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kow [346]
3 years ago
5

Solve for x and y 9/x-4/y=8

Mathematics
1 answer:
borishaifa [10]3 years ago
7 0
You can solve <span>9/x-4/y=8 for x or for y but NOT at the same time.

Solving for x:  </span><span>9/x-4/y=8       Mult all 3 terms by xy to eliminate the fractions.

9(xy)/x - 4xy/y = 8xy         =>       9y - 4x = 8xy, or 9y = 4x + 8xy = 4x(1+2y)

                                                                        then 9y = x [ 4(1+2y) ]
                                                                                     9y
                                                            therefore x = ------------
                                                                                  4(1+2y)

Solve for y using a similar approach.

</span>
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If you can run 2/5 of a mile in 1/2 hour, how far can you run in 1 1/2 hours?​
forsale [732]

Answer:

1 1/5 or 6/5

Step-by-step explanation:

So you get 2/5 every 1/2 hour so take the amount you have and times it by 3.

5 0
2 years ago
You work for a carpet company. You sell carpets at these prices: 100 square feet for $67, 200 square feet for $130, 400 square f
fredd [130]

Answer: A. $0.60

Step-by-step explanation:

The prices for which the carpets were sold are

1) 100 square feet for $67

2) 200 square feet for $130

3) 400 square feet for $240

4) 800 square feet for $504. We would determine the unit cost per square foot for each of them. It becomes

1) 1 square feet costs 67/100 = $0.67

2) 1 square feet costs 130/200 = $0.65

3) 1 square feet costs 240/400 = $0.6

4) 1 square feet costs 504/800 = $0.63

The unit cost per square foot of carpet for the worst deal is $0.6

4 0
3 years ago
Simplify the expression by combining like terms 2x+8-x+10
svp [43]

Answer:

x+18

Step-by-step explanation:

Let's simplify step-by-step.

2x+8−x+10

=2x+8+−x+10

Combine Like Terms:

=2x+8+−x+10

=(2x+−x)+(8+10)

=x + 18

8 0
2 years ago
The 6 elephants at the zoo have a combined weight of 11,894 pounds. About how much does each elephant weigh?
Sidana [21]

Answer: 14,000 i think

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
A ball is thrown up into the air from a building modeled by the equation:
Arlecino [84]

Answer:

After two seconds

h(2) = -16(2^2) + 115(2) + 19

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Let me know if this helps!

3 0
2 years ago
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