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Ivahew [28]
3 years ago
7

Y-x-4 equals 0. What is the equation written in function notation?

Mathematics
1 answer:
dimaraw [331]3 years ago
5 0

y - x - 4 = 0


y = x + 4


f(x) = x  + 4



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If a varies directly as b, and a = 28 when b = 7, find b when a = 5.
Reika [66]

Answer: Option B.

b=\frac{5}{4}

Step-by-step explanation:

If a varies directly with b then when a increases b it also increases by a factor k.

Then we can write that

a = kb

We know that when a = 28 then b = 7. So

28 = k * 7

k=\frac{28}{7}

k=4

Therefore the equation of proportionality is:

a=4b

So when a=5  then:

5=4b\\\\b=\frac{5}{4}

6 0
3 years ago
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Write an equation in slope-intercept form for the line with y-intercept −5 and slope −2/5
riadik2000 [5.3K]

Answer:

\large\boxed{y=-\dfrac{2}{5}x-5}

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y=mx+b

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<em>b</em><em> - y-intercept</em>

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Substitute:

y=-\dfrac{2}{5}x+(-5)}=-\dfrac{2}{5}x-5

8 0
3 years ago
The value of x for which the expressions 5(3x-4) equal to 2(2x+1)
notsponge [240]

Answer:

the value of x is 2.

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My late response (haha): First, you would write a proportion.

Step 1: 2496 over 48 = x over 31
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Step 2: Cross multiply
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Step 3: Calculate
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Step 4: Divide both sides by 48
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Step 5: Write it as a sentence 
The area of the land that is not fenced is 1612 squared meters. 

Hope that helped! Good luck! :]
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Lynna [10]
I don't know. check google!
8 0
3 years ago
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