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gogolik [260]
4 years ago
11

Need help on this!!!!

Mathematics
1 answer:
Pavlova-9 [17]4 years ago
5 0

I am not good with that sorry

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The difference of two numbers.(a,b) is 21. The difference of 5 times a and 2 times b is 18. What are the values of a,b?
ziro4ka [17]
The equation is b-a= 21;
2b-5a = 18
a=8 and b= 29
therefore 29-8= 21
2 (29) -5 (8) = 18
58-40=18
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Step-by-step explanation:

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Samara deposited $5,000 into an account and didn't make any more deposits. The interest rate is 12%. How much did she earn in in
irinina [24]
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4 years ago
The original price of a computer was reduced by $250.
timama [110]

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3 years ago
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the water level in Noah's water tank is 72 inches high. Noah begins to drain a water tank by opening a valve. the water drains a
WARRIOR [948]

Answer:

An equation of slope:

y = -5x+72

Step-by-step explanation:

The equation of slope intercept is given by:

where m is the slope and c is the y-intercept or initial value.

Let x represents the time in minutes and y represents the height of the water level

As per the statement:

The water level in Noah's water tank is 72 inches high.

At x = 0

y= 72

It is also given that:

The water drains at a speed up 5 inches per minute.

Here, m represent the slope in inches per minute

(as the water drains)

Substitute in [1] we get;

y = -5x+c

Substitute x = 0 then;

72 = -5(0)+c

72 = c

⇒equation becomes: y = -5x+72

Therefore, an equation of slope is y = -5x+72

8 0
3 years ago
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