5x^2+45x-7x+63
5x^2+38x+63
please vote my answer brainliest. thanks!
A. +27
B. +4
C.+21
A. -16
B. 23
C. 3
D. -70
E. -20
13. Pick a point and see which formula works.
Ay = -4, A'y = 7. Only the formula of selection D makes that translation.
14. Use the compound interest formula A = P*(1 +r/n)^(nt).
..1500*1.015^80 = 4935.99, matching selection C
15. The lid has a perimeter of 90", so the area of the sides is
.. 90" * 24" = 2160 in^2
The area of the lid is
.. 30" * 15" = 450 in^2
The gray area is (2160 -450) in^2 = 1710 in^2 larger, corresponding to selection C.
16. The only formula that maps (7, -1) to (21, -3) is that of selection D.
_____
The middle two problems are the only ones that require you to have prior knowledge. The others could be answered simply by seeing if the answers work.
Answer:
Entire perimeter = 169in
Step-by-step explanation:
add all the inches up
The points that lie on a number line, or the x-axis, have a y value of 0. Therefore, we can try applying the distance formula on points a and b given that:
a = (a,0)
b = (b,0)
d = √[(x₂ - x₁)² + (y₂ - y₁)²]
d = √[(a - b)² + (0 - 0)²]
d = √(a - b)²
d = a - b
Thus, the distance formula still applies to two points on a number line, it is just in a simplified form.
