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3 years ago

4/5 + 3/4 =

Mathematics

1 answer:

marshall27 [118]3 years ago

5 0

The topics you should learn are equating denominators and fractions. This is summing up simple fractions.

So we have to make denominators' numbers the same in order to sum up them all (we can sum fractions if the denominators are the same) , and we did it by cross product (that thing on the picture)

Equating by lcm (least common multiple) is the easiest way, because you might see bigger numbers on other questions, and cross product will bring much bigger numbers, so this technic might confuse you.

By the way lcm of 4 and 5 is already 20

Hope it helps!

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A church building fund has $3.2 million in it, which is 60% of the amount necessary for the project. What

Alexandra [31]

Answer:

$5.4 Million

Step-by-step explanation:

3.2 mill/x = 60/100

3.2 mill x 100 = 60x

320 mill = 60x

x = 5.3333 million, rounded up to 5.4 million

5 0

2 years ago

Whats the answer for 6n+7-2n-14=5n-1

12345 [234]

Answer:

Simplifying

6n + 7 + -2n + -14 = 5n + 1

Reorder the terms:

7 + -14 + 6n + -2n = 5n + 1

Combine like terms: 7 + -14 = -7

-7 + 6n + -2n = 5n + 1

Combine like terms: 6n + -2n = 4n

-7 + 4n = 5n + 1

Reorder the terms:

-7 + 4n = 1 + 5n

Solving

-7 + 4n = 1 + 5n

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-5n' to each side of the equation.

-7 + 4n + -5n = 1 + 5n + -5n

Combine like terms: 4n + -5n = -1n

-7 + -1n = 1 + 5n + -5n

Combine like terms: 5n + -5n = 0

-7 + -1n = 1 + 0

-7 + -1n = 1

Add '7' to each side of the equation.

-7 + 7 + -1n = 1 + 7

Combine like terms: -7 + 7 = 0

0 + -1n = 1 + 7

-1n = 1 + 7

Combine like terms: 1 + 7 = 8

-1n = 8

Divide each side by '-1'.

n = -8

Simplifying

n = -8

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Jean lives about 10 miles from the college where she plans to attend a 10-week summer class. There are two main routes she can t

jeka57 [31]

Answer:

We would advise her to choose Country Route because in this route time consistent between 15 and 18 minutes.

Step-by-step explanation:

We are given that Jean lives about 10 miles from the college where she plans to attend a 10-week summer class. There are two main routes she can take to the school, one through the city and one through the countryside.

Jean sets up a randomized experiment where each day she tosses a coin to decide which route to take that day. She records the following data for 5 days of travel on each route.

Country Route - 17, 15, 17, 16, 18 (in minutes)

City Route - 18, 13, 20, 10, 16 (in minutes)

Now, we have to decide which route is better for Jean to go to college.

As we can see from the data that the Country route timings is consistent between 15 to 18 minutes which means most of the times she will reach college between these minutes only.

While on the other hand, we can observe that City route timings are very much consistent as it has a low value of 10 minutes and high value of 20 minutes which means Jean can't be sure that at which time she will reach college.

Hence, we would advise her to choose Country route.

7 0

3 years ago

Miguel has a painting that is 4 inches wide by 2 feet long. He made an enlarged copy of it. The enlarged copy is 1 foot wide. Wh

ahrayia [7]

The length of the enlarged copy in feet is 2.7 feet.

<u>Step-by-step explanation</u>:

The painting is 4 inches wide and 2 feet long.
convert inches into feet (1 inch=0.083 foot). Therefore, 4 inches=0.3 feet
The enlarged copy is 1 foot wide and 'x' feet long.

The width is enlarged from 0.3 to 1 which is increased by 0.7 feet.

∴ The length should also be increased by 0.7 feet = 2+0.7 = 2.7 feet

8 0

3 years ago

What is the surface area of the box if it is scaled up by a fraction of 10

ryzh [129]

Surface area will be 150

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3 years ago