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Ray Of Light [21]
3 years ago
15

170%of 40 is what number

Mathematics
1 answer:
Allisa [31]3 years ago
3 0
170÷100=1.7
1.7×40=68
Answer: 68
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5x^2-2x=2<br>help plsmmm​
Yuki888 [10]

Answer:

Presumably you're solving for x here?  Without further information we'll assume that.

With that in mind, x is approximately equal to 0.86 and -0.46

Step-by-step explanation:

Let's start by putting it in the usual ax² + bx + c format.

5x^2- 2x = 2\\5x^2 - 2x - 2 = 0\\

let's solve it.  First we'll multiply both sides by five, making the first term a perfect square:

25x^2 - 10x - 10 = 0\\

Now we'll add 11 to both sides:

25x^2 - 10x + 1 = 11\\

Which makes the left side a perfect square:

(5x - 1)^2 = 11

And now we can solve for x:

(5x - 1)^2 = 11\\\\5x - 1 =  \sqrt{11} \\\\5x = 1 + \sqrt{11}\\\\x = \frac{1 + \sqrt{11}}{5}

Note that there's no apparent way of drawing the ± symbol when editing equations, so take that + sign as actually being ±.

That gives us two answers:

x = \frac{1 + \sqrt{11}}{5}\\\\x \approx \frac{1 + 3.32}5\\\\x \approx \frac{4.32}5\\\\x \approx 0.86             x = \frac{1 - \sqrt{11}}{5}\\\\x \approx \frac{1 - 3.32}5\\\\x \approx \frac{-2.32}5\\\\x \approx -0.46

7 0
2 years ago
What is happening at this step in the equation solving process for 3x+7=5x <br> 7=2x
Leya [2.2K]
Your subtracting 3x from 5x: 5x-3x
This is so you only have a variable on one side
3 0
2 years ago
Read 2 more answers
I only need help on the one that are mark blue
Oxana [17]
1. (54/9)6 equation
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4 0
3 years ago
Explain why statement 3^(-2)=-6 is false
malfutka [58]

Answer: -9

Step-by-step explanation: You are not doing 3(-2) to get -6. That's incorrect. What you are supposed to do is multiply the base which is 3 and then multiply it with -2 so that would 3(3) twice and don't forget the negative in front of the two so that would be -9 as the correct answer. :)

6 0
2 years ago
Find the slope of a line given two or more points (2,4)(5,3)
masha68 [24]

Answer:

-1/3 (can u plz give me the brainliest answer???)

Step-by-step explanation:

change in y over the change in x. (or rise over run).

-1/3

Have a nice day!!!!!!!!!!!

<u>KA</u>

7 0
3 years ago
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