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Svetradugi [14.3K]
3 years ago
14

What is -18 + (-45) + 12

Mathematics
2 answers:
alexgriva [62]3 years ago
6 0

Answer:

-51

Step-by-step explanation:

hope it helps you! good luck!

qaws [65]3 years ago
5 0
The answer is -51, hope this helps
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THE RATIO OF ANNUAL INCOMES OF A AND B IS 4 :3 AND THEIR ANNUAL EXPENDITURE IS 3 :2 IF EACH OF THEM SAVES SHILLINGS 1000 A YEAR
pickupchik [31]

<u>Answer:</u>

Annual Income of A=4x=4*1000=4000

and

Annual Income of B=3y=3*1000=3000

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

<u>Given Data:</u>

Ratio of annual income of A and B=4:3

Ratio of expenditures of A and B=3:2

Saving of A and B=1000

<u>Required:</u> Annual Income of A and B=?

<u>Solution:</u>

If ratio of income of A and B is 4:3

then let Income of A=4x and Income of B=3x

If ratio of expenditure of A and B is 3:2

then let expenditure of A=3x and expenditure of B=2x

Therefore,

      4x-3x=1000...........Eq(1)

and 3x-2x=1000..........Eq(2)

subtracting Eq(1) and Eq(2), we get

4x-3y=1000\\-(3x-2y)=1000\\......................\\x-y=0

x=y.....Eq(3)

putting x=y in Eq(1), we get value of x as

4x-3x=1000

x=1000\\thus, y=1000 \\ because x and y are equal in Eq (3)

Now, Annual Income of A=4x=4*1000=4000

and Annual Income of B=3y=3*1000=3000

7 0
3 years ago
Sarah kicked a ball in the air. The function
Aleksandr-060686 [28]

Answer: The ball hits the ground at 5 s

Step-by-step explanation:

The question seems incomplete and there is not enough data. However, we can work with the following function to understand this problem:

f=30 t- 6t^{2} (1)

Where f models the height of the ball in meters and t the time.

Now, let's find the time t when the ball Sara kicked hits the ground (this is when f=0 m):

0=30 t- 6t^{2} (2)

Rearranging the equation:

6t^{2}-30 t=0 (3)

Dividing both sides of the equation by 6:

t^{2}-5 t=0 (4)

This quadratic equation can be written in the form at^{2}+bt+c=0, and can be solved with the following formula:  

t=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a} (5)  

Where:  

a=1  

b=-5  

c=0  

Substituting the known values:  

t=\frac{-(-5) \pm \sqrt{(-5)^{2}-4(1)(0)}}{2(1)} (6)  

Solving we have the following result:

t=5 s  This means the ball hit the ground 5 seconds after it was kicked by Sara.

6 0
3 years ago
What is the solution to –122 &lt; –3(–2 – 8x) – 8x?
Soloha48 [4]
<span>–122 < –3(–2 – 8x) – 8x
-122< 6 + 24x - 8x
-122 < 6 + 16x
-122 - 6 < 16x
-128<16x
-128/16<x
-8<x
x>-8
answer is </span>B. x > –8
6 0
3 years ago
Read 2 more answers
Please help me ASAP!
Slav-nsk [51]

Answer:

Exponential growth

Step-by-step explanation:

This is not a negative so it is growing.

Hope this helps!

3 0
4 years ago
Order the numbers below from smallest to largest. Write them in order.
Reptile [31]
2/3 3/4 5/8 7/24 is the answer
3 0
3 years ago
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