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pashok25 [27]
3 years ago
8

Help me please I am so sad

Mathematics
1 answer:
Mashcka [7]3 years ago
6 0

Answer:B 8;45

Step-by-step explanation:

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If two sides of a triangle are 5 and 7 inches longer than the third side and the perimeter measures 21, find the length of each
aleksandr82 [10.1K]
Hello

x
x +5 
x + 7

x + x + 5 + x + 7 = 21 
3 x = 21 - 12
3 x = 9
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3 , 5 et 7 pouces
7 0
3 years ago
4th term of (4x-y)^9
Neko [114]
Now, let's do the same as we did for the previous one here.

\bf (4x-y)^9\implies 
\begin{array}{llll}
term&coefficient&value\\
-----&-----&-----\\
1&+1&(4x)^9(-y)^0\\
2&+9&(4x)^8(-y)^1\\
3&+36&(4x)^7(-y)^2\\
4&+84&(4x)^6(-y)^3
\end{array}

notice again, how did we get 84 for the 4th element's coefficient? well 36 * 7 / 3.  and so on.  And you can just expand it from there.
3 0
3 years ago
The level of a lake was 8 inches below normal. It decrease 1 1/4 inches in June and 2 3/8 inches more in July. What was the new
zloy xaker [14]

Answer:

Step-by-step explanation:

1

the initial level is below normal so it is represented by a negative number. the level continued to decrease in June and July so those changes are also represented by negative numbers. find the sum of these values to find what the new level was with respect to the normal level

2

write the mixed numbers as improper fractions

3

get common denominator

4

add the numerators since all the numbers are negative and have a common denominator. write the improper fraction as a mixed number

3 0
3 years ago
Rose hiked at a constant rate of 13.3 miles per day for 7 days. Estimate the number of miles that Rose hiked during that time by
WARRIOR [948]
I think the answer is A 
6 0
3 years ago
Read 2 more answers
Please help me on number 3
Mars2501 [29]

circle=360°

360÷10=36

36÷3=12

Answer is 12

4 0
2 years ago
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