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ioda
3 years ago
14

How can you use 10% and 20% of an amount to find 15% of anl amount?

Mathematics
1 answer:
beks73 [17]3 years ago
3 0
You just need to know how much 10% is and then you just divided what 10% is and that will be equal to 5% and then you just add the 10 % and 5%
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Please help I’m really lost. This is my final hw.
sleet_krkn [62]

Answer:

A).

{ \tt{first \: rotation = 360 \degree}} \\ { \tt{second \: rotation = 360 \degree}} \\ {  \tt{third \: rotation = 90 \degree + (90 - 60) \degree}} \\ { \tt{third \: rotation = 120 \degree}} \\  \\ { \bf{angle}} = { \tt{ {1}^{st}  \: rotation +  {2}^{nd}  \: rotation +  {3}^{rd}  \: rotation}} \\  = 360 \degree + 360\degree + 120\degree \\  = { \tt{840\degree}}

7 0
3 years ago
A student says that the slope pf the line for the equation y=20-15x is 20 and the y-intercept is 15. Find and correct the error.
Alla [95]
We have this equation for the slope is: y=mx+b which m is the slope and b is the y-intercept, so we have y=20-15x or y=-15x+20, and we already know that the slope is -15 and y-intercept is 20. As a result, the student's error is that he thinks that 20 is the slope because it is the first number. Hope it help!
7 0
3 years ago
Example of an irrational number that is less than 2 and greater than 1.5
disa [49]

For this case, the first thing you should do is take into account the irrational number definition.

An irrational number is one that can not be written as the quotient between two whole numbers.

Their number of decimals is unlimited and they are not periodic.

An irrational number within the specified domain is:

π/2 = 1.570796327    

Answer:

an example of an irrational number that is less than 2 and greater than 1.5 is:

π/2 = 1.570796327  

6 0
3 years ago
Your grandmother wants to spend at least $40 but no more than $60 on school clothes for you. T-shirts sell for $10 and pants sel
ss7ja [257]

she could buy 2 pants and 2 shirts because 2 pants =$40 and 2 shirts=$20 so 40 +20=60

5 0
3 years ago
Solve the system of equations below.
trapecia [35]

Answer:

A) x + y = 8

B) 3x + 2y = 21

We multiply A) by -2

A) -2x -2y  = -16 Then we add this to

B) 3x + 2y = 21

x = 5

y = 3

Second answer is correct

Step-by-step explanation:

5 0
3 years ago
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