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3 years ago

7

Return to the original problem. PEMDAS says to multiply before adding. But could you have performed a different operation and st

ill have gotten a correct answer? Which one? Explain.
(4x2 + 8x + 15) + (x2 − x − 27) − (x + 5)(x − 7)

1 answer:

Brrunno [24]3 years ago

3 0

Answer:

no

Step-by-step explanation:

Because PEMDAS is something you MUST follow no matter WHAT!!!!!!!!

Period pooo

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A manufacturing operations consists of 12 operations. However, five of the 12 machining operations must be completed before any

shutvik [7]

Answer:

604800 possibilities

Step-by-step explanation:

There are two sets.

The first set is for the first five machining operations. This set has the following operations: A,B,C,D,E

The first operation to be made can be any of them(A,B,C,D,E). The second will be any of the four remaining ones, the third will be any of the three remaining and so on...

So for the first set there are 5*4*3*2*1 = 5! = 120 possibilities.

Now for the second set, the same logic is applied.

There will be 7*6*5*4*3*2*1 = 7! = 5040 possibilities.

Now taking into account all the 12 operations, separated by set, there will be 120*5040 = 604800 possibilities.

You can understand this calculus as that for a simple possibility of the first set, there are 5040 possibilities of the second set. The are 120 possiblities in the first set, so we have the multiplication in the paragraph above.

4 0

3 years ago

Another way to write g(h(x)) is<br><br> (gOh)(x)<br> (hog)(x)

o-na [289]

Answer:

A. Another way to write g(h(x)) is (g×h)(x)

Step-by-step explanation:

Hope this helps!

If not, I am sorry.

7 0

1 year ago

Stacy and Neil painted 280 ft2 of their living room wall with 45 gallon of paint. How many square feet can they paint with 3 gal

Alecsey [184]

Answer:

They can paint 18. 66 sq ft with 3 gallons of paint.

Step-by-step explanation:

Total area painted = 280 sq ft

Total gallons of paint used = 45

So, 45 gallons of paint painted 280 sq ft.

⇒ By UNITARY METHOD,

1 gallon of paint paints $(\frac{280}{45} )$ sq ft

So, area painted by 1 gallon = 6.22 sq ft

⇒ area painted by 3 gallon = 6.22 sq ft x 3 = 18. 66 sq ft

So, they can paint 18. 66 sq ft with 3 gallons of paint.

4 0

4 years ago

Pls help! The price of an item has dropped to

murzikaleks [220]

The percentage decrease is 60% decrease because it changed by 81 and 81 is 60% of 135

4 0

3 years ago

Which of the following points solves the system shown below?

IrinaVladis [17]

Answer:

(3,6)

Step-by-step explanation:

Collect like terms

y -5x = -9

y + 2x = 12

Using elimination method

Subtract equation 2 from equation 1

y - 5x = -9

y + 2x = 12

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

0. -7x = -21

Divide both sides by -7

-7x = -21

---- -----

-7 -7

x = 3

Substitute x=3 into equation 1

y = 5(3) - 9

y = 15 - 9

y = 6

Solution is (x,y) = (3,6)

6 0

3 years ago