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Taya2010 [7]
4 years ago
15

Question 9 of 10

Mathematics
1 answer:
Lubov Fominskaja [6]4 years ago
5 0

Answer:

  B. 12.4 years

Step-by-step explanation:

The rule of 72 says the doubling period multiplied by the interest rate in percent is equal to 72. Here, we're concerned with the doubling of the price index. That period will be ...

  72/5.8 ≈ 12.4 . . . years

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There are 3 students to 1 adult on a field trip. You need to find the number of adults needed for 24 students. What would the se
coldgirl [10]

Answer:

a = 24*1/3

a =8  

Step-by-step explanation:

We are using proportions to solve this problem by putting students over adults

students         3                   24

--------------- = ---------------  = -------------

adults                 1                   a

where a is the unknown number of adults

Using cross products

3a=24*1

Divide by 3

a = 24*1/3

a = 24/3

a = 8

5 0
3 years ago
Given the two expressions below: 1) 4x2 − 8x + 9 2) 3x2 + 2y + 6 Is the sum of the two expressions above a polynomial? Why or wh
Mkey [24]
Sum of polynomials are always polynomials.

Note that despite it's name, single constants, monomials, binomials, trinomials, and expressions with more than three terms are all polynomials.
For example,
0, π sqrt(2)x, 4x+2, x^2+3x+4, x^2-x^2, x^5+x/ π -1
are all polynomials.

What makes an expression NOT a polynomial?
Expressions that contain non-integer or negative powers of variables, rational functions, infinite series.
For example,
sqrt(x+1), 1/x+4, 1+x+ x^2/2!+x^3/3!+x^4/4!+...., (5x+3)/(6x+7)
are NOT polynomials.

8 0
3 years ago
Estimate 73% of 120 <br><br> Thanks if you help!
xxMikexx [17]

Answer:

73/100 (120)

answer:-87.6

3 0
3 years ago
Read 2 more answers
Why have I been blocked?
Ivanshal [37]
I’m not sure blocked from what
8 0
3 years ago
Express x in terms of a and b: b−7x=a−b
pav-90 [236]
B - 7x = a - b
Subtract b from both sides.

-7x = a - 2b
Divide both sides by -7.

x = \frac{-a + 2b}{7}
4 0
4 years ago
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