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3 years ago

CAN SOMEONE HELP ME WITH THIS?!?!

Mathematics

2 answers:

Nat2105 [25]3 years ago

7 0

.......................:)

Talja [164]3 years ago

6 0

Answer:

Not following PEMDAS

Step-by-step explanation:

In the first one, they didn't follow PEMDAS. You have to add 3 and 12 because they're in parenthesis, so it would be:

4 x (3 + 12) =

4 x 15=

Second one:

4^2 - 2 x 3 + 6 =

16 - 2 x 3 + 6 =

16 - 6 + 6 =

10 + 6 =

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The sets of rational numbers and irrational numbers combine to make the (whole,real) numbers. Circle the correct term.

cupoosta [38]

The correct term would be real numbers because whole numbers only belong in rational numbers. However, real numbers include BOTH ration and irrational numbers.

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4 years ago

Linear equation: -1

Anika [276]

Answer:

The right answer is:

the addition property of equality and then the division property of equality

Step-by-step explanation:

Given equation and steps to solve it are:

Step 1: –3x – 5 = 13

Step 2: –3x = 18

Step 3: x = –6

In step two, -5 has to be removed from left hand side of the equation so additional property of equality will be used i.e. adding 5 on both sides

Similarly in the third step, to remove -3 with x , division property of equality will be used i.e. dividing both sides by -3

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The right answer is:

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3 years ago

Read 2 more answers

For any. Vertical intercept the _______ coordinate is zero

Nonamiya [84]

The X coordinate has to be 0

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3 years ago

18/40 in it's simplest form

marusya05 [52]

Answer:

9/20

Step-by-step explanation:

I guess I was help full for u

plz follow me for more updates

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4 years ago

Suppose a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%. A cell phon

leva [86]

Answer:

We conclude that the actual percentage of households is equal to 30%.

Step-by-step explanation:

We are given that a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%.

Their marketing people survey 150 households with the result that 43 of the households have three cell phones.

Let p = proportion of households that have three cell phones NOT known.

So, Null Hypothesis, $H_0$ : p = 30% {means that the actual percentage of households is equal to 30%}

Alternate Hypothesis, $H_A$ : p $\neq$ 30% {means that the actual percentage of households different from 30%}

The test statistics that would be used here One-sample z-test for proportions;

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

where, $\hat p$ = sample proportion of households having three cell phones = $\frac{43}{150}$ = 0.29

n = sample of households = 150

So, the test statistics = $\frac{0.29-0.30}{\sqrt{\frac{0.30(1-0.30)}{150} } }$

= -0.27

The value of z test statistic is -0.27.

Also, P-value of the test statistics is given by;

P-value = P(Z < -0.27) = 1 - P(Z $\leq$ 0.27)

= 1 - 0.6064 = 0.3936

Now, at 1% significance level the z table gives critical value of -2.58 and 2.58 for two-tailed test.

Since our test statistic 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 actual percentage of households is equal to 30%.

4 0

3 years ago