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Ratling [72]
2 years ago
6

Simplify the expression -17.8a-2.4a+25-19.5

Mathematics
1 answer:
Anika [276]2 years ago
6 0

Answer:

-20.2a+5.5

subtract the values with a in it and the ones without the a together.

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The area of a circle is 25pi m squared what is the circumference
IceJOKER [234]
\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
A=25\pi 
\end{cases}\implies 25\pi =\pi r^2\implies \cfrac{25\pi }{\pi }=r^2
\\\\\\
25=r^2\implies \sqrt{25}=r\implies 5=\boxed{r}\\\\
-------------------------------\\\\
\textit{circumference of a circle}\\\\
C=2\pi r\qquad \qquad C=2\pi\left( \boxed{5} \right)\implies C=10\pi
8 0
3 years ago
Molly does 15% of her homework in study hall. If she spent 45 minutes on homework in stuffy hall, how much time in minutes dose
kherson [118]
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6 0
3 years ago
Please help you will get 20 points and explain your answer please
sp2606 [1]

Answer:

Top prism = 262 in.² Bottom prism = 478 in.²

Step-by-step explanation:

top prism:

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sides: 19 x 4 x 2 = 152

bottom: 19 x 5 = 95

15 + 152 + 95 = 262

bottom prism:

front + back: 5 x 6 x 2 = 60

sides: 19 x 6 x 2 = 228

top + bottom: 19 x 5 x 2 = 190

60 + 228 + 190 = 478

7 0
4 years ago
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If bill had 2 apes and Ken had 7 who had more
slamgirl [31]
Ken because he had 7. 7 is more than 2
6 0
3 years ago
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A baby was born with a weight of 7 pounds and then began to gain 1.25 pounds per month. Write an equation for W, in terms of t,
oksano4ka [1.4K]

Answer:

7+1.25m=t

Step-by-step explanation:

3 0
3 years ago
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