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konstantin123 [22]

3 years ago

14

a crafter wants to make 20% profit on the items he makes. if the cost of materials is $1.20, what should the items sell for to m

ake a 20% profit?

1 answer:

Alborosie3 years ago

8 0

The crafter should sell his crafts for $6

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143=7+8(3-7x) solve and justify

Llana [10]

Justify means plug answer in and verify

so distribute 8(3-7x)=24-56x

143=7+24-56x
143=31-56x
minus 31 both sides
112=-56x
divide both sides by -56
-2=x

justify

plug it back
143=7+8(3-7x)
143=7+8(3-7(-2))
143=7+8(3-(-14))
143=7+8(3+14)
143=7+8(17)
143=7+136
143=143

true

x=-2

7 0

3 years ago

Lisa drinks 20 fl oz of water after she runs 1 mile. She wants to make a table to see how much water she will need to drink as s

jeyben [28]

Answer:

20=1

She drinks 20 fl oz per 1 mile she runs.

5x20=100

Your answer is C) 100.

6 0

3 years ago

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Zane is putting the strings on 5 harps. Each harp has 48 strings.

krek1111 [17]

Zane needs 240 strings

5 0

3 years ago

What is the derivative of w=(t^2+1)^100<br><br> How is it 200t(t^2+1)^99?

GuDViN [60]

(t^2+1)^100

USE CHAIN RULE

Outside first (using power rule)

100*(t^2+1)^99 * derivative of the inside

100(t^2+1)^99 * d(t^2+1)

100(t^2+1)^99 * 2t

200t(t^2+1)^99

6 0

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PLZ HELP ME BY THE END OF THE DAY

nlexa [21]

$3x^{2} +1=28$

Step 1 : subtract 1 from both sides

$3x^{2} =27$

Step 2 : Divide both sides by 3

$\frac{\frac{3x^{2} }{3} }{\frac{27}{3} }$

$x^{2} = 9$

Step 3 : Find the square root of 9

$\sqrt{9} = 3$

x= (-3,3)

remember negative × negative = positive

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3 years ago