Answer:
2(4-x)=26
Step-by-step explanation:
<u><em>1. Plug "-9" into each equation as "x"</em></u>
2(4--9)=26
5(-9)+30=75
5(12--9)=15
3(-9+11)=-16
<u><em>2. Solve each equation</em></u>
2(4--9)=26 ~ 26=26
5(-9)+30=75 ~ -5=75
5(12--9)=15 ~ 105=15
3(-9+11)=-16 ~ 6=-16
Answer:
x + y = 29
5x + 2y = 100
Step-by-step explanation:
Has 29 problems
then
x + y = 29
x be the number of worth 5 points questions:
5x
y be the number of worth 2 points questions
2y
the total both worth is 100 points
then:
5x + 2y = 100
Answer:
x + y = 29 5x + 2y = 100
5 less than the product of 5 and a number y is 22. (5y - 5 = 22)
Let's try to work backwards with this.
I
f we add 5 to 22, we get 27. (5y - 5 + 5 = 22 + 5)
27 divided by 5 is 5.4. (5y ÷ 5 = 27 ÷ 5)
Therefore,
y=5.4
Now, we can check this by plugging that into the first equation.
5y - 5 = 22
(5 × 5.4) - 5 = 22
27 - 5 = 22
22 = 22
Because both sides are equal, it proves that the answer is
y = 5.4
Answer:
x=40°
Step-by-step explanation:
x=180-75-65=40°
