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Svetlanka [38]
3 years ago
7

Simplify: 2/5y−4+7−9/10y

Mathematics
2 answers:
algol133 years ago
7 0
It’s a nightmare question
Lostsunrise [7]3 years ago
5 0

Answer:

-1/2y + 3

Step-by-step explanation:

2/5y - 4 + 7 - 9/10y

= (2/5y - 9/10y) + (-4 + 7)

= (2/5 - 9/10) y + 3

= (4/10 - 9/10) y + 3

= -5/10y + 3

= -1/2y + 3

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The first answer is factual, but please help.
DIA [1.3K]

Answer:

B) 2

C) y = 2x

Step-by-step explanation:

Part B

Constant is 2 because in order to get x to the value of y, you must multiply by 2.

Part C

y = 2x

3 0
2 years ago
What is the simplified form of x+6 over x+4 + x-3 over 3
Zigmanuir [339]
1 Cancel <span>33</span>
<span>x+\frac{6}{x}+4+x-1<span>x+<span><span>​x</span>​<span>​6</span><span>​​</span></span>+4+x−1</span></span>
2 Collect like terms
<span>(x+x)+\frac{6}{x}+(4-1)<span>(x+x)+<span><span>​x</span>​<span>​6</span><span>​​</span></span>+(4−1)</span></span>
3 Simplify
<span><span>2x+\frac{6}{x}+3<span>2x+<span><span>​x</span>​<span>​6</span><span>​​</span></span>+3</span></span><span>
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7 0
3 years ago
The profit that a vendor makes per day by selling x elephant ears is given by the function P(x)= -0.004x^2+3.2x-200. Find the nu
dezoksy [38]

Answer:

The number of elephant ears that must be sold to maximize profit is 400.

Step-by-step explanation:

Given that,

The profit that a vendor makes per day is given by

P(x)= - 0.004x² +3.2 x -200

where x is number of elephant ears.

P(x)= - 0.004x² +3.2 x -200

Differentiating with respect to x

P'(x)= - 0.008x+3.2

Again differentiating with respect to x

P''(x) = -0.008

For maximum or minimum P'(x)=0

- 0.008x+3.2=0

⇒0.008x=3.2

\Rightarrow x=\frac{3.2}{0.008}

⇒ x = 400

P''(x)|_{x=400} = -0.008

Since at x=400, P''(x)<0, the profit is maximize.

P(400) = -0.004×400²+3.2×400-200

          =440

The number of elephant ears that must be sold to maximize profit is 400.

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2 years ago
Solve for x number 11
Julli [10]

Answer:b

Step-by-step explanation:

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3 years ago
Factor the expression on the left. *<br> x2 - 100 = 0
hichkok12 [17]

Answer:

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Step-by-step explanation:

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3 years ago
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