2 years ago

What is the value of x in the equation 3x - 4y=65, when y=4?

Mathematics

1 answer:

grigory [225]2 years ago

7 0

Answer:

Step-by-step explanation:

Given 3x-4y=65

Y=4

So 3x-4×4=65

3x-16=65

3x=65+16

X=81/3

X=27

So value of X is 27

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2 years ago

If my rounded number is 9.7 what could the original number have been

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1 year ago

Complete the sequence <br> 3, -6, 12, -24 , 48

scoundrel [369]

3*-2=-6

-6*-2=12

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2 years ago

Read 2 more answers

Lee is thinking of two Numbers,the product is 18. the quotient is 2

defon

X, y - the numbers

The product is 18.
$xy=18$

The quotient is 2.
$\frac{x}{y}=2 \ \ \ |\times y \\
x=2y$

Substitute 2y for x in the 1st equation:
$2y \times y=18 \\
2y^2=18 \ \ \ |\div 2 \\
y^2=9 \\
y=\pm \sqrt{9} \\
y=3 \ \lor \ y=-3 \\ \\
x=2y \\
x=2 \times 3 \ \lor \ x=2 \times (-3) \\
x=6 \ \lor \ x=-6 \\ \\
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The numbers are 6 and 3 or -6 and -3.

6 0

2 years ago

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Han buys an item with a normal price of 15$ and uses a 10% off coupon. How much does he save by using the coupon

valina [46]

Answer: $1.50

Step-by-step explanation:

The item's normal price is $15.

Han uses a 10% off coupon so he saves 10% which is:

= 15 * 10%

= $1.50

He therefore bought the item for $8.50.

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2 years ago