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3 years ago

2 4/5 x 3 1/8 proper fraction show work

Mathematics

2 answers:

erastovalidia [21]3 years ago

4 0

Answer:

answer is 8 3/4

the formula is in the picture

hope this picture helps

8090 [49]3 years ago

4 0

Answer:

35/4 = 8 3/4 = 8.75

Step-by-step explanation:

14/5 * 25/8 = 14 · 25/5 · 8 = 350/40 = 35 · 10/4 · 10 = 35/4

Multiply both numerators and denominators. Result fraction keep to lowest possible denominator GCD(350, 40) = 10. In the next intermediate step , cancel by a common factor of 10 gives 35/4.

In words - fourteen fifths multiplied by twenty-five eighths = thirty-five quarters.

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One printing press can print the whole school newspaper in 12 hours, while another press can print in 18 hours. How long will th

rusak2 [61]

Answer:

7 Hours 12 Minutes

Step-by-step explanation:

So they one of the printer increases at a rate of 1/12 and the other increases at a rate of 1/18. Since you don't know the time it actually takes, you will replace both numerators with and x. (x/12 and x/18). You want to set these up so that they are adding. (x/12 + x/18=1). Since you're adding, you want to change it to the same denominator. The lowest is 36 so you multiply x/12 by 3/3 (so you don't unbalance the equation) and x/18 by 2/2. You'll end up with 3x/36 + 2x/36= 1 which will simplify to 5x/36=1. Multiply each side by 36 to leave the variable by itself. It becomes 5x=36 and when you divide it by 5 you get 7.2. So it's seven and .2 hours, which is equivalent to7 and 1/5 of an hour or 7 hours and 12 minutes.

8 0

3 years ago

Craig went out to a restaurant for dinner. He tipped 16% of his bill, which brought the sum of the dinner bill plus the tip to $

alexira [117]

$22.50

You can get this by dividing the new total by 116%, which is how much of the bill was paid.

4 0

3 years ago

the plans for your 13th birthday party are well under way. your parents agree to your guest list of 400 people. you decided it w

diamong [38]

Answer:

11 people will get both the prizes.

Step-by-step explanation:

In this question we need to find common integral multiples of 5 and 7 under 400. As you can see in the figure 35th person is the first one to get both ipod and psp. The LCM (least common multiple) of 5 and 7 which is 35 (!!! I hope you know how to LCM of two integers ).

Therefore the integral multiples of 35 will be same as the common multiples of 5 and 7. So, figuring out the number of integral multiples of 35 under 400 will give the answer.

To do that divide the number 400 with 35. On performing the division the quotient will be 11 and the remainder will be 15.

Therefore 11 persons out of 400 will get both the prizes.

Similarly if you want to find the number of person getting ipod then divide 400 with 5. The quotient will be 80. ∴ 80 people will get ipod.

And for psp, divide 400 with 7. The quotient will be 57. ∴ 57 people will get psp.

In these divisions, consider just the quotient, here remainder is of no use.

5 0

3 years ago

WILL GIVE THANKS, BRAINIEST, AND 5 STARS! PLEASE HELP!

Andrew [12]

Answer:

a = $\frac{1}{2}$ , b = 5, and $\frac{2b}{a}$ = 20

Step-by-step explanation:

f(x) = - x² + b, x ≤ 0 You would use this equation for f(-2). Since -2 is less than 0.

f(x) = - x² + b, x ≤ 0 ← You can ignore the x ≤ 0 part.

f(-2) = - (-2)² + b Input the value -2 as x. The question states that f(-2) =1.

1 = - (-2)² + b So switch f(-2) with 1 on the left side only.

1 = - (4) + b Simplify. Do the exponents first, so (-2)² = 4.

1 = - 4 + b

+4 +4 Do inverse operations

5 = b

Next,

f(x) = 2ax +3, x > 0 You would use his equation for f(2). Since 2 is greater than 0.

f(x) = 2ax +3, x > 0 ← You can ignore the x > 0 part.

f(2) = 2a(2) + 3 Input the value 2 as x.

f(2) = 4a +3 Simplify. The equation states f(2) = 5. So switch f(2) with 5

5 = 4a +3 on the left side only.

-3 - 3 Do inverse operations

2 = 4a

$\frac{2}{4}$ = $\frac{4a}{4}$ Divide 4 on both sides to isolate the variable a

$\frac{2}{4}$ = a Simplify

$\frac{1}{2}$ = a

Then,

The second part says to find $\frac{2b}{a}$

$\frac{2b}{a}$

$\frac{2(5)}{(\frac{1}{2}) }$ Input both the values of a and b

$\frac{10}{\frac{1}{2} }$ Simplify

20.

The answer for a is $\frac{1}{2}$ , the answer for b is 5, and the answer for $\frac{2b}{a}$ is 20.

6 0

3 years ago

Which of the following is the sum of the polynomials 5x^2-4x+1 and -3x^2+x-3??

Katyanochek1 [597]

5x^2-4x+1 + -3x^2+x-3= 2x^2-3x-2

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3 years ago