Can someone answer these for me i don't understand it

Mathematics

2 answers:

disa [49]2 years ago

8 0

Answer:

1. -25 - 16m

2. 13x + 14

6. -39 - 8h

7. -180c

Step-by-step explanation:

tiny-mole [99]2 years ago

4 0

Step-by-step explanation:

1.) 8(-3) + 8(-2m)

= -24 -16m

2.) 10x +14 + 3x

= 13x +14

6.) -7 -8h - 32

= -8h - 39

7.) -36c -45

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Im sorry for so many questions but i need help badly.

vlada-n [284]

The ratio of the circumference to the diameter is defined as pi
pi=circumference/diameter
that is how they got pi
in this question it woul be 15.7/5 which would be 3.14,

c=2pir
a=pir^2

c=2pir=16pi
divide both sides by 2pi
r=8

a=pir^2
a=pi8^2
a=pi64
a=64pi in²

5 0

2 years ago

Which sample is biased?<br>Please Answer!!

kicyunya [14]

Answer:

(Don’t take my word because I don’t want you to get the question wrong) I would go with a or b in my opinion. But choose the one you think is right.

Step-by-step explanation:

7 0

2 years ago

If a/\2+1/a/\2=11, then a+1/a=?

Nadya [2.5K]

Answer:

$\pm \sqrt{13}$

Step-by-step explanation:

$\bigg(a + \frac{1}{a} \bigg)^{2} = {a}^{2} + \frac{1}{ {a}^{2} } + 2 \times a \times \frac{1}{a} \\ \\ \bigg(a + \frac{1}{a} \bigg)^{2} = 11 + 2 \\ \\ \bigg(a + \frac{1}{a} \bigg)^{2} = 13 \\ \\ \bigg(a + \frac{1}{a} \bigg) = \pm \sqrt{13}$