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3 years ago

Please help asap 20 pts

Mathematics

2 answers:

lyudmila [28]3 years ago

6 0

Answer:

D or y = 1/2x - 4

Step-by-step explanation:

The slope-intercept form of a line is y = mx + b where m is the slope and b is the y-intercept. In this case, the line is clearly increasing in value, so it has a positive slope or m. This rules out B and C as options. The y-intercept, or where the line intersects with the y-axis is at -4 for this. So, b = -4. If we want to write it out as an equation : y = mx - 4 where m has to be positive. The only option is D which is our answer. Hope I could help! :)

77julia77 [94]3 years ago

5 0

It would be choice D. Since it starts at -4, this would be the b part of the slope-intercept equation. You can then see that it goes up 1, over 2 continuously. This would be the m part of the slope-intercept equation. Finally, it would be a positive 1/2 since it it going to the right.

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Expand & simplify 5 ( p + 5 ) + 6 ( p + 6 )

Aloiza [94]

5(p+5) + 6(p+6)

First step: Distribute (PEMDAS --> Parenthesis)

5p + 25 + 6p + 36 Now, combine like terms

11p + 61

Thus, the answer is 11p + 61

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2 years ago

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7. Simplify this what’s the answer?

trasher [3.6K]

first the square root of 4 is 2 so we can sub that in.

now we have 2(2*2)^-2.

2 * 2 of course is 4

with 2(4)^-2, keep in mind that negative exponents just mean to "flip" the number and turn the exponents positive.

so 4^-2 is the same as 1/4^2 or 1/16.

finally 1/16 * 2 = 2/16. 2/16 simplified is 1/8.

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3 years ago

Lucy makes green paint by mixing yellow and blue paint in the ratio 5:2. Blue paint costs

ahrayia [7]

Answer:

No, she won’t make a profit

Step-by-step explanation:

Here, we are interested in determining if Lucy made a profit or a loss.

The cost of blue paint is 30 pounds for 5 liters. This means that a liter of blue paint is 30/5 = 6 pounds per liter

The cost of yellow paint is 28 pounds per 7 liters, the cost per liter is 28/7 = 4 pounds per liter

Now, in her mixing, she mixes 5 parts of yellow paint and 2 parts of blue paint.

This means that she mixed them the ratio as follows per liter;

For yellow, we have; 5/(5+2) = 5/7

For blue we have 2/(5+2) = 2/7

Now since a liter of yellow paint cost 4 pounds

5/7 of a liter will cost 5/7 * 4 = 20/7 pounds

For the blue paint, a liter cost 6 pounds, 2/7 of a liter will cost 2/7 * 6 = 12/7

The total cost in pounds in this;

20/7 + 12/7 = 32/7 = £4.57 pounds to 2 decimal place

Now she sells her green paint product at £4.5 per liter. Since this is less than the cost price of production which is £4.57, she is running at a loss

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3 years ago

A=1/2h(B+b);A=81,B=8,b=1 what is h

Semenov [28]

Answer:

81=1/2h×9,

81=1/18h

1458h=1

h=1/1458

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2 years ago

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Which of the following graphs could be the graph of the function f(x)=-0.08x(x^2-11x+18)?

MariettaO [177]

Answer:

option C

Step-by-step explanation:

f(x)=-0.08x(x^2-11x+18)

Factor the parenthesis and find out the x intercepts

(x^2-11x+18)

We find out two factors whose product is 18 and sum is -11

-9 and -2 gives us product 18

-9 -2 gives us sum -11

(x^2-11x+18) =(x-9)(x-2)

f(x)=-0.08x(x^2-11x+18)

f(x)= -0.08x(x-9)(x-2)

set f(x) =0 and solve for x

-0.08x(x-9)(x-2) =0

-0.08x =0, so x=0

x-9 = 0 , so x=9

x-2 =0 , so x=2

x intercepts are (0,0) (2,0) and (9,0)

x intercepts are not repeating

so the graph crosses x -axis at x=0, 2,9

option C is correct

The graph is attached below4

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3 years ago

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