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kvv77 [185]
3 years ago
14

What is 80 + 80 just give me a number

Mathematics
2 answers:
Rama09 [41]3 years ago
4 0

Answer:80 + 80= 160

Step-by-step explanation:

weqwewe [10]3 years ago
3 0
Well it is 160 welcome
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There are 16 boys and 18 girls in the classroom. .What is the ratio of boys to girls in simplest form?
vovikov84 [41]
<h3>Answer: Choice D.  8:9</h3>

Work Shown:

16 boys: 18 girls

16:18

16/2:18/2

8:9

I divided both parts of the ratio by the GCF 2 in order to reduce from 16:18 to 8:9. For every 8 boys there are 9 girls.

4 0
3 years ago
Can someone please help me look at the picture!
MrRa [10]

Answer:

21m

Step-by-step explanation:

So for the rectangle, do 5*6, and you will get the area of the whole backyard. Then to get the area of the grass, you do 3*3 to get 9.

Finally, to get the cement, you subtract the area of the grass from the area of the whole backyard so 30-9 to get 21.

5*6=30

3*3=9

30-9+21

Please mark brainliest if you can!

8 0
3 years ago
Y = -41 - 5<br> y = 3x - 2<br> Is (3, 7) a solution of the system?
bagirrra123 [75]
7=-41-5
7=-36
false

7=3(3)-2
7=9-2
7=7
true

since one is true and one is false its not a solution of the system
6 0
3 years ago
Read 2 more answers
Suppose that the salaries, in thousands of dollars, of the managers for a industry are normally distributed with an unknown mean
Marrrta [24]

Answer: t _(α/2) = 2.060

Step-by-step explanation:

Given that;

sample size n = 26

confidence interval = 95%

level of significance α = ( 1 - 95/100 ) = 0.05

but from the question the salaries (26) are use to estimate the mean of the population so, its a two tail test

therefore our level if significance α will be divided by 2 = 0.05/2 = 0.025

now our degree of freedom df = 26 - 1 = 25

FROM standard t-table value

the critical value of t for the level of significance 0.025

and 25 degree of freedom is 2.060

therefore, t _(α/2) = 2.060

6 0
3 years ago
Jaclyn estimates the square root of 50 in the following way:
OLga [1]
<h2>Hello!</h2>

The answer is:

a) Her reasoning is incorrect, she applied a wrong operation, the way to simplify the expression was using the square root property. If we want to extract a number of a square root, we must square that number first in order not to modify the expression.

b) We have that:

\sqrt{200}=14.14

and rounding to the nearest tenth, we have that:

\sqrt{200}=14.1

<h2>Why?</h2>

To solve the problem, we need to remember the following property of square roots:

\sqrt{ab}=\sqrt{a}*\sqrt{b}

We are given the expression:

\sqrt{200}

We can rewrite it by the following way:

\sqrt{100*2}

Now, applying the square root property we have:

\sqrt{100*2}=\sqrt{100}*\sqrt{2}=10\sqrt{2}=14.14

Therefore,

a) Her reasoning was wrong, she applied a wrong operation, the way to simplify the expression was using the square root property. If we want to extract a number of a square root, we must square that number first in order not to modify the expression.

b) We have that:

\sqrt{200}=14.14

and rounding to the nearest tenth, we have that:

\sqrt{200}=14.1

Have a nice day!

6 0
4 years ago
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