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charle [14.2K]
3 years ago
10

The IQ test is designed such that the scores on it are normally distributed with a mean of 100 and a standard deviation of 15. I

f
a person can score two standard deviations above the mean, then they are considered gifted. What score does a person need
in order to be classified as gifted?
Mathematics
1 answer:
kozerog [31]3 years ago
5 0

Answer:

130

Step-by-step explanation:

A standard deviation is 15, so 2 standard deviation is 30, 2 standard deviations above 100 is 100+30=130

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The length of a rectangle is five more than triple the width. If the perimeter is 154 inches, what are the dimensions
Mkey [24]

Answer:

Width = 18 inches

Length = 59 inches

Step-by-step explanation:

The length of a rectangle is five more than triple the width. If the perimeter is 154 inches, what are the dimensions

Perimeter of a rectangle = 2L + 2W

The length of a rectangle is five more than triple the width.

L = Length = 5 + 3W

W = Width

If the perimeter is 154 inches, what are the dimensions

Hence,

154 = 2L + 2W

154 = 2(5 + 3W ) + 2W

154 = 10 + 6W + 2W

Collect like terms

154 - 10 = 8W

144 = 8W

W = 144/8

W = 18 inches

Length = 5 + 3W

Length = 5 + 3(18)

Length = 5 + 54

Length = 59 inches

8 0
3 years ago
If the integral of f(x)dx = 2.3 from 1 to 3 and F'(x) = f(x), what is the value of F(3) - F(0). The graph will be inserted as a
lana66690 [7]
<span>F(3)−F(0)=<span>∫30</span>f(x)dx</span><span>
so it looks like 2.3+1=3.3</span>
4 0
3 years ago
Read 2 more answers
Can someone help? At least solve one that you might know, explain if you can.
Sladkaya [172]
The awnser for question 5 is 4/6
7 0
3 years ago
Solve using the distributive property of whole numbers. <br> 27,345 x 113 x-27,345 x 13​
rewona [7]

Answer:

2,734,500

Step-by-step explanation:

27,345 × 113 - 27,345 × 13 ← factor out 27,345 from each term

= 27,345(113 - 13)

= 27,345 × 100

= 2,734,500

8 0
2 years ago
Can somebody help me find y
Alex777 [14]

Answer:

y=-\frac{5x+9z}{7}, y=x-y+z=3, y=-8x+y=12

3 0
3 years ago
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