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seraphim [82]
3 years ago
14

A student solved the following problem.

Mathematics
1 answer:
siniylev [52]3 years ago
8 0

Answer:

All of them are wrong. Because the solution is t=-15.

Step-by-step explanation:

t+7=-8

t=-8-7

t=-15

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What is 12 divided by 4
navik [9.2K]

Answer:

It is 3

Step-by-step explanation:

The equation 12 divided by 4 is 3

To make sure this is true 4 times 3 is 12

5 0
3 years ago
Simplify ( 1/2A + 1/2B )^2
zysi [14]
Notice that both A and B are multiplied by (1/2).

Thus, the given expression can be re-written as [(1/2)(A+B)]^2.

Square the (1/2) and the (A+B) separately, and then multiply together the resulting squares:

(1/4)(A^2 + 2AB + B^2)

4 0
2 years ago
Read 2 more answers
According to a study conducted by the Gallup Organization, the the proportion of Americans who are afraid to fly is 0.10. A rand
notsponge [240]

Answer: 0.1457

Step-by-step explanation:

Let p be the population proportion.

Given: The proportion of Americans who are afraid to fly is 0.10.

i.e. p= 0.10

Sample size : n= 1100

Sample proportion of Americans who are afraid to fly =\hat{p}=\dfrac{121}{1100}=0.11

We assume that the population is normally distributed

Now, the probability that the sample proportion is more than 0.11:

P(\hat{p}>0.11)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.11-0.10}{\sqrt{\dfrac{0.10(0.90)}{1100}}})\\\\=P(z>\dfrac{0.01}{0.0090453})\ \ \ [\because z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}} ]\\\\=P(z>1.1055)\\\\=1-P(z\leq1.055)\\\\=1-0.8543=0.1457\ \ \ [\text{using z-table}]

Hence, the probability that the sample proportion is more than 0.11 = 0.1457

3 0
3 years ago
If my data set had an outlier that was quite a bit more than the other numbers in my data set, what would it do to
masha68 [24]
It would increase the average, just by a bit.
7 0
2 years ago
Mrs. McCarthy bought 1.5 pounds of chicken from Smiths. She paid a total of $6.75 for the chicken. What was the price per pound?
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$ 6.75/ 1.5 lbs

$4.50 per lb

4 0
2 years ago
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