I need help on 11 and 12.
1 answer:
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Answer: B.
Step-by-step explanation:
Let's solve your system by elimination.
4x−2y=8;−2x+2y=6
Add these equations to eliminate y:
4x-2y=8
-2x+2y=6
2x=14
Substitute 7 for x in 4x−2y=8:
(4)(7)−2y=8
−2y+28=8 (Simplify both sides of the equation)
−2y+28+−28=8+−28 (Add -28 to both sides)
−2y=−20
−2y/−2=−20/−2 (Divide both sides by -2)
y=10
Ginny needs cups of sugar to make 36 cookies.
Step-by-step explanation:
Given,
Sugar cups required for 24 cookies =
Ratio of sugar cups to cookies =
Let,
x be the number of cups needed for 36 cookies.
Ratio of sugar cups to cookies =
Using proportion;
Ratio of sugar cups to cookies :: Ratio of sugar cups to cookies
Product of mean = Product of extreme
Dividing both sides by 24
Ginny needs cups of sugar to make 36 cookies.
Keywords: fraction, proportion
Learn more about fractions at:
#LearnwithBrainly
πAnswer:
Therefore, the area of a sector of a circle would be 13.5π square units.
Step-by-step explanation:
Given
mi
- Ф = 60°
The area of a sector of a circle is:
A = π r² Ф/360
A = π (9)² 60/360
A = π 81 * 1/6
A = 13.5π square units
Therefore, the area of a sector of a circle would be 13.5π square units.