All categories

2 years ago

What expression is equivalent to 3(5+4)? A)15+12 B)15+4 C)8+7 D)8+4

Mathematics

2 answers:

valentina_108 [34]2 years ago

6 0

Answer:

A)15+12

hope it helps...

m_a_m_a [10]2 years ago

4 0

15+12

You need to distribute the 3 to the numbers inside the parentheses. 3*5=15, and 3*4=12. Therefore, it is equivalent to 15+12

You might be interested in

All the while the dog sat in the snow, its wolf-brush of a tail curled around warmly over its forefeet, its wolf-ears are forwar

nalin [4]

Answer:21

Step-by-step explanation:

4 0

3 years ago

A decorative window is made up of a rectangle with semicircles at either end. The ratio of AD to AB is 3:2 and AB is 30 inches.

scZoUnD [109]

Answer: The required ratio will be

$84:1034$

Step-by-step explanation:

Since we have given that

Ratio of AD to AB is 3:2

Length of AB = 30 inches

So, it becomes

$2x=30\\\\x=\frac{30}{2}=15\ inches$

So, Length of AD becomes

$3x=3\times 15=45\ inches$

Now, at either end , there is a semicircle.

Radius of semicircle along AB is given by

$\frac{30}{2}=15\ inches$

So, Area of semicircle along AB and CD is given by

$2\times \frac{\pi r^2}{2}\\\\=\frac{22}{7}\times 15\times 15\\\\=\frac{4950}{7}\ in^2$

Radius of semicircle along AD is given by

$\frac{45}{2}=22.5\ inches$

Area of semicircle along AD and BC is given by

$2\times \frac{1}{2}\pi r^2\\\\=\frac{22}{7}\times \frac{45}{2}\times \frac{45}{2}\\\\=\frac{445500}{28}\ in^2$

And the combined area of the semicircles is given by

$\frac{4950}{7}+\frac{445500}{28}\\\\=\frac{465300}{28}\ in^2$

Area of rectangle is given by

$Length\times width\\\\=AD\times AB\\\\=45\times 30\\\\=1350\ in^2$

Hence, Ratio of the area of the rectangle to the combined area of the semicircles is given by

$1350:\frac{465300}{28}\\\\=1350\times 28:465300\\\\=37800:465300\\\\=84:1034$

Hence, the required ratio will be

$84:1034$

8 0

2 years ago

every 1/2 mile along a hiking path there is water fountain, every 1/4 mile there is a bench, and every 1/8 mile there is a marke

defon

Bench and mile marker

7 0

3 years ago

A spinner is divided into five colored sections that are not of equal size: red, blue, green, yellow, and purple. The spinner is

kakasveta [241]

Answer:

10/54 = 0.185

8 0

2 years ago

Parking at a large university has become a very big problem. University administrators are interested in determining the average

Oduvanchick [21]

Answer:

The 260 students that are followed.

Step-by-step explanation:

According to the situation explained in the question, the university administration is trying to collect data on the students' parking times to figure out a solution for the parking problem in the university.

After following and collecting data from 260 students, the population of interest to the university administration should be the all 260 students that the data is collected from because population of interest describes a "population" that are being studied and having data collected from them.

I hope this answer helps.

7 0

3 years ago