Answer:
3x squared + 2x as you multiply everything in the bracket by what's on the outside of the bracket so it would be 3x multiply by x which equals 3x squared and 2 multiply x which equals 2x
3 to 4.....added = 7
3/7x = 210....3/7 of all factory workers (x) are men...and men = 210
x = 210 * 7/3
x = 1470/3 = 490...so there is 490 factory workers
4/7(490) = 1960/7 = 280...and there are 280 women....because 4/7 of all factory workers are women
a^2 + 2a - 3 = 0
a^2 + 2a = 3
a^2 + 2a + 1 = 3 + 1 (I added a 1 to both sides)
a^2 + 2a + 1= 4
(a + 1)^2 = 4
a = -3, 1
Answer:
0.53 inches per hour
Step-by-step explanation:
There is a difference in the typed numbers and your attached picture. I'm going to assume the numbers in the picture are the correct one.
Given:
inches of rain that fell = 2 1/2 inches
duration = 4 3/4 hrs
hence the unit rate in inches per hour
= inches of rain that fell ÷ duration
= 2 1/2 ÷ 4 3/4 (for easy mathematical manipulation, we will express the fractions as improper fractions)
= 5/2 ÷ 19/4
= 5/2 x 4/19
= 10/19
= 0.526316
= 0.53 inches per hour (rounded to nearest hundredth)
hope this helps!
