(-11)-8+(-7)-(-14) Answer

if anyone can solve this gets a $10 gamestop card i already got the codeSolve for x. Show each step of the solution. 2.5(10 - x)

schepotkina [342]

Remark

Forget the Gamestop. I'd never use it. This one is on the house.

Solution

2.5(10 - x) + 10 = 72 - 1.5x*(5x + 12) The first step is to remove the brackets. Be very careful you understand the bracket on the right.

25 - 2.5x + 10 = 72 - 7.5x - 18 Study the signs carefully. Collect like terms.

35 - 2.5x = 54 - 7.5x Add 7.5x to both sides.

35 - 2.5x + 7.5x = 54 - 7.5x + 7.5x

35 + 5x = 54 Subtract 35 from both sides.

5x = 19 Divide by 5

x = 19/5

x = 3 4/5 = 3.8

Check

When you numbers are so cumbersome, you should check the answer.

LHS

2.5(10 - 3.8) + 10

2.5(6.2) + 10

15.5 + 10

25.5

RHS

72 - 1.5(5*3.8 +12)

72 - 1.5(19 + 12)

72 - 1.5(31)

72 - 46.5

25.5

RHS = LHS The solution checks.

4 0

4 years ago

Find a polynomial, which, when added to the polynomial 5x^2–3x–9, is equivalent to x^2-5x+6

alexandr1967 [171]

So this is easy counting
so 5x^2-3x-9
we have 5 x^2's
-3 x's
-9

wat do we add to that to get
1 x^2's
-5 x's
+6
so we do each
5x^2+what=1x^2
subtract 5x^2
from both sides
what=-4x^2
first is -4x^2

then we have -3x to -5x
-3x+what=-5x
add 3x to both sides
what=-2x
second is -2x

-9 to 6
-9+ what=6
ad d9
what=15
last is 15
thereffor add -4x^2-2x+15

6 0

3 years ago

Can Someone please explain also

IRINA_888 [86]

Answer:

y = 1/4x -10

Step-by-step explanation:

The equation would be y = 1/4x -10

we know that we have to set the equation up as y=mx+b

m being slope and b being y-intercept

we can see on the graph that the line intercepts the y-axis at -10, so that would be b

for slope, you can just look and count rise over run so:

it goes 10 up and 40 over which equals 10/40 also known as 1/4

hope that helped :)

4 0

3 years ago

The partial pressure of oxygen PaO2 is a measure ofthe amount of oxygen in the blood. Assume that the distribution ofPaO2 levels

Rus_ich [418]

Answer: a) 0.8665

b) 0.8190

Step-by-step explanation:

Given : The partial pressure of oxygen PaO2 is a measure ofthe amount of oxygen in the blood. Assume that the distribution ofPaO2 levels among newborns has a $\mu=$ 38 mmHg and $\sigma=$ 9 mmHg.