Answer:
b = 2(g + r)
Marisa used b = 8 cups of blueberries.
Step-by-step explanation:
Let g be the cups of green grapes, r be the cups of red grapes, and b be the cups o blueberries Marisa used..
then we know that
g = 1 (Marisa used 1 cup of green grapes)
r = 3 (Marisa used 3 cup of red grapes)
g + r = 4
Marisa used twice as may cups of blueberries as cups of grapes; this means
b = 2(g + r )
b = 2(4) = 8
Marisa used 8 cups pf blueberries.
(3 + 6i)(3 + 7i)
FOIL: First, Outside, Inside, and Last
3 x 3 = 9
3 x 7i = 21i
6i x 3 = 18i
6i x 71= 42i
9 + 21I + 18I + 42I = 9 + 81I
a = 9
B = 81I
Answer:
y = 4.375x + 2.5
Step-by-step explanation:
The equation of the line is expressed as y = mx+c
m is the slope
c is the intercept
Using the coordinate points (0, 2.5), (4, 20)
Slope m = 20-2.5/4-0
m = 17.5/4
m = 4.375
Get the intercept
Substitute (0, 2.5) and m = 4.375 into y - mx+c
2.5 = 4.375(0) + c
2.5 = c
Get the equation required
y = 4.375x + 2.5
Answer: 96 green pens sold
Step-by-step explanation:
Black = 3 pens
Red = 5 pens
Green = 6 pens
--
Black = 7 packs
Red = 2 packs
Green = 4 packs
--
Black = 3 x 7 = 21 total pens
Red = 5 x 2 = 10 total pens
Green = 6 x 4 = 24 total pens
Total units for total pens = 21 + 10 + 24 = 55u
55u = 220
1u = 220/55
= 4
24u = 4 x 24
= 96 green pens sold
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96 green pens were sold.
No a biased sample is not valid
