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Yanka [14]
3 years ago
13

2 years ago my mother was 4 times my age then. In 18 years I will be half my mothers new age. How old am I now?

Mathematics
1 answer:
motikmotik3 years ago
8 0
2 years ago, you were 10 and your Mom was 40. 18 years from now, you will be 12+18 or 30 and your Mom will be 42+18 or 60, so you will be half her age which is 30 years old.
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A test has thirty questions worth 100 points. The test consists of True/False questions worth 3 points each and multiple choice
Vika [28.1K]
So let's break this question down.
You need a bit of both, right? Well we need to calculate how many multiple choices we can do whilst having true/false questions, and not going over or under on points.

So, let's pick a random number, 5. So let's do 8x5, that equals 40.
ohmygoditsrightiwasseriouslyjustguessing
Ok so now we have our number, 5 multiple choice questions. 
The true/false questions should be easy, just do 3x20 and you get 60.

ANSWER: 5 
5 0
4 years ago
Read 2 more answers
Help please soon !!!!!!
stepan [7]
75.25x + 3604 = 300.50x
300.50x - 75.25x = 3604
225.25x = 3604
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first answer 16 tons
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both companies charged the same are $4,808
second answer is $4,808
5 0
3 years ago
Solve using quadratic formula<br> 1. y=3x^2-x-6<br><br> 2. y=-5x+7x+3
nignag [31]
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5 0
3 years ago
) For which values of x is f '(x) zero? (Enter your answers as a comma-separated list.) x = (No Response) For which values of x
grigory [225]

Answer:

Check below, please

Step-by-step explanation:

Step-by-step explanation:

1.For which values of x is f '(x) zero? (Enter your answers as a comma-separated list.)

When the derivative of a function is equal to zero, then it occurs when we have either a local minimum or a local maximum point. So for our x-coordinates we can say

 f'(x)=0\: at \:x=2, and\: x=-2

2. For which values of x is f '(x) positive?

Whenever we have  

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then function is increasing. Since if we could start tracing tangent lines over that graph, those tangent lines would point up.

 f'(x)>0 \:at [-4,-2) \:and\:(2, \infty)

3. For which values of x is f '(x) negative?  

On the other hand, every time the function is decreasing its derivative would be negative. The opposite case of the previous explanation. So

 f'(x)

4.What do these values mean?

 f(x) \:is \:increasing\:when\:f'(x) >0\\\\f(x)\:is\:decreasing\:when f'(x)

5.(b) For which values of x is f ''(x) zero?

In its inflection points, i.e. when the concavity of the curve changes. Since the function was not provided. There's no way to be precise, but roughly

at x=-4 and x=4

6 0
3 years ago
What is the lowest common denominator of the following rational expressions?
Damm [24]

Answer:

I think its A

Step-by-step explanation:

3 0
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