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polet [3.4K]
3 years ago
5

If you put 200 into a CD that pays 9 percent interest compounded quarterly how long will it take for this money to compound acco

rding to the rule of 72
Mathematics
1 answer:
Kobotan [32]3 years ago
7 0
Well the rule is divide 72 into the interest that is 9 in this case so  your answer shall be 8.
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)Which statement best describes the area of the triangle shown below?
nasty-shy [4]

9514 1404 393

Answer:

  (b)  It is one-half the area of a square of side length 4 units.

Step-by-step explanation:

The triangle described can be formed by drawing the diagonal through a square 4 units on a side. Such a diagonal cuts the square cleanly in half, so the area of the triangle is half the area of the square.

3 0
3 years ago
X^2-3x-28=0 what are the roots
Oksi-84 [34.3K]

Answer:

\large\boxed{x=-4\ \vee\ x=7}

Step-by-step explanation:

x^2-3x-28=0\\\\x^2+4x-7x-28=0\\\\x(x+4)-7(x+4)=0\\\\(x+4)(x-7)=0\iff x+4=0\ \vee\ x-7=0\\\\x+4=0\qquad\text{subtract 4 from both sides}\\x=-4\\\\x-7=0\qquad\text{add 7 to both sides}\\x=7

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3 years ago
Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they
madam [21]

Answer: The mechanic who worked 5 hours charged $45 per hour while the mechanic who worked for 15 hours charged $105 per hour.

Step-by-step explanation:

Let x be the rate of mechanic who worked 5 hours

And y, the rate of mechanic who worked 15 hours

Represent the question in an equation

x + y = 150.............. equation 1

5x + 15y = 1800........equation 2

x + y = 150, x = 150 -y

Substitute the value of x into equation 2 to get y

= 5 (150 -y) + 15y = 1800

Then open the bracket

750 - 5y + 15y = 1800

750 + 10y = 1800

10y = 1800 - 750

10y= 1050 (divide both sides by 10)

y = 1050/10

y = 105

Substitute the value of y into equation 1 to get the value of x

x + 105 = 150

x = 150 - 105

x = 45

Therefore, the mechanic who worked 5 hours charged $45 per hour while the mechanic who worked for 15 hours charged $105 per hour.

I hope this is clear, mark as brainliest please

3 0
3 years ago
14b=-56 don't understand
Zigmanuir [339]
I hope this helps you

7 0
3 years ago
Which statement best describes Marcos equation
AnnZ [28]
Its the second one if I'm not mistaken if not I'm sorry

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3 years ago
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