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egoroff_w [7]
4 years ago
9

Subtract: (-9z-7) – 11z

Mathematics
2 answers:
zaharov [31]4 years ago
8 0

<em>Answer:</em>

<em>- 20z - 7</em>

<em>Step-by-step explanation:</em>

<em>(-9z-7) – 11z = </em>

<em>= -9z - 11z - 7</em>

<em>= -(9z + 11z) - 7</em>

<em>= -(20z) - 7</em>

<em>= - 20z - 7</em>

umka2103 [35]4 years ago
3 0

Answer: -20z-7

Step-by-step explanation:

(-9z-7) – 11z

−9z−7−11z

 (-9z-11z)-7

-20z-7

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)

- Cutiepatutie ☺❀❤

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5/16x20/30 <br> Cancel and simplify
nikitadnepr [17]

Answer: 5/24

Step-by-step explanation:

First:

Reduce fractions where possible.

Then your initial equation becomes:

5/16 * 2/3

Second:

Applying the fractions formula for multiplication,

5*2 and 16*3 = 10/48

Simplifying 10/48, the answer is

5/24

5 0
3 years ago
Find the x intercepts of the parabola with vertex (5,-12) and y intercept (0,63)
nignag [31]

The equation for the standard form of parabola is given as:

y = A (x - h)^2 + k

with (h, k) being the (x, y) coordinates of the vertex

For the given problem, we are given that (h, k) = (5, - 12).
We can then use point (0, 63) for x and y to solve for A
63 = A (0 - 5)^2 - 12
75 = A (25)

A =  75 / 25

A = 3

Equation of given parabola: 
y = 3 (x - 5)^2 - 12


We can now solve for the x –intercept:
Set y = 0, then solve for x

0 = 3 (x - 5)^2 - 12

3 (x - 5)^2 = 12

(x - 5)^2 = 4

Taking sqrt of both sides
x - 5= ±2

x = -2 - 5 = -7 and x = 2 - 5 = - 3
x = -3, -7


Answer:
x-intercepts of given parabola: -3 and -7

(-3, 0) and (-7, 0)

5 0
3 years ago
15 students is 0.50% of<br> __ students.
Sati [7]
15/.005(.50% as a decimal)

3000
To check
3000*.005(again .50% as a decimal)=15
6 0
3 years ago
What are the
BartSMP [9]

Answer:

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Step-by-step explanation:

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4 years ago
Consider a rectangle of perimeter 12 cm. form a cylinder by revolving this rectangle about one of its edges. what dimensions of
vlada-n [284]

Answer:

Dimensions will be 4 * 2 cm.

Step-by-step explanation:

l = length of rectangle and w = width

Perimeter = 2l + 2w = 12

l + w = 6.

---> l = 6 - w

Volume of the cylinder

V = πr^2l

w = 2πr

--> r = w/2π

l = 6 -  w so

V = π(w/2π)^ 2 * (6 - w)

---> V =  w^2/4π (6- w)

---> V = 3w^2/ 2π - w^3/4π

Differentiating:

dV/ dw =  6w/ 2π - 3w^2 / 4π

             =   - 3(w - 4)w / 4π

This equals 0 for maximum volume

- 3(w - 4)w / 4π = 0

w = 0 or w = 4

8 0
1 year ago
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