X=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3
Answer:
The representative sample contained more girls than boys.
Answer:
a = 30
b = 40
C
Step-by-step explanation:
This requires that you use a proportion.
a / (a + 15) = 40 / 60
The small triangle's sides are in proportion to the large triangles sides.
Reduce the right. Divide top and bottom by 20
a/(a + 15) = 40/20 // 60/20
a/(a + 15) = 2/3
Cross multiply
3a = 2(a + 15) Remove the brackets on the right.
3a = 2a + 30
Subtract 2a from both sides
3a-2a = 30
a = 30
Find B
b is done exactly the same way.
b/(b+20) = 2/3
3b = 2b + 40
3b - 2b = 40
b = 40
Answer: $115.50
Step-by-step explanation:
500.5-385 = x
Answer:
place your dots on the grid
Step-by-step explanation:
for example r would beeee uhm 3 y x 2
