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2 years ago

What is the value of x in the equation 3x – 4y = 65, when y = 4? the answer is x=27

1 answer:

7 0

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

Simple...plug n chug..

3x-4(4)=65

3x-16=65

Now, isolate the variable, x....

3x-16=65
+16 +16

3x=81

Now, divide,

$\frac{3x}{3} = \frac{81}{3}$

x=27.

Thus, your answer.

You might be interested in

What is the best approximate solution of the system of linear equation y=1.5x - 1 and y=1

kiruha [24]

1 = 1.5x -1
+1 +1
2 = 1.5x
/1.5 /1.5
4/3 = x

y = 1.5 ( 4/3 ) -1
y = 1

solution:
x = 4/3
y = 1

6 0

2 years ago

A rectangular picture measures 6 inches by 9 inches. If a copy machine makes each of the two dimensions 1+1/3 larger, what is th

TiliK225 [7]

The percent increase in area of the picture is 40.33%

Step-by-step explanation:

Original area of the rectangular picture that measures 6 in by 9 in will be

Area= L*W

Area= 6*9= 54 in²

Increasing the dimensions by 1+ 1/3 larger will be

6+1+1/3 = 22/3

9+1+1/3=31/3

New area= 22/3 * 31/3 =682/9 = 75.78 in²

Increase in area = 75.78 - 54 = 21.78

Percent increase in area= percent increase/original area *100

Percent increase in area= 21.78/54 *100 = 40.33%

Learn More

Area of a rectangle : brainly.com/question/10865708

Keyword : rectangle, area, percent increase

#LearnwithBrainly

6 0

2 years ago

Old Mc Donald raises ducks and cows. The animals have a total of 100 heads and 354 feet. How many ducks and how many cows does O

dlinn [17]

Answer:

The number of ducks Old Mc Donald raises are 23 and the number of cows Old Mc Donald raises are 77.

Step-by-step explanation:

We are given that Old Mc Donald raises ducks and cows. The animals have a total of 100 heads and 354 feet.

Let the number of ducks Old Mc Donald raises be 'x' and the number of cows Old Mc Donald raises be 'y'.

So, according to the question;

The first condition states that the animals have a total of 100 heads, that means;

$x+y=100$

$x=100-y$ -------------------- [equation 1]

{because one head of a duck and one head of cow}

The second condition states that the animals have a total of 354 feet, that means;

$2x+4y=354$

$x+2y=177$ --------------- [equation 2]

{because there are two feet of a duck and four feet of cow}

Now, putting the value of x in equation 2 we get;

$100-y+2y=177$

$y=177-100$

y = 77 cows

Putting this value of y in equation 1 we get;

x = 100 - y

x = 100 - 77 = 23 ducks

Hence, the number of ducks Old Mc Donald raises are 23 and the number of cows Old Mc Donald raises are 77.

4 0

2 years ago

Pls help ;-; Student #3:

Setler79 [48]

Solved the inequality correctly and graphed their solution correctly.

8 0

2 years ago

Read 2 more answers

Gabe and Eugenia bought a house! Their loan is for $117,000 , for 15 years at an annual interest rate of 4% . This results in a

cupoosta [38]

Answer:

Principal element is $475.43

Interest payment is $390

Step-by-step explanation:

The amount of interest paid in month one is 4%*$117,000*1/12=$390

The interest is calculated based on the annual interest rate of 4% apportioned to reflect one month interest by multiplying by 1/12

The principal element of monthly payment is the monthly payment minus interest.

principal paid in month one=$865.43-$390=$475.43

Ultimately,$475.43 goes toward reducing her loan balance while the $390 is interest on loan

4 0

2 years ago