Ask question

Ask question

All categories

zhannawk [14.2K]

3 years ago

14

Andre received and spent money in the following ways last month. For each example, write a positive or negative number to repres

ent the change in money from his perspective.
His uncle gave him $25 as a present.

1 answer:

Komok [63]3 years ago

4 0

Step-by-step explanation:

Let the amount of money Andre has be $A.

You might be interested in

Which of the following numbers is rational but not an integer <br> A.0<br> B.3<br> C.-9<br> D.-4.3

Mashutka [201]

Answer:

Thus, every integer is a rational number. Clearly, 3/2,-5/3, etc. are rational numbers but they are not integers. Hence, every integer is a rational number but a rational number need not be an integer.

Step-by-step explanation:

7 0

3 years ago

Mr. Hans wants to give an award to the student with the best jump rope rate. Linda can jump rope 120

Gelneren [198K]

Answer:

c) Mike receives the award for being the best at jumping rope.

Step-by-step explanation:

Here, according to the question

Jumping rate of Linda = 120 times in 4 minute

So, number of jumps Linda does per minute = (120/4) = 30

So, Jumps per minute of Linda is 30.

Jumping rate of Carl = 315 times in 9 minute

So, number of jumps Carl does per minute = (315/9) = 35

So, Jumps per minute of Carl is 35.

Jumping rate of Mike = 252 times in 7 minute

So, number of jumps Mike does per minute = (252/7) = 36

So, Jumps per minute of Linda is 36.

Now if we compare the <u>jumps per minute</u> of Linda , Carl and Mike, weget that Mike has the best rate of 36 jumps per minute.

Hence, Mike receives the award for being the best at jumping rope.

4 0

3 years ago

For every 13 birds born at the zoo there are two animals born. There were 44 if you were animals born last month then birds so h

Daniel [21]

The ratio birds : animals = 13 : 2
so for every 1 animal, 6.5 birds were born

last month: animals = birds - 44
birds - animals = 44
use trial and improvement to find:
if there were 52 birds, there must be 8 animals
CHECK: 52 - 8 = 44

4 0

3 years ago

Which math expression represents the phrase?

fiasKO [112]

"The sum of a number and 7"
Sum implies addition.
We would write this part as <em>n + 7</em>.

Then we would write the "9 times" part in like this:
<em>9 </em><em>·</em><em> </em><em>(n + 7)</em><em>
</em>We can't write just 9 · n + 7 without the parentheses, because then we would be multiplying just 9 and n instead of 9 and the sum of n and 7. (order of operations says we must do multiplication first)

5 0

3 years ago

Find the area of the shaded part of the figure. Will mark brainliest! 15 pts

Leona [35]

Answer:25sqrt3-25pi/3

Step-by-step explanation:

Assuming the triangle is equilateral, we clearly need to find the radius of the circle, and subtract from the entire area of the triangle.

First, the area of an equilaterail triangle is given by the formula s^2 *sqrt3/4.

Next, the connect the center of the radius to points of tangency. Note this bisects the angle of the equilateral triangle into a 30 degree angle, and connecting radii to points of tangency forms a 90 degree angle, so this is a 30-60-90 triangle. This bisects the side length of the triangle, and the ratio of sides of a 30-60-90. Set this length as x. Thus, we have 4x^2=x^2+25, so 3x^2 =25. Dividing both sides by 3, we get x^2=25/3. Note that we only need x^2, as the formula is x^2 * pi. Hence, the area of the shaded region is 25sqrt3-25pi/3.

8 0

3 years ago

Read 2 more answers