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Degger [83]
3 years ago
9

Solve for a: −40+10a=-70

Mathematics
2 answers:
gayaneshka [121]3 years ago
7 0

Answer:

a = -3

Step-by-step explanation:

−40 + 10a = -70

10a = -70 + 40

10a = -30

a = -30/10

a = -3

sveta [45]3 years ago
6 0
1.add 40 to -70 (10a=-30)
2. Multiply 10a and -30 by 10
3. The answer is: a=-3
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A Florida neighborhood is comprised of a total of 250 houses of which 12% are in foreclosure. A random sample of 91 homes from t
natka813 [3]

Answer:

the standard error of the proportion is 0.0272

Step-by-step explanation:

We have that if the sample size is greater than 5% of the entire population, a finite population correction factor (fpc) is multiplied with the standard error :

fpc = \sqrt{\frac{N -n}{N -1} }

We know that N = 250 n = 91, replacing:

fpc = \sqrt{\frac{250 - 91}{250 -1} }

fpc = 0.799

Now, the formula would then be:

SE  = \sqrt{\frac{p * (1 -p)}{n} }*fpc

Now replacing, knowing that p = 0.12

SE= \sqrt{\frac{0.12 * (1 - 0.12)}{91} }*0.799

SE = 0.0272

So the standard error of the proportion is 0.0272

6 0
3 years ago
What is 25% less than x
vladimir2022 [97]

Answer:

3/4x

Step-by-step explanation:

5 0
3 years ago
It takes a turtle 3 ¼ hours to walk 1 ½ miles. How many hours does it take to walk one mile?
Norma-Jean [14]

Answer:

It will take 6/13 hours to walk one mile

Step-by-step explanation:

Here, we want to calculate the number of hours it take to walk one mile

From the question, 1 1/2 miles take 3 1/4 hours

the number of hours it will take to walk 1 mile will be;

1 1/2 divided by 3 1/4

= 3/2 divided by 13/4

= 3/2 * 4/13 = 6/13 hours

4 0
2 years ago
a diver is exploring the water of the great barrier reef she is currently 25 feet from the surface of the water and plans to exp
11111nata11111 [884]

Answer:

6.25

Step-by-step explanation:

she is at 25

she needs to be at 75 which means she needs 50 more feet

at 8 per minute she will reach the depth in 50/8 = 6.25 minutes or 6 minutes and 15 seconds

6 0
2 years ago
Find the missing term and the missing coefficient of the following equation: (6a −______)5a =______a^2 − 35a
sergiy2304 [10]
The missing term in the left side of the equation is 7. Therefore:

(6a-7)5a

On the other hand, the missing coefficient in the right side of the equation is 30. Therefore,

30a^2 - 35a

Combining the left and right sides of the equation:

(6a-7)5a = 30a^2-35a

I hope my answer has come to your help. Thank you for posting your question here in Brainly.


5 0
3 years ago
Read 2 more answers
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