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3 years ago

Bill gates makes approximately $12 billion a year. On average, how much does he make per minute

Mathematics

1 answer:

Nataly_w [17]3 years ago

4 0

Find out how many min are in a year and divided by that and you get your 22831.0502283

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How to substitute 3x+3y=-3 and y=5x-1?

schepotkina [342]

Since y = 5x-1, we can fill it into 3x + 3y = -3. First, let's look at relating to a simpler equation. Let's say that x + y = 9 and y = 3 + 5. Now, we can fill it in to get that x + (3 + 5) = 9. Now, we know that 3+5 is 8, so x + 8 = 9. Now, x = 1. Likewise, we can do the same. For 3x + 3y = -3, all we need to do is to switch the y in 3x + 3y = -3 with 5x - 1. So it would become 3x + 3(5x - 1) = -3. Now we distribute to get 3x + 15x - 3 = -3. Now add three to both sides to get 3x + 15x = 0. Now simplify to get 18x = 0. Now we know that x = 0. Now fill x into y = 5x - 1. So y = 5(0) - 1. Now we know that y = -1.

To check fill in the answer to 3x + 3y = -3.
3(0) + 3(-1) = -3
0 + (-3) = -3
0 - 3 = -3
-3 = -3
Now that our check is completed we now know that x is 0 and y is -1.

7 0

4 years ago

Treys test score average decreased by 14 points this semester. Write a signed number to represent this change in average.

larisa [96]

Answer:

$-14$

Step-by-step explanation:

Given: Trey's test score average decreased by 14 points this semester.

To find: a signed number to represent this change in average.

Solution:

The decrease can be denoted by minus $(-)$ sign and increase can be denoted by plus $(+)$ sign.

So, a signed number to represent the change in test score average is $-14$

5 0

3 years ago

My teacher said it was rise over run but I don't understand.

Komok [63]

Here u go fren this is what rise over run means

6 0

4 years ago

Read 2 more answers

Dan drives 140 miles on Monday and 125 km on Tuesday. How many km did he drive in total?

pogonyaev

Answer:

365.308 km

Explanation:

If you convert 140 miles into kilometers you get 225.308 km. Then you just have to add 140 and 225.308 together to get your answer. Hope this helped.

6 0

3 years ago

A balloon is hovering 800 ft above a lake. The balloon is observed by the crew of a boat as they look upwards at an angle of 20

stich3 [128]

Answer:

Step-by-step explanation:

given that a balloon is hovering 800 ft above a lake. The balloon is observed by the crew of a boat as they look upwards at an angle of 20 degrees. Twenty-five seconds later, the crew has to look at an angle of 65 degrees to see the balloon

The distance of the boat from the balloon measured horizontally in the I position = 800 tan 20

After 25 seconds distance of the boat from the balloon measured horizontally in the II position

= 800 tan 65

Distance moved by the boat in 25 seconds

= $800(tan 65-tan 20)\\= 1342.56$

Speed of the boat per second = $\frac{1342.56}{25} \\=53.702$

53.702 feet per second is the speed of boat

5 0

3 years ago