Answer:
68.
Step-by-step explanation:
The common difference d = -19 - (-22) = 3
So the 31st term =
a31 = -22 + (31-1)3
= -22 + 90
= 90 - 22
= 68.
8 children were younger than 5 years old. 21 children were older than 7 years old
Answer:
10m
Step-by-step explanation:
We can set up an equation to solve this.

This equation can be created since we are given two similar sides of both triangles.
Now, cross multiply and simplify to solve for
.

The answer is sensible, and if you put 10 into the same equation from earlier, you will see that it is accurate.
Therefore, the value of
is 10m.
your answer would be the last answer choice
To find if it's a right triangle, we use the Pythagorean Theorem of a² + b² = c² where a and b are the legs of the triangle (the shorter measurements) and c is the hypotenuse (the biggest measurement).
28² + 34² = 43²
784 + 1156 = 1849
1940 ≠ 1849
No. This is not a right triangle. The sum of the squares of the shorter measurements (AKA the legs) do not equal the square of the biggest measurement.