \\ 2y=20 \\ y=10 \\ (x,y)=(-4,10) \end{gathered}$

6 0

1 year ago

Read 2 more answers

In the expression, x^2 + 6x + 9, which is the coeffcient?

ikadub [295]

The coefficient is the number next to the letter.

Although the x squared term has a coefficient of 1, it is not listed in the answer choices. However, the coefficient of the middle term 6x is listed.

Answer: 6

3 0

2 years ago

Please help!!! it will mean alot :/

ASHA 777 [7]

Answer:

Answwe is 44

Step-by-step explanation:

that the answer

8 0

2 years ago

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Which of the following is the equation for the graph shown?<br> PLS HELP... NEED ANSWER ASAP

lord [1]

Answer:

D the last one

Step-by-step explanation:

3 0

3 years ago

A teacher claims that the proportion of students expected to pass an exam is greater than 80%. To test this claim, the teacher a

erica [24]

Answer:

z=-1.591

Step-by-step explanation:

Null Hypotheses,

$H_0 : p=0.8\\H_a: p>0.80$

So we use z-test for one population proportion (right-tailed test)

According to this informaton, we defined that

$\alpha=0.05$

$z_c=1.64$ (critical value)

So our Rejection region is $R={z:z>1.64}$

$z=\frac{\bar{p}-p_0}{\sqrt{p_0(1-p_0)/n}} = \frac{0.755-0.8}{\sqrt{0.8(1-0.8)/200}}=-1.591$

Not rejection.

6 0

3 years ago

Someone help me on this math problem​

Someone help me on this math problem