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Ahat [919]
3 years ago
13

Two rectangles have the same area of 70m2. It is given that the length of the first rectangle is 4m longer and the width is 2m s

horter than the dimensions of the second rectangle. Find the lengths of the sides of these rectangles.
Mathematics
1 answer:
meriva3 years ago
6 0
The answer is the first rectangle has the length 14 m and the width 5 m. The second rectangle has the length 10 m and the width 7 m.

The equation is...
70=(70/y+4)*(y-2)     {y= width of the first rectangle}
and when you solve you get y is either -5 or 7 and because -5 doesn't make sense y is equal to 7
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Tim and Dan were playing football against Jason and Luke.Touchdowns are worth 7 points .Tim and Dad scored 4 touchdowns. Jason a
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Answer:

35, if Tim and Dan scored 4 together, 7 if each scored 4 touchdowns

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Travis gained 9 pounds during the holidays. He dieted and lost 14 pounds but gained 3 more when he went on vacation . By the end
Jobisdone [24]
He lost 8 pounds i think i am almost positive that right.
4 0
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What is the square root of 64 over 225 with a negative outside of the radical?
irinina [24]
The square root of  (64/225)  is the same as  √64 / √225 . 
That could make the whole thing easier.

Do you know what either of those separate square roots is ?

You're right !    I'm so impressed!
The square root of  64  IS  8, and the square root of  225 surely is  15 .
You really know your stuff !

So now, the expression is  √64 / √225  =  <em>8 / 15</em> .

Oh, I almost forgot, it has a negative sign before it.  OK,so the answer is <em>- 8/15</em> .

5 0
3 years ago
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 110 engines
slava [35]

Answer:

we will fail to reject the null hypothesis and conclude that the mean pressure is not different from 4.7 psi

Step-by-step explanation:

Let's first define the hypothesis;

Null hypothesis: H0: μ = 4.7

Alternative hypothesis: Ha: μ ≠ 4.7

We have;

Sample size; n = 110

Sample mean; x¯ = 4.6

Variance: σ² = 0.64

Standard deviation; σ = √0.64 = 0.8

Formula for test statistic is;

z = (x¯ - μ)/(σ/√n)

z = (4.6 - 4.7)/(0.8/√110)

z = -0.1/0.0763

z = -1.31

From online p-value from z-score calculator attached, using; z = -1.31, two tailed hypothesis, significance value of 0.1, we have;

P-value = 0.190196

The p-value is greater than the significance value and thus we will fail to reject the null hypothesis and conclude that the mean pressure is not different from 4.7

σ μ

8 0
3 years ago
PLEASE HELP!!
ruslelena [56]

Answer: 104 miles

Step-by-step explanation:

If 2.5 in = 52 mi, and 2.5 × 2 = 5, then 2.5(2) = 52(2)

5 in = 104 mi

3 0
3 years ago
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