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3 years ago

Question 8

Mathematics

2 answers:

Dima020 [189]3 years ago

6 0

Answer:

Step-by-step explanation:

y = 12x + 100

you have x amount of people each cost $12 for pizza and soda and the $100 for the room is a consant

Luden [163]3 years ago

4 0

Answer:

Step-by-step explanation:

It costs 12 dollars per person so that will be the "slope" of the equation. The base is 100 dollars so that will be the y-intercept. Together it is 12x+100

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Please help solve this !!! asapp 30 points!! i'll mark brainliest as well :) tysm

zalisa [80]

Answer:

1st one) 3x +44

3rd one)2y-8

4th one)8x

6 0

3 years ago

torisob [31]

Answer:

B and E

Step-by-step explanation:

A. Incorrect; the expanded form of 3(4x + 3) is 12x + 9

B. Correct; the cumulative property of addition was applied here.

C. Incorrect; this adds up to 8x + 52, which is not equivalent to 12x + 9

D. Incorrect; this equals 13

E. Correct; this is the expanded form of 3(4x + 3)

4 0

3 years ago

Read 2 more answers

Find the amount of social security deducted from the check: $835 biweekly.

Inga [223]

Normally 8% is deducted as social security tax.

So,
8% of 835 = 8/100 x 835
= $56.36 (approx.)

4 0

3 years ago

Please help I'm so confused

blagie [28]

Answer:

(-2, -4), (-1, -1), (0, 0), (1, -1), (2, -4)

Step-by-step explanation:

You plug in x values to get the y values are dot-in the points!

y = -x^2

You plug in -2 and get -(2)^2 = -(4) = -4

Same thing with all other values.

3 0

3 years ago

A company with a fleet of 150 cars found that the emissions systems of only 4 out of the 25 they tested failed to meet pollution

salantis [7]

Answer:

No, there is no strong evidence that the percentage of the fleet out of compliance is different from their initial thought.

Step-by-step explanation:

We are given that a company with a fleet of 150 cars found that the emissions systems of only 4 out of the 25 they tested failed to meet pollution control guidelines.

The company initially believed that 30% of the fleet was out of compliance.

Let p = percentage of the fleet that was out of compliance.

SO, Null Hypothesis, $H_0$ : p = 30% {means that the percentage of the fleet out of compliance is same as their initial thought}

Alternate Hypothesis, $H_A$ : p $\neq$ 30% {means that the percentage of the fleet out of compliance is different from their initial thought}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = percentage of the fleet out of compliance = $\frac{4}{25}$ = 16%

n = sample of systems tested = 25

So, test statistics = $\frac{0.16-0.30}{{\sqrt{\frac{0.16(1-0.16)}{25} } } } }$

= -1.909

The value of the test statistics is -1.909.

Since in the question we are not given with the level of significance at which hypothesis can be tested, so we assume it to be 5%. Now at 5% significance level, the z table gives critical values between -1.96 and 1.96 for two-tailed test.

Since our test statistics lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that the percentage of the fleet out of compliance is same as their initial thought.

3 0

3 years ago