400 times 45.2
Show all work

18080!

Step-by-step explanation:400 x 450

1. Multiplying from the oneths place ( turning 45.2 into 450)

      2x0=0  2x0=0  2x4=8 = So the first answer is 800

2. Multiply from the tenths place

5 x 0 = 0   5 x 0 = 0   5 x 4 = 20 = the second answer is 2000

Multiplying the hundredths place

4 x 0 = 0  4 x 0 = 0   4 x 4 = 16  = The third answer is 1600

800 + 2000 + 1600 = 18080    Hope this helped! :)

is should be y = 5x

step-by-step explanation:

correct me if im wrong

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15