Answer:
a^2
−10a+21
Step-by-step explanation:
(a−7)(a−3)
Apply the distributive property by multiplying each term of a−7 by each term of a−3.
a^2
−3a−7a+21
Combine −3a and −7a to get −10a.
a^2
−10a+21
Answer:
Step-by-step explanation:
500 cents in all Is equivalent to $5
6-cent: 20
8-cent: 30
10-cent: 10
20-cent: 2(states in word problem)
Answer:
She should cut each diagonal piece 10 ft long.
Step-by-step explanation:
The bottom face of the box is a rectangle 8 ft by 6 ft.
A diagonal of a rectangle divides the rectangle into two congruent right triangles. With a right triangle you can use the Pythagorean theorem.
a = length of rectangle = leg of right triangle
b = width of rectangle = other leg of right triangle
c = diagonal of rectangle = hypotenuse of right triangle
a^2 + b^2 = c^2
(8 ft)^2 + (6 ft)^2 = c^2
64 ft^2 + 36 ft^2 = c^2
c^2 = 100 ft^2
Take the square root of each side.
c = 10 ft
Answer: She should cut each diagonal piece 10 ft long.
Sorry I don't what the answer would be for A. But B would be (3,13)