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Irina-Kira [14]
2 years ago
10

Combine like terms. What is a simpler form of the expression? -3(-4y + 3) + 7y

Mathematics
2 answers:
VikaD [51]2 years ago
6 0
A simpler form of this expression would be 19y-9
puteri [66]2 years ago
5 0
The answer would be 19y - 9, here is the work :)

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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
One end of a ramp is raised to the back of a truck 5 feet above the ground. 1 point
sveta [45]

Answer:

38.7°

Step-by-step explanation:

You are basically looking at a triangle with a 90° angle (check picture).

Since we are looking for the ramp's angle and are given the length of the opposite and the hypothenuse, we have to solve the following equation:

sin (\alpha) = opposite / hypothenuse= 5 ft/8ft

which is equivalent to

\alpha = sin^{-1}(5/8)\approx 38.7\deg

6 0
2 years ago
Snow is falling steadily in Syracuse, New York. After 2 hours, 4 inches of snow has fallen.
tiny-mole [99]

Answer:

48 inches but turn that into feet

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What would the measure of angle “b” be?
mr Goodwill [35]

Answer:

do you have a picture or something?

6 0
3 years ago
Miss Jones gets 4 membership points for every £25 she spends in a shop.
Kamila [148]

Answer:

28 membership points

Step-by-step explanation:

175÷25=7

7x4=28

Hope this helps! Thanks.

7 0
2 years ago
Read 2 more answers
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