All categories

3 years ago

2 and 1/3 + 1.5x = 12.3. What is x?

Mathematics

1 answer:

tangare [24]3 years ago

3 0

(I'm not totally sure but there may be someone else with a more accurate/correct answer.)

Here is what I got (Red represents my work, blue represents to follow which steps and highlighter represents what the answer is):

You might be interested in

The sum of 3y and 5 is 47

Daniel [21]

if 3y + 5 = 47

then

y=14

7 0

2 years ago

The Hoover Dam generates an average of about 11,506,000 kilowatt-hours of electricity per day.

OLEGan [10]

Answer:

161,084,000

Step-by-step explanation:

7 x 11,506,000 = 80,542,000

80,542,000 x 2 = 161,084,000

6 0

2 years ago

The average value of two positive numbers is 30% less than one of the two numbers. By which percentage is average value bigger t

Viefleur [7K]

Answer:

75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

So:

$Average = \frac{x + y}{2}$

And:

$Average = (1 - 30\%) * x$ -----30% less than x

Substitute $Average = (1 - 30\%) * x$ in $Average = \frac{x + y}{2}$

$\frac{x + y}{2} = (1 - 30\%) * x$

$\frac{x + y}{2} = (1 - 0.30) * x$

$\frac{x + y}{2} = 0.70 * x$

$\frac{x + y}{2} = 0.70x$

Cross multiply

$x + y = 0.70x * 2$

$x + y = 1.40x$

Collect like terms

$1.40x - x = y$

$0.40x = y$

Make x the subject

$x = \frac{y}{0.40}$

$x = 2.50y$

So, the average is:

$Average = (1 - 30\%) * x$

$Average = (1 - 30\%) * 2.50y$

$Average =0.70 * 2.50y$

$Average =1.75y$

Rewrite as:

$Average =(1 + 0.75)y$

Express as percentage

$Average =(1 + 75\%)y$

This means that the average is 75% bigger than the second number

6 0

2 years ago

When calculating for volume, you use the area of the 2D shape. <br><br> True or false.

Nana76 [90]

Answer:

I think true.

Step-by-step explanation:

Whereas the basic formula for the area of a rectangular shape is length × width, the basic formula for volume is length × width × height.

5 0

2 years ago

Read 2 more answers

Quiz due today! Please help me. No links! 10 points

REY [17]

Answer: you have to use d=rt to figure it out. that is distance equals to rate times time

Step-by-step explanation:

hope that helps

5 0

2 years ago

Read 2 more answers