Answer:
1. 3
3. 10
Step-by-step explanation:
1. Write a proportion by writing each ratio as a fraction and setting the fractions equal. A proportion is an equation where two ratios are equal to each other. Then cross multiply denominator and numerator of each fraction to solve.

2. Repeat same process as #1.
3. The ratio of girls to boys is 3:2. There are 15 girls. write a proportion to solve using b as the number of boys.

There are 10 boys.
Answer:
x = -3/2, x = 4
Step-by-step explanation:
4x² - 7x = 3x + 24, first put everything on one side
4x² - 10x - 24 = 0, factor 2 out
2(2x² - 5x - 12) = 0 then factor. You need two numbers that multiply to be -24 and add to be -5, so -8 and 3 are the factors.
(2x² - 8x) + (3x - 12) group them either way and then factor out GCF
2x(x - 4) + 3(x - 4) = 0
(2x + 3)(x - 4) = 0, set each factor = 0 and solve
2x + 3 = 0, 2x = -3, x = -3/2
x - 4 = 0, x = 4
Adult: sweet snacks 39.3 percent salty snack 60.7 percent
children : sweet snacks 71.3 percent salty snacks 28.7 percent
Answer:
<h2>652 ft²</h2>
Step-by-step explanation:
Look at the picture.
It's a net of right rectangular prism.
We have three pairs of rectangles:
7ft × 8ft
7ft × 18ft
8ft × 18ft
The formula of an area of a rectangle l × w:
A = lw
Calculate the areas:
A₁ = (7)(8) = 56 ft²
A₂ = (7)(18) = 126 ft²
A₃ = (8)(18) = 144 ft²
The Surface Area :
S.A. = 2A₁ + 2A₂ + 2A₃
Substitute:
S.A. = 2(56) + 2(126) + 2(144) = 652 ft²
Answer:
Step-by-step explanation:
a. 960 / 4 = 240 for 1 grid
1/2 cm = 24000
1 : 48000
b. A to C
AC² = 3² + 6²
AC² = 9 + 36
AC²= 432 + 1728
AC² = 2160
AC = √2160 km