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N76 [4]
3 years ago
10

In a class of 30 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose

to raise his or her hand. Eight hands go up. Then the professor asked everyone with a pierced ear to do likewise. This time there are 25 hands raised. How many students have piercings both on their ears and their noses?
Mathematics
1 answer:
e-lub [12.9K]3 years ago
4 0
There are 4 students who have piercings both on their ear and their noses.

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Someone please help me will give brainliest!!!!!
ololo11 [35]
I believe the fastest way to solve this problem is to take any two of the given points and to find the slope and y-intercept of the line connecting those two points.  

Let's choose the 2 given points (-3,16) and (-1,12).
Going from the first point to the second, the increase in x is 2 and the increase in y is actually a decrease:  -4.  Thus, the slope of the line connecting these two points is m = -4/2, or m = -2.

Now use the slope-intercept formula to find the y-intercept, b.

One point on the line is (-3,16), and the slope is m = -2.

Thus, the slope-intercept formula y = mx + b becomes 16 = -2(-3) + b.
Here, b comes out to 10.

So now we have the slope and the y-intercept.  Write the equation:

y = mx + b becomes y=-2x+10.  Which of the four given answer choices is the correct one?
3 0
3 years ago
What is the area of a circle with a radius of 6 inches?
Vika [28.1K]

Answer:

The answer to your question is   113.04 in²

Step-by-step explanation:

To solve this problem substitute the values in the formula and simplify.

Data

Area = ?

radius = 6 in

π = 3.14

Formula

Area = π x r²

Substitution

Area = (3.14) x (6)²

Simplification

Area = 3.14 x 36

Result

Area = 113.04 in²

7 0
3 years ago
What is the lowest common denominator of the following rational expressions?
Damm [24]

Answer:

I think its A

Step-by-step explanation:

3 0
3 years ago
−(−49) = −49 true or false?
vova2212 [387]

I hope this helps you

false

cause two negative numbers multiple must be positive

(-1).(-49)

+49

5 0
3 years ago
Can someone. help me solve this pls .
olchik [2.2K]

Answer:

1.108

729 =  {n}^{6} \\  \sqrt[6]{729}  =   \sqrt[6]{ {n}^{6} }  \\ n = 1.108

7 0
3 years ago
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