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docker41 [41]
2 years ago
9

Help please do at 11

Mathematics
1 answer:
Bumek [7]2 years ago
8 0

Answer:

Step-by-step explanation:

area =  \pir^{2}  so it's  \pi7^{2} = 153.938... cm^{2}

circumference is  2\pir =  2*\pi*7 = 43.98229 cm  

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Caden states that n^2 +3n + 2n is an equivalent expression to 6n. Why is Caden's statement incorrect?
malfutka [58]
\begin{gathered} \text{The simplification of n}^2+3n+2n\text{ is:} \\ i)n^2+5n \\ By\text{ collecting common term, this can be written in form of:} \\ ii)\text{ n(n+5)} \end{gathered}

Thus, options A and D hold, from the simplifications above.

Let's consider the validity of the remaining options provided.

\begin{gathered} \text{For option B)} \\ \text{substitute for n=1 into the expression n}^2+3n+2n,\text{ we have} \\ 1^2+3(1)+2(1)=1+3+2=6 \\ \text{substitute for n=1 into the expression 6n, we have} \\ 6(1)=6 \\ \text{Thus, the expression n}^2+3n+2n\text{ is equivalent to 6n, for n=1} \end{gathered}\begin{gathered} \text{For option C)} \\ \text{The expression n}^2+3n+2n\text{ does not simplify to 7n} \end{gathered}\begin{gathered} \text{For option E)} \\ \text{substitute for n=4 into the expression n}^2+3n+2n,\text{ we have:} \\ 4^2+3(4)+2(4)=16+12+8=36 \\ \text{substitute for n=6 into the expression 6n, we have:} \\ 6(4)=24 \\ \text{Thus, the two(2) expressions are not equivalent to each other, for n=4} \end{gathered}\begin{gathered} \text{For option F)} \\ \text{substitute for n=3 into the expression n}^2+3n+2n,\text{ we have:} \\ 3^2+3(3)+2(3)=9+9+6=24 \\ \text{substitute for n=3 into the expression 6n, we have:} \\ 6(3)=18 \\ \text{Thus, the two(2) expressions are not equivalent to each other, for n=3} \end{gathered}

Hence, the correct options that apply are options A, D, E and F

7 0
9 months ago
Please help: perimeter of polygon ABCDEF
Bas_tet [7]

Answer:

Step-by-step explanation:

4 0
2 years ago
Solve.<br><br> 5=1/5x−3<br><br> Enter your answer in the box.<br><br> x =
FrozenT [24]
You must multiply 5x-3 with 5, then you will get

25x-15 = 1
25x = 1+15
25x = 16
x = \frac{16}{25}
x = 0.64
3 0
3 years ago
Read 2 more answers
An airplane can ascend at a rate of 52 1/2 meters in 1/3 of a second. How many meters can the airplane ascend in one second?
IgorLugansk [536]

Answer:

157 and 1/5 meters

Step-by-step explanation:

52 and 1/2 meters times 3 is equal to 157 and 1/2

3 0
3 years ago
alonzo brought 17 packs of cola to a party , and each pack had 8 cans. lisa brought 7 cans of juice. how many cans did they brin
yanalaym [24]

Answer:

143

Step-by-step explanation:

17 times 8 =136, 136 + 7 = 143

3 0
2 years ago
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