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Arturiano [62]
3 years ago
10

⚠️Warning answer fast⚠️

Mathematics
1 answer:
denis23 [38]3 years ago
6 0

Answer:

I think your answer is 48cm

Step-by-step explanation:

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2(a-7)=a+4<br> 15 6<br>PLS HELPPPPPPPPPPP​
muminat

Answer:

a = 18

Step-by-step explanation:

2(a-7)=a+4

Distribute 2 into left side: 2a -14 = a + 4

subtract a from both sides  2a-a-14 = a+4-a

Simplify: a  - 14 = 4

Add 14 to both sides: a - 14 + 14 = 4 +14

Simplify:   a = 18

If wanted, plug a into original to double check work:

plug in: 2 (18-7) = 18+4

do parenthesis first: 2 (11) = 18+4

do multiplication : 22 = 18+4

additions: 22 =22

a = 18 is correct.

8 0
3 years ago
Read 2 more answers
(04.05) Evan spent 20 hours doing homework last week. This week he spent 25 hours doing homework. He says that he spent 125% mor
natali 33 [55]

Answer:

Evan is correct

Step-by-step explanation:

To find this answer, we can use the formula A=PxW

A=Part, P=Percentage, W=Whole

We can fill in the numbers we know and leave blank (with the variable) the numbers we want to find out

In this scenario, we want to find out if 25 is 125% of 29

So we can use this formula and do the equation like this:

A=1.25x20

This gets us to 25

So Evan is correct!

Hope this helps and please award brainliest if possible!

3 0
2 years ago
A bullet travels at 1128 feet per second. How many miles per hour does that bullet go?
Katena32 [7]
1128 feet  = 1128/5280   miles
it travels at 1128/5280 miles per second

to convert to miles / hour  we multiply by 3600

so speed of the bullet  = (1128 * 3600) / 5280   =  769.1 mph to nearest tenth.

7 0
3 years ago
In a reaction to Talc powder lawsuits JNJ stock price dropped 20% from $140 what is the current price
m_a_m_a [10]

140*.20=28

140-28= $112

so, the current price is $112

5 0
3 years ago
If a researcher wishes to determine whether there is evidence that the mean family income in the U.S. is greater than $30,000, t
Doss [256]

Answer:

B) a one-tailed test should be utilized, in which the region of rejection is in the right (upper tail)

Step-by-step explanation:

Explanation:-

<u>one tailed test:</u>-

A test of any statistical hypothesis where the alternative hypothesis is one tailed test(right tailed or left tailed) is called a one tailed test.

For example, In a test for testing the mean of a population in a single tailed test.

we assume that the null hypothesis H0:μ = μ0 against the alternative hypothesis.

H1:μ > μ0 (right tailed)

H1:μ < μ0 (left tailed) is called one tailed test.

<u>Two tailed test</u>:-

In a test of statistical hypothesis where the alternative hypothesis is two tailed test.

we assume that the null hypothesis H0:μ = μ0

Alternative hypothesis H1 :μ ≠ μ0 is called two tailed test.

Given data

There is evidence that the mean family income in the U.S. is greater than $30,000

<u>we will use right tailed test.</u>

<u>Null hypothesis</u> :- H0:μ = μ0

<u>Alternative hypothesis</u>:-H1 : μ> 30,000 (right tailed test)

6 0
3 years ago
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