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3 years ago

Add -3/8 + 5/4 Simplify your answer. Type a fraction or an interger.

Mathematics

2 answers:

sdas [7]3 years ago

7 0

Beautiful your answer is 7/8

Anton [14]3 years ago

5 0

5/4 - 3/8 = 5*2/4*2 - 3/8 = 10/8 - 3/8= 7/8

The final answer is 7/8 in fraction form. Notice the second step. It brings the 5/4 into eighths by multiplying 5*2 and 4*2. This is done so that the 3/8 and 5/4 have identical denominators.

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The amount and the concentration of a salt solution is given. How much salt would you get if you evaporated all water from this

DiKsa [7]

Answer:

40.5 g

Step-by-step explanation:

Find how much salt is in 450 g of a 9% salt solution.

Note that

450 g - 100%,

x g - 9%,

then

$\dfrac{450}{x}=\dfrac{100}{9},\\ \\x=\dfrac{450\cdot 9}{100}=40.5\ g.$

If you evaporated all water from this solution, then you would get 40.5 g of salt.

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3 years ago

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Use synthetic substitution to find f (-5) for f (x) = x3 – 5x +2.

Sonbull [250]

Answer:

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3 years ago

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3 years ago

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5x + 5 = x + 45<br><br> PLEASE HELP

Ostrovityanka [42]

$5x+5=x+45$

We'd rather not have x on both sides of the equation when trying to solve this. To eliminate the x on the right side, subtract both sides by x.

$5x+5-x=x+45-x$
$4x+5=45$

Let's get eliminate the "5" on the left side. Subtract both sides by 5.

$4x+5-5=45-5$
$4x=40$

To finish this, divide both sides by 4.

$4x \div 4=40 \div 4$
$x=10$

That is the answer. Hope this helps! :)

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4 years ago