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3 years ago

7x - 4 = 24 show your work

Mathematics

2 answers:

Debora [2.8K]3 years ago

4 0

Move -4 to the other side
7x=24+4
7x=28
x=4

Charra [1.4K]3 years ago

3 0

Answer: x = 4

Explanation: so 7 times what equals 28? 4 right? Then you subtract 28 by 4 and you get 24.

So there’s your answer, answer is 4.

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A rectangular box has the dimensions shown in the diagram. The volume of the box is given by the function V(x) = x3 – 4x, where

marta [7]

Answer:

$Height =3$

Step-by-step explanation:

Given

$Length = x + 2$

$Width = x - 2$

$Height = x$

$Volume = 15$

Required

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The volume is calculated as thus:

$Volume = Length * Width * Height$

This gives

$15 = (x + 2) * (x - 2) * x$

Apply difference of two squares

$15 =(x^2 - 4 ) * x$

$15 = x^3 - 4x$

Subtract 15 from both sides

$x^3 - 4x - 15 = 0$

Using a calculator to factorize, we have:

$(x-3)(x^2+3x+5) = 0$

Split

$x - 3 = 0$ or $x^2 + 3x + 5 = 0$

$x = 3$ or $x^2 + 3x + 5 = 0$

x has complex roots for $x^2 + 3x + 5 = 0$

Hence:

$x = 3$

Recall that:

$Height = x$

$Height =3$

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3 years ago

The difference of a number and thirty-six is seven. Algebraic expression

sleet_krkn [62]

Answer:

x-36=7

Step-by-step explanation:

x-36=7

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3 years ago

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AfilCa [17]

Answer:

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Step-by-step explanation:

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2 years ago

If you have to pay $29.00 per month for a membership, but get 20% off when you pay upfront. How much would you have to pay each

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3 years ago

Jj sell tablets at a store. He earns $180 a week plus$15 for ever tablet he sells. Jj earns $315 last week. Write a equation tha

NeTakaya

So Jj earns a flat rate of 180 per week and an extra 15 per tablet he has sold
so what we need to do is subtract his flat rate(180) from his total(315)
315
-180
____
135 So now we know how much money Jj has earned from selling tablets. But we still need to create an equation and find out how many he has sold.
So we know he get $15 per tablet so 135÷15=9
now we know he has sold 9 tablets
Bu what is our Equation?
well, what were the steps?
TP = total pay
FR= Flat rate
C= Computer profit
PPC= price per computer
#C = number of computers

#C = TP-FR=C C÷PPC=#C
can we simplify this further?
#C = C÷PPC
lets do this:
#C= x
C= y
PPC= z
So: (X = Y÷Z)

8 0

3 years ago

Read 2 more answers