Answer: a
Step-by-step explanation:
Answer:
x^2 + 7x - 3 = 0
Step-by-step explanation:
I think you meant "width of the frame" from outside of frame to outside of mirror.
Let x represent the width of the frame.
Area of mirror is (3 ft)(4 ft) = 12 ft^2. Total area of mirror and frame is 15 ft^2. The 3 ft^2 difference is the area of the frame.
But you were asked to find a quadratic equation that would give you the "width" of the frame.
The "new" width would be 3 + x and the "new" height would be 4 + x.
Then the area of the mirror and frame together would be
A = (3 + x)(4 + x) = 15 ft^2, or
12 + 7x + x^2 = 15 ft^2, or
x^2 + 7x - 3 = 0. This is the desired quadratic equation.
When answer choices are given, please share them when you post a question. Thank you.
Answer:
x>4
Step-by-step explanation:
trust
1. Use the Pythagorean Theorem because this is a right triangle:
a^2 + b^2 = c^2
34^2 + 23^2 = c^2
√ 1685 = c
c = 41
answer: 41
Answer:
21
Step-by-step explanation:
1. Simplify 5 × 5 to 25.
25 + 2 × -2
2. Simplify 2× −2 to −4.
25 − 4
3. Simplify.
21
