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2 years ago

9

Guadalupe can do a job in 15 hours. If she works with lan, together they can get the job done in 10 hours. How long would it tak

e lan to do the job alone?

1 answer:

krok68 [10]2 years ago

7 0

Answer:

30 hours

Step-by-step explanation:

The equation we use is 1/15 + 1/x = 1/10. X being the amount of time it takes Ian alone. X works out to 30 hours which is the answer

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Find x so that (x,-14) is a solution to 2x+3y=12

Monica [59]

Answer:

27

Question:

Find $x$ so that $(x,-14)$ is a solution to $2x+3y=12$ .

Step-by-step explanation:

So we are asked to replace $y$ with -14 and solve for $x$ in the equation:

$2x+3y=12$ .

$2x+3y=12$ with $y=-14$ :

$2x+3(-14)=12$

$2x-42=12$

Add 42 on both sides:

$2x=54$

Divide both sides by 2:

$x=27$ .

So the $x$ -coordinate that corresponding to $y=-14$ is $27$ .

Verify that:

$(27,-14)$ is a point satisfying $2x+3y=12$ .

Replace $x$ with 27 and $y$ with -14:

$2(27)+3(-14)=12$

$54+-42=12$

$12=12$ is true so our work must be right.

3 0

3 years ago

Solve 34=j−12<br> .<br> j=<br> Find the value of j

Semenov [28]

Answer:

j=46

Step-by-step explanation:

34=j-12

add 12 to 34 to isolate j

the answer to that is 46

j=46

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2 years ago

(2^8 . 5-5 . 19^-2) . {5^2over2^3} . 2^28 show steps2^28

just olya [345]

Answer:0

Step-by-step explanation:

(2^28•5-5•19^-2)•(5^2 over 2^3)•2^28

(0-0)•((5x5) over (2x2x2))•2^28

0•(25/8)•2^28=0

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2 years ago

The cost of a ticket increases by 10% to £18.15<br> Work out the original cost.

Licemer1 [7]

Answer:

£16.50

Step-by-step explanation:

$x \times (1+\frac{10}{100} )=18.15$

$x \times \frac{110}{100} =18.15$

$\frac{110}{100} x=18.15$

$1.1x=18.15$

$\frac{1.1x}{1.1}=\frac{18.15}{1.1}$

$x=16.5$

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3 years ago

Read 2 more answers

elizabeth and her sister each go to the store to buy a piece of pizza for $1.25 and a soda for $0.85 each. How much do they spen

Radda [10]

11
125
85
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210
2
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420
3
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$12.50

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3 years ago