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3 years ago

Need help plzzzzzzzz

Mathematics

1 answer:

Igoryamba3 years ago

8 0

Box 1: A and J

Box 2: Point B

Box 3: Sorry I cant see it. Can you please send it again?

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Two parallel lines cut by a transversal. What is the value of x?

hodyreva [135]

The 2 angles are alternate angles so they are equal:-

3x + 4 = 115
3x = 115-4 = 111
x = 37 answer

4 0

2 years ago

recent survey found that 71% of all adults over 50 wear glasses for driving. In a random sample of 30 adults over 50, what is

valentina_108 [34]

Answer:

Mean = 21.3

Standard Deviation = 2.48

Step-by-step explanation:

We are given the following in the question:

p = 71% = 0.71

Sample size, n = 30

We have to find the mean and the standard deviation of those that wear glasses.

$\text{Mean} = np\\=30(0.71)\\=21.3$

Thus, the mean of those who wear glasses is 21.3

$\text{Standard deviation} = \sqrt{npq}\\=\sqrt{np(1-p)}\\=\sqrt{30\times 0.71\times (1-0.71)}\\=2.48$

Thus, the standard deviation of those who wear glasses is 2.48

5 0

2 years ago

Which angle is complementary to COD

dezoksy [38]

Answer:

90° - COD

Step-by-step explanation:

Because if it's complementary, the mystery angle and COD add up to 90°

4 0

2 years ago

Read 2 more answers

I need help on this can you help me please

Elis [28]

Answer:

The first one is linear, the second one is not linear, and the third one is linear.

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

PLS HELP ME WITH THIS!!!!!! HOW DID THEY GET 80ft^2

noname [10]

$\huge \boxed{\mathfrak{Question} \downarrow}$

Determine the surface area of the right square pyramid.

$\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}$

The formula for finding the surface area of a right square pyramid is ⇨ b² + 2bl, where

b = base of the right square pyramid
l = slant height of the right square pyramid.

In the given figure,

base (b) = 4 ft.
slant height (l) = 8 ft.

Now, let's substitute the values of b & l in the formula & solve it :-

$\sf \: {b}^{2} + 2bl \\ = \sf \: {4}^{2} + 2 \times 4 \times 8 \\ = \sf \: 16 + 8 \times 8 \\ = \sf \: 16 + 64 \\ = \huge\boxed{\boxed{ \bf 80 \: ft ^{2} }}$

So, the surface area of the right square pyramid is 80 ft².

7 0

2 years ago