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antoniya [11.8K]
4 years ago
6

Six more than eight times a number is 21

Mathematics
2 answers:
adelina 88 [10]4 years ago
4 0

Answer:

If your question is about creating an equation, the answer is

8x + 6 = 21                   6 more is after 8x

If your question is about the value of the equation, the answer is

1.875 or 15/8

Step-by-step explanation:

8x + 6 = 21                       Subtract 6 on both sides

      8x = 15                      Divide 8 on both sides

         x = 1.875

<h3><u><em>Please rate this and please give brainliest. Thanks!!! </em></u></h3><h3><u><em>Appreciate it! : ) </em></u></h3><h3><u><em>And always, </em></u></h3><h3><u><em>SIMPLIFY BANANAS          : )</em></u></h3>
ad-work [718]4 years ago
4 0

Answer:

The number is 1 \frac{7}{8}

Step-by-step explanation:

We just need to express this statement mathematically and the solve;

Let the number be x

6 + 8x =21

Subtract 6 from both-side of the equation

6-6 + 8x = 21 - 6

8x = 15

Divide both-side of the equation by 8

8x/8 = 15/8

(On the left-hand side of the equation, 8 on the numerator will cancel-out 8 on the denominator leaving us with just x while on the right-hand side 15 will be divided by 8)

x = 15 / 8

x = 1 \frac{7}{8}

The number is 1 \frac{7}{8}

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The answer is 15w^2 + 225w


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3 0
4 years ago
A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a ne
Evgen [1.6K]

Answer:

a. With 90% confidence the proportion of all Americans who favor the new Green initiative is between 0.6290 and 0.6948.

b. If the sample size is changed, the confidence interval changes as the standard error depends on sample size.

About 90% percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about 10% percent will not contain the true population proportion.

Step-by-step explanation:

We have to calculate a 90% confidence interval for the proportion.

The sample proportion is p=0.6619.

p=X/n=370/559=0.6619

The standard error of the proportion is:

\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.6619*0.3381}{559}}\\\\\\ \sigma_p=\sqrt{0.0004}=0.02

The critical z-value for a 90% confidence interval is z=1.6449.

The margin of error (MOE) can be calculated as:

MOE=z\cdot \sigma_p=1.6449 \cdot 0.02=0.0329

Then, the lower and upper bounds of the confidence interval are:

LL=p-z \cdot \sigma_p = 0.6619-0.0329=0.6290\\\\UL=p+z \cdot \sigma_p = 0.6619+0.0329=0.6948

The 90% confidence interval for the population proportion is (0.6290, 0.6948).

3 0
3 years ago
-4 + 3y = -43<br> what does y equal?
NeTakaya

Answer:

-13

Step-by-step explanation:

We remove the -4 by adding 4 to each side:

3y = -43 + 4

Now we simplify to give:

3y = -39

So now we divide both sides by 3 to give our answer of:

y = -39/3
y = -13
We can substitute this into the original equation to check our answer:

-4 + 3(-13) = -43

-4 + -39 = -43

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7 0
3 years ago
Read 2 more answers
Given ΔABC, m∠A = 50°, m∠B = 60°, and a = 7. Find c.
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Answer:

8.59 to the nearest hundredth.

Step-by-step explanation:

As there are 180 degrees in a triangle:

m <C = 180 - 50 - 60 = 70 degrees.

Using the Sine Rule:

a / sin A = c / sin C

7 / sin 50 = c / sin 70

c = 7 * sin 70 / sin 50

= 8.587 .

5 0
4 years ago
Can someone please help me I really need help
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Answer:

9:30 A.M

Hope this helps! Have a nice day :)

7 0
3 years ago
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