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2 years ago

13

If the cost of 10 pencils is $52 1/2 find the cost of 1 pencil

2 answers:

just olya [345]2 years ago

8 0

Answer: $5.25/pencil

Step-by-step explanation:

($52.5)/(10 pencils) = $5.25/pencil

777dan777 [17]2 years ago

3 0

52\10= $5.20 so that is the right answer

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Help fast please <br> -7(w-4)+3w-27

Amanda [17]

Answer:

-4w+1

Step-by-step explanation:

Simplify the expression.

6 0

3 years ago

What is the x-value of the solution to the system of equations?

ValentinkaMS [17]

Answer:

The solution to the system of equations is:

$x=4,\:y=-3$

Step-by-step explanation:

Given the system of equations

$5x + 4y =8$

$2x- 3y = 17$

solving the system of equations

$\begin{bmatrix}5x+4y=8\\ 2x-3y=17\end{bmatrix}$

$\mathrm{Multiply\:}5x+4y=8\mathrm{\:by\:}2\:\mathrm{:}\:\quad \:10x+8y=16$

$\mathrm{Multiply\:}2x-3y=17\mathrm{\:by\:}5\:\mathrm{:}\:\quad \:10x-15y=85$

$\begin{bmatrix}10x+8y=16\\ 10x-15y=85\end{bmatrix}$

$10x-15y=85$

$-$

$\underline{10x+8y=16}$

$-23y=69$

$\begin{bmatrix}10x+8y=16\\ -23y=69\end{bmatrix}$

solve for y

$-23y=69$

Divide both sides by -23

$\frac{-23y}{-23}=\frac{69}{-23}$

$y=-3$

$\mathrm{For\:}10x+8y=16\mathrm{\:plug\:in\:}y=-3$

$10x+8\left(-3\right)=16$

$10x-24=16$

$10x=40$

Divide both sides by 10

$\frac{10x}{10}=\frac{40}{10}$

$x=4$

Thus, the solution to the system of equations is:

$x=4,\:y=-3$

7 0

2 years ago

The volume of an oblique pyramid with a square base is V units3 and the height is h units.Which expression represents the area o

melamori03 [73]

Answer: a) $\dfrac{3V}{h}\ units^2$

Step-by-step explanation:

We know that the volume of an oblique pyramid is given by :-

$\text{Volume}=\dfrac{1}{3}\text{(Base Area x height) }$

If the volume of an oblique pyramid with a square base is V units³ and the height is h units.

Then, we have

$V=\dfrac{1}{3}\text{(Base Area x h) }$

Multiply 3 on both sides , we get

$3V=\text{(Base Area x h) }$

Divide both sides by h , we get

$\dfrac{3V}{h}=\text{Base Area }$

i.e. $\text{Base Area }=\dfrac{3V}{h}\ units^2$

Hence, the expression represents the area of the base of the pyramid = $\dfrac{3V}{h}\ units^2$

Hence, the correct answer is a) 3 v/h units^2

7 0

2 years ago

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If p=1/3 what is 12p

anyanavicka [17]

Step-by-step explanation:

Given

$p \: = \frac{1}{3} \\ 12p \: = 12 \times \frac{1}{3} \\ = 4$

Hope it will help :)

8 0

2 years ago

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How many solutions are there in this equation 8 (x-3)=8x-24

kari74 [83]

Performing the indicated multiplication on the left side gives you:

8x-24=8x-24,

8x=8x

1=1

These expressions are true for any real value of x and thus has infinitely many solutions...

3 0

3 years ago

Read 2 more answers