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3 years ago

I need help ASAP 7 and 2/5 + 2 and 1/2

Mathematics

1 answer:

irina1246 [14]3 years ago

8 0

7 2/5 + 2 1/2 = 9 9/10

You'd just times the denominators to a common number which would be 10 and the the numerator would be added together as 6 and 3. Then you end up with 9 9/10 as a mixed number

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Julian calculates the volume of a rectangular prism with the dimensions 3/4ft by 4 feet by 1/2 ft. His work is shown here.

lbvjy [14]

Answer:

He multiplied the denominators incorrectly

Step-by-step explanation:

we know that

The volume of a rectangular prism is given by the formula

V=LWH

we have

L=3/4 ft

W=5/1 ft

H=1/2

substitute

V=(3/4)(5/1)(1/2)= 3x5x1= 15

₋₋₋₋₋₋₋₋ ₋₋₋₋ ft³

4x1x2= 8

therefore

He multiplied the denominators incorrectly

7 0

2 years ago

The perimeter of a square P depends on the length of its sides S this can be written in function notation as P( s) what is the b

grandymaker [24]

Answer:

Step-by-step explanation:

7 0

2 years ago

If a line contains the point (0, -1) and has a slope of 2, then which of the following points also lies on the line?

QveST [7]

The correct answer is 2,1

6 0

3 years ago

Read 2 more answers

consider the following scenario: Assume daily protein intake values in a population of athletes are known to have a standard dev

Kipish [7]

Answer:

The 95% confidence interval for the population mean daily protein intake is between 69.97g and 84.03g.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{58.6}{\sqrt{267}} = 7.03$

The lower end of the interval is the sample mean subtracted by M. So it is 77 - 7.03 = 69.97g.

The upper end of the interval is the sample mean added to M. So it is 77 + 7.03 = 84.03g.

The 95% confidence interval for the population mean daily protein intake is between 69.97g and 84.03g.

5 0

3 years ago

Can someone help me with these 3

photoshop1234 [79]

24. 244 cm

25. 65 mm

26. 37/80 or 0.4625

8 0

3 years ago