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Ivenika [448]
3 years ago
8

What is the value of x if x/4+2=15Help!​

Mathematics
2 answers:
NNADVOKAT [17]3 years ago
8 0

Answer:

Step-by-step explanation:

because i don't know if the 2 is with the 4 or not I have calculated both.

x/4 + 2 = 15

<=> x/4 = 13

<=> x = 13.4 = 52

x/(4+2) = 15

<=> x/6 = 15

<=> x = 6.15 = 90

pav-90 [236]3 years ago
3 0

Answer:

52

Step-by-step explanation:

\frac{x}{4}  + 2 = 15

The first step is to shift all number values to the right. To do this, subtract 2 from the equation.

This will give

\frac{x}{4}  = 13

Now, multiply the equation by 4.

Hence,

x = 13 \times 4 = 52

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The radius of a right circular cone is increasing at a rate of 2 inches per second and its height is decreasing at a rate of 2 i
Marrrta [24]

Answer:

Rate of change of volume when the radius is 40 inches and the height is 20 inches = 0 inch³/s

Step-by-step explanation:

We have

         \texttt{Volume = }\frac{1}{3}\pi r^2h

Taking derivative with respect to time,

         V=\frac{1}{3}\pi r^2h\\\\\frac{dV}{dt}=\frac{1}{3}\pi \frac{d}{dt}\left (r^2h \right )\\\\\frac{dV}{dt}=\frac{1}{3}\pi \left ( 2r\frac{dr}{dt}\times h+r^2\frac{dh}{dt}\right)

Given that

          r = 40 inches

          h = 20 inches

         \frac{dr}{dt}=2inch/s\\\\\frac{dh}{dt}=-2inch/s

Substituting

        \frac{dV}{dt}=\frac{1}{3}\pi \left ( 2r\frac{dr}{dt}\times h+r^2\frac{dh}{dt}\right)\\\\\frac{dV}{dt}=\frac{1}{3}\pi \left ( 2\times 40\times 2\times 20+40^2\times (-2)\right)\\\\\frac{dV}{dt}=\frac{1}{3}\pi \left (3200-3200\right)=0inch^3/s

Rate of change of volume when the radius is 40 inches and the height is 20 inches = 0 inch³/s

4 0
3 years ago
Tim is building a model of a castle with small wooden cubes. So far, Tim has constructed part of a security wall of the castle,
ioda

Answer:

The length has 9 cube so the length is 9/8 or 1  1/8 ft.

the width has 4 cubes, so the width is 4/8 or 1/2 ft.

The height has 11 cubes, so the height is 11/8 or  1  3/8 ft.

So, the volume of the portion of the security wall that Tim has constructed so far is  99/128 cu ft.

Step-by-step explanation:

5 0
4 years ago
Claire has a hot tub with a diameter of 7 feet. She wants to purchase a cover to protect the hot tub. What is the area
harkovskaia [24]

Answer:

The area  of the cover for the hot tub must be:

  • <u>38 square feet</u>.

Step-by-step explanation:

First, you must understand that since a hydromassage tub is mentioned and the diameter, it is assimilated that it is round in its upper part, which is why the formula is used to find the area of a circle:

  • <u>Area of a circle = pi * radius ^ 2</u> (you must know that the radius is half the diameter)

Since the diameter is mentioned, it can be replaced in the formula:

  • Area of a circle = 3.14 * (3.5 feet) ^ 2
  • <u>Area of a circle = 38,465 square feet. Approximately 38 square feet</u>.
7 0
3 years ago
Read 2 more answers
Solve for x using<br> cross multiplication.<br> 2x + 2 = x-4<br> 11<br> 6<br> x = [?]<br> Enter
kow [346]

you would cross multiply meaning 6(2x+2)=11(x-4) Then you distribute 6 so it would be 12x+12=11x-44 then you have to move the constant and the variable so 12x-11x= -44-12 so then the answer would be x = -56

5 0
3 years ago
Paris has decided to give 1/8 of her perfume to her 3 closest friends.
Dennis_Churaev [7]

Each friend will have 1/24 of her total perfume.

I’m not sure if this is right, because the wording is weird, but if she is giving 1/8 of her perfume to all three friends, and then those friends have to divide that 1/8 among themselves, that is one eighth divided by 3, and that is equal to 1/24

8 0
3 years ago
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