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o-na [289]
4 years ago
5

Simplify (7x2 - 2x + 9) + (3x2 + 15x – 4).

Mathematics
2 answers:
VikaD [51]4 years ago
5 0

Hey! Your answer for this is

7x^2 + 3x^2 = 10x^2

-2x + 15x = 13x

9 - 4 = 5

Hence, 10x^2 + 13x + 5.

Hope this helps!

goldfiish [28.3K]4 years ago
3 0

Answer:

A=10

Step-by-step explanation:

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Mary needs to order pizza for 18 students. Each student should get 1/4 of the pizza. How much pizza will be left over?
Inessa [10]

Answer:

Step-by-step explanation:

Answer:

Order 5 pizza's. There is  

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Explanation:

No matter how you present this, the underlying principle is that of ratio.

If each pupil gets  

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of a pizza the 1 pizza feeds 4 students.

So the ratio of  

pizza count

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Let the count of pizzas be  

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4

=

p

18

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18

×

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×

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18

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18

=

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p

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4 0
3 years ago
I need help again.. please give me a real answer.
Reil [10]
Since the slope intercept form formula is y=Mx+b, your slope will be 3 and your starting point will be 0 because there’s no b. Mx is your slope and b is your y intercept.
3 0
3 years ago
Read 2 more answers
Please help me! i would appreciate it
vagabundo [1.1K]

Answer:

hope this helps

Step-by-step explanation:

part.1

8 0
3 years ago
The radius of a 12 inch right circular cylinder is measured to be 4 inches, but with a possible error of ±0.2 inch. What is the
GuDViN [60]
Given:
r = radius = 4
h = height = 12
dr = error in radius = 0.2

What we want to find
dV = error in volume

Use the derivative to find the differential dV
V = pi*r^2*h
dV/dr = d/dr[ pi*r^2*h ]
dV/dr = 2pi*r*h
dV = 2pi*r*h*dr
dV = 2pi*4*12*0.2
dV = 19.2pi

So if the error in measuring the radius is +-0.2 inches, then the error in the cylinder volume is +-19.2pi cubic inches (we either measure the volume to be 19.2pi cubic inches too big, or 19.2pi cubic inches too small)

----------------------------------------------------------------------------------

Final Answer: Plus or minus 19.2pi cubic inches

Note: your teacher may want you to drop the "plus or minus" part
5 0
3 years ago
Simplify the expression<br> (8-√5)(8+√5)<br> 39<br> 59<br> 64+√5<br> 69+16√5
irakobra [83]
Using the identity a^2 - b^2 = (a - b)(a + b):-

this is 8^2 - (sqrt5)^2  = 64 -  5  = 59 Answer
4 0
4 years ago
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