Answer:
It is D.
Step-by-step explanation:
-4x+y= -9 can be turned into
y= -9 + 4x
5x+2y=3 (plug y in)
5x+2(-9+4x)=3
5x-18+8x=3
5x+8x=3+18
13x=21
divide 13 on both sides
x=1.6
4$ would be the cost of the item
Answer:
See the attached figure which represents the problem.
As shown, AA₁ and BB₁ are the altitudes in acute △ABC.
△AA₁C is a right triangle at A₁
So, Cos x = adjacent/hypotenuse = A₁C/AC ⇒(1)
△BB₁C is a right triangle at B₁
So, Cos x = adjacent/hypotenuse = B₁C/BC ⇒(2)
From (1) and (2)
∴ A₁C/AC = B₁C/BC
using scissors method
∴ A₁C · BC = B₁C · AC
The number of people whose hobby is reading but not riding a motorcycle is 5.
<h3>What is the relative frequency of not riding a motorcycle?</h3>
We want to calculate the number of people whose hobby is reading but they don't like riding the motorcycle,
therefore, when we look into the table we will find out that block A2 is the block that represents the number of people whose hobby is reading but not riding a motorcycle.
Hence, the number of people whose hobby is reading but not riding a motorcycle is 5.
Learn more about Relative frequency:
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