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4 years ago

What is 2(x + 4)=2(-8- x) - 2x

Mathematics

1 answer:

Maru [420]4 years ago

6 0

Answer:

You want to solve for x, the first thing you need to do is distribute

The 2 through the x+4 then the other 2 through the -8-x

2(x+4)= 2x+8

2(-8-x)= -16-2x

2x+8=-16-2x-2x (combine like terms on the right side)

2x+8=-16-4x (now subtract 8 from each side)

2x=-24-4x (8-8=0, -16-8=-24) (now add 4x to each side)

6x=-24 (-4x+4x=0, 2x+4x=6x), (divide each side by 6)

x=-4 (6/6=1, -24/6=-4)

x=-4

Hope this helps ;)

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If the angle opposite of the height of a right angle triangle is 15 degrees and the base is 215 cm how much is the height of the

prisoha [69]

Answer:

86.1

Step-by-step explanation:

because if it it trigonometry u do the inverse operation of tan

so its tan-1 (215/15)

=86.0090869

if u want to round to 3sf its 86.1

hope it helped

5 0

3 years ago

There is 75 gallons of water into the pool every hour if the pool can hold 6,750 gallons how long will it take to fill the pool?

Andreyy89

Answer:

90 hours

Step-by-step explanation:

The rate at which water enters the pool is

75 gallons

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

1 hour

This is equivalent to

1 hour per 75 gallons, leading to:

1 hour

-------------------- * 6,750 gallons = 90 hours

75 gallons

3 0

3 years ago

Please someone help me out. I beggggg

bezimeni [28]

Answer:

1. 144 2. 16 3. 1 4. 3x-6

Step-by-step explanation:

So think of this as a function in a function. So you work from the inside to the outside. So for problem 1, we start with f(4)) [you read it "f of 4"] so what is the solution when x = 4, since f(x) means the function of x so f(4) means 'the function of 4' inside f(x).

Since f(x) = 3x then f(4) = 3(4) [notice how you substitute the 4 everywhere you see a letter x]

so f(4) = 12, now you work the next part h(f(4)) since f(4)=12 then h(12)

So take the h(x) function which is h(x) = $x^{2}$ then h(12) = $12^{2}$ so h(12) = 144