3 years ago

How do you solve this ?

Mathematics

1 answer:

mel-nik [20]3 years ago

4 0

I think the anwser is sixteen

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the present age of father and son is 7:2. after 5 yrs the age of son is 37% the age of his father. what is the present age of fa

zvonat [6]

Let present ages of father be x and of son is y years

x/y = 7/2, 2x=7y, y=2x/7
(y+5)=37/100*(x+5)
(2x/7+5)=37/100*(x+5)
(2x+35)/7=(37x+185)/100
200x+3500=259x+1295
259x-250x=3500-1295
59x=2205
x=37.37 years

8 0

3 years ago

What's the answer to this??????????????

SashulF [63]

Answer:

15/56 a²

Step-by-step explanation:

because we are ✖️ it

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1 year ago

a study of the effects of exercis used rats bred to have high or low capacity for exercise. The 8 high capacity rats had mean bl

zavuch27 [327]

Answer:

$t=-2.86$

Step-by-step explanation:

From the question we are told that:

Sample 1 $n_1=8$

Sample 1 mean blood pressure $\=x_1=89mmHg$

Sample 1 variance $\sigma_1=81$

Sample 2 $n_2=8$

Sample 2 mean blood pressure $\=x_2=105mmHg$

Sample 2 variance $\sigma_2=169$

Generally the equation for the test of statistic is mathematically given by

$t=\frac{\=x_1-\=x_2}{\sqrt{\frac{\sigma_2}{n_1}+\frac{\sigma_2}{n_2} } }$

$t=\frac{89-105}{\sqrt{\frac{81}{8}+\frac{169}{8} } }$

$t=-2.86$

therefore the samples test for comparing the two population means

$t=-2.86$

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3 years ago

Which of the following statements is true about the three quadrilaterals?

KIM [24]

Answer:

Step-by-step explanation:

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3 years ago

You put a border around the perimeter of this room. How many yards of border did you

Fantom [35]

Yards of the border is 22 yards.

Step-by-step explanation:

Step 1: Find the perimeter of the room to find the yards of border to be used.

⇒ Perimeter = 2(length + breadth) = 2(6 + 5) = 22 yd

7 0

3 years ago