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Delicious77 [7]
3 years ago
10

Four more than seven times a number is 12.” Write an equation that represents the statement. Then solve.

Mathematics
1 answer:
Leona [35]3 years ago
3 0

7x + 4 = 12

7x = 12-4

7x = 8

x = 7/8

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What are the zeros of f(x)= x•x + 3x - 10?
drek231 [11]

Answer:

It is 9

Step-by-step explanation:

I don't knowhhrshheyd

5 0
3 years ago
Plis i need help whit this questionss​
zmey [24]

Question 1: x+2 = 8 doesn't belong in the given equations.

Question 2: The possible values for y are 0,1 and 2

Step-by-step explanation:

Question: Which one doesn't belong?

We will solve each equation one by one to get which equation doesn't belong with others

So,

x+4 = -2\\x+4-4 = -2-4\\x = -6

x+5 = -1\\x+5-5 = -1-5\\x = -6

x+2 = 8\\x+2-2 = 8-2\\x = 6

3-x=9\\3-x-3 = 9-3\\-x = 6\\x = -6

Hence,

x+2 = 8 doesn't belong in the given equations.

Question 2:

Given equation is:

x+y = 5

It is given that the values of x will be greater than 2 and less than 6 so values of x can be 3,4 and 5

So,

3+y = 5\\y = 5-3\\y = 2\\\\4+y = 5\\y = 5-4\\y = 1\\\\5+y = 5\\y = 5-5\\y = 0

Hence,

The possible values for y are 0,1 and 2

So,

x+2 = 8 doesn't belong in the given equations.

The possible values for y are 0,1 and 2

Keywords: Linear equation, variables

Learn more about linear equations at:

  • brainly.com/question/7419893
  • brainly.com/question/730852

#LearnwithBrainly

8 0
2 years ago
What is the product of -8/1 * -1/8​
spayn [35]

Answer:

1

Step-by-step explanation:

To multiply fractions, you multiply the numerator by the numerator and the denominator by the denominator. -8*-1 will turn positive because there are 2 negative signs, and will become 8. 1*8 is 8.

The fraction is now 8/8, which can be simplified to 1.

Therefore, 1 is the correct answer.

5 0
2 years ago
Read 2 more answers
Suppose that, in the past, 40% of all adults favored capital punishment. Do we have reason to believe that the proportion of adu
Alex_Xolod [135]

Answer:

The p-value of the test is 0.1469 > 0.05, which means that there is no reason to believe that the proportion of adults favoring capital punishment today has increased, using a 0.05 level of significance.

Step-by-step explanation:

Suppose that, in the past, 40% of all adults favored capital punishment. Test if the proportion has increased:

At the null hypothesis, we test if the proportion is still of 40%, that is:

H_0: p = 0.4

At the alternative hypothesis, we test if the proportion has increased, that is, is greater than 40%, so:

H_1: p > 0.4

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.4 is tested at the null hypothesis:

This means that \mu = 0.4, \sigma = \sqrt{0.4*0.6}

Random sample of 15 adults, 8 favor capital punishment.

This means that n = 15, X = \frac{8}{15} = 0.5333

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.5333 - 0.4}{\frac{\sqrt{0.4*0.6}}{\sqrt{15}}}

z = 1.05

P-value of the test and decision:

The p-value of the test is the probability of finding a sample proportion of 0.5333 or more, which is 1 subtracted by the p-value of z = 1.05.

Looking at the z-table, z = 1.05 has a p-value of 0.8531.

1 - 0.8531 = 0.1469.

The p-value of the test is 0.1469 > 0.05, which means that there is no reason to believe that the proportion of adults favoring capital punishment today has increased, using a 0.05 level of significance.

3 0
2 years ago
CLAY A potter crafts a triangular prism out of clay.
Shtirlitz [24]

Answer:

216 cm^3

Step-by-step explanation:

I am assuming this is a right triangular prism

V = area of the base * height

We need to find the area of the triangular base

A triangle = 1/2 b*h

                = 1/2 (12)4

                = 24

Substituting this into the volume equation

V = 24 * 9

   216 cm^3

8 0
3 years ago
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