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Vinvika [58]
3 years ago
5

Evaluate the expression 1/2x - 2/3y when x = 4 and y = -3

Mathematics
2 answers:
irinina [24]3 years ago
6 0

Answer:

You just substitute the values of x=4 and y=-3 into the given equation and then answer.

Step-by-step explanation:

\frac{1}{2}  \times (4) - \frac{2}{3} \times  ( - 3)

\frac{1}{2}  \times  \frac{4}{1}  -  \frac{2}{3}  \times  -  \frac{3}{1}

2 - ( - 2)

4

so your answer is 4.

ollegr [7]3 years ago
3 0

Answer:

-1

Step-by-step explanation:

Equation: 1/2x-2/3y

Swap out the x and y with the numbers.

1/2 x 4/1 -2/3 x -3

Solve.

2-3

-1

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4/5 minus 1/3 plz i need help
IRISSAK [1]

Answer:

7/15

Step-by-step explanation:

Step 1

We can't subtract two fractions with different denominators. So you need to get a common denominator. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 4 by 3, and get 12.

Then we multiply 1 by 5, and get 5.

Next we give both terms new denominators -- 5 × 3 = 15.

So now our fractions look like this:

12

15

−  

5

15

Step 2

Since our denominators match, we can subtract the numerators.

12 − 5 = 7

So the answer is:

7

15

Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

Nope! So now we try the next greatest prime number, 7...

Nope! So now we try the next greatest prime number, 11...

No good. 11 is larger than 7. So we're done reducing.

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3 years ago
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