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Naddika [18.5K]
3 years ago
15

Can any body help with the word problems

Mathematics
1 answer:
Georgia [21]3 years ago
6 0

Answer:

1) 8x - 9

2) 5x - 2

Step-by-step explanation:

1) Given 8 times the difference between a number x and 9.

This means we should have: $ 8(x - 9) $

Now using the distributive property we distribute 8 to x and 9 like:

$ 8x - 72 $. Thus the answer.

For 2) All the expressions except 4 equals $ 5x - 10 $. The last option is $ 5x - 2 $. Thus the answer.

You might be interested in
Let f and g be the functions defined by f(x) = 10^ (x+2 / 3) and g(x) = log (x3 / 100) for all positive real numbers,
Vaselesa [24]

Answer:

F(x) and g(x) are not inverse functions.

Step-by-step explanation:

In order to calculate the inverse function of a function, we have to isolate X and after that, we change the variables.

As our function f(x) is a exponentian function, we can apply logarithm with base 10 (log) in both sides in order to isolate X. Remember that log10=1.

[tex]y=10^{(x+\frac{2}{3}) }\\\\log y=log 10^{(x+\frac{2}{3}) }\\log y = (x+\frac{2}{3}) . log10\\\frac{log Y}{log10} = (x+\frac{2}{3})\\\frac{log Y}{1} = (x+\frac{2}{3})\\log Y-\frac{2}{3}=x[/tex]

Now we change the variables.

F(x)=log x-\frac{2}{3}

F(x) and g(x) are not inverse functions.

4 0
3 years ago
Which is not a true proportion <br><br> 4/8 = 1/2<br> 7/21=1/3<br> 10/25=2/5<br> 12/14=4/7
valentinak56 [21]

Answer: D

Step-by-step explanation:

12 and 14 share the factor 2 so the furthest it can be simplified to is 6/7. this is not equal to 4/7

4 0
3 years ago
What is the product of 7/5 and 2/3
GrogVix [38]

Answer:

14/15 is the answer

Step-by-step explanation:

7/5x2/3

14/15

4 0
3 years ago
3 pound of pasta that serves 8 people. How many pounds I need to serve 64 people
Alexandra [31]

Answer:24 pounds

Step-by-step explanation:3x8 equals 24

8 0
3 years ago
Read 2 more answers
The family car runs out of gas. You have to push it up the driveway into a service station. The ramp is 4 meters long and rises
Sophie [7]

Answer:

Step-by-step explanation:

slope, m = 0.1m/4m = 0.025

Theoretical effort (ignoring friction) = 9000N * 0.025 = 225 N

actual effort = 300 N

efficiency

= potential energy out / actual energy in

= 225 N / 300 N = 0.75

7 0
3 years ago
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