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3 years ago

1. SAT Math scores in recent years have had means around 490 and standard deviations

Mathematics

1 answer:

tatiyna3 years ago

3 0

Answer:

´The variance is 10000

Step-by-step explanation:

The variance is defined as the square of standard deviation, consequently it is as follows:

σ^2= $100^{2}$

σ^2=10000

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How do I do the algebra problem 5(b-1)?

nirvana33 [79]

Answer:

5b-5

Step-by-step explanation:

When doing these kinds of problems you want to do dributive property which means you multiply whatever number is outside of the (), which is 5, and multiply that by b and 1.

when numbers are outside the () and right next to them without anything like +,-, or a division sign, it means to multiply.

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3 years ago

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True or False? A secant is a line or segment that passes through a point on the circle and the center of the circle.

Musya8 [376]

Thr answer is False
That line is called diameter

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3 years ago

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X + 24 + 4 + 63 = 180

Helen [10]

Answer:

x=89

Step-by-step explanation:

180-91=89

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3 years ago

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A rectangle has a length of 3x + 7 and a width of 2x. If the perimeter of the

Art [367]

Answer:

The length of the rectangle is 31.

Step-by-step explanation:

We have that the length (L) and width (W) are:

$L = 3x + 7$

$W = 2x$

The perimeter of the rectangle is given by:

$P = 2W + 2L$

$94 = 2(2x + 3x + 7)$

$94 = 10x + 14$

$x = 8$

Now, we can calculate the length of the rectangle:

$L = 3x + 7 = 3*8 + 7 = 31$

Therefore, the length of the rectangle is 31 units.

I hope it helps you!

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3 years ago

At 10 am a 6-foot- tall man casts a 4.5 foot shadow. How long a shadow cast by a 50-foot tree?

vaieri [72.5K]

6 foot makes 4.5 foot shadow
1 foot makes=4.5/6
so 50 foot =4.5/6*50 = tree makes 37.5 foot shadow

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3 years ago