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3 years ago

Which expression is equivalent to n + n - 0.18n

Mathematics

1 answer:

Rudiy273 years ago

4 0

Answer:

1.82n

Step-by-step explanation:

We combine like terms to simplify this.

Any variable with no other coefficient can be written with a coefficient of 1. This is because everything can be multiplied by 1 without changing it. This means we have

1n + 1n - 0.18n

Combining like terms, we have

2n - 0.18n = 1.82n

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The sum of two numbers is 12. 3 times the first number decreased by the second number is 24. Find the numbers.

lana [24]

Answer:

9 and 3

Step-by-step explanation:

Let the first number be x and second number be y hence their sum

x+y=12 ......(1)

Making x the subject theb x=12-y

Three times be first number is 3x

3x-y=24.......(2)

Adding the two sets of equations then

4x=36

X=36/4=9

The second number will be 12-9=3

So the first number is 9 and second is 3

6 0

4 years ago

Unit 4: Lesson 9: Parallel and Perpendicular Lines Unit Test

yulyashka [42]

Answer:

where is the questions

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

I WILL GIVE BRAINLIEST Solve for j j/-2 + 7 = -12 j=

Anna [14]

Answer:

j= -38

Step-by-step explanation:

1÷2j+7=-12

j+14=-24

j=-24-14

j=-38

5 0

4 years ago

A 10 inch cookie cake is divided into 8 slices. What is the area of 3 slices

brilliants [131]

Answer:

The area of 3 slices is $\frac{75}{8}\pi\ in^2$ or approximate $29.4\ in^2$

Step-by-step explanation:

Find out the area of the cookie cake

The area of the circle (cookie cake) is

$A=\pi r^{2}$

we have

$r=10/2=5\ in$ ----> the radius is half the diameter

substitute

$A=\pi (5)^{2}$

$A=25\pi\ in^{2}$

Remember that the area of the complete cookie cake subtends a central angle of 360 degrees

If the cake is divided into 8 slices

then

The central angle of each slice is equal to

360/8=45°

The central angle of 3 slices is equal to

3(45°)=135°

By proportion

Find out the area of 3 slices

Let

x ----> the area of 3 slices

$\frac{25\pi}{360}=\frac{x}{135}\\\\x=25\pi(135)/360\\\\x=\frac{3,375}{360}\pi\ in^2$

Simplify

$\frac{75}{8}\pi\ in^2$ ----> exact value of the area of 3 slices

Find out the approximate value of the area of 3 slices

assume

$\pi =3.14$

substitute

$\frac{75}{8}(3.14)=29.4\ in^2$

5 0

4 years ago

when a number is written in scientific notation how can you tell right away weather or not it is greater than or equal to one

lidiya [134]

Right away, you can tell that the number is greater that one if the exponent is positive. For example, 1.23 x 10 to the power of 2 would be 123, which is greater than 1. If the exponent is negative, the answer will most likely be less than 1. For example, 1.23 to the power or -2 would be .0123.

Hope this helps!

4 0

4 years ago