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2 years ago

Write an equation of a line in standard form with a x intercept of -5 and a y intercept of 15.

1 answer:

3 0

If this is a slope question then:

We know that the formula for slope is:

y = mx + b ( M being slope, X being the x- intercept and y being the y-intercept)

So if the question asks to write an equation of the line with a x-intercept of -5 and a y- intercept of 15.

So now you substitute -5 for the x-intercept, and 15 for the y-intercept:

So now it's

y = 15m + -5

The m stays since there's no value for m.

So the final answer is: y = 15m + -5

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I neeed help .......................................................

ycow [4]

Answer:

p = 5

Step-by-step explanation:

cross-multiply: 9 = p + 4

p = 5

5 0

2 years ago

Please help!!

fgiga [73]

The price of the small pots is $2.40 so you would have 2.4s ( multiply the number of small pots by the price)

She bought a total of 14 pots, so the number of large pots would be 14 - s ( subtract the number of small pots from the total )

Now you have:

L = 14-s

2.4s + 5.6(14-s) = 49.6

The answer is C.

7 0

2 years ago

1)4/9 ÷ 2/3

den301095 [7]

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4. 44.2. Multiply it as if there was no decimal. Then count the number of digits after the decimal in each factor. Then put the same number of digits behind the decimal in the product.
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6. 3.36. Multiply it as if there was no decimal. Then count the number of digits after the decimal in each factor. Then put the same number of digits behind the decimal in the product.
7. 2. Multiply the divisor by as many 10’s as necessary until you get a whole number. Remember to multiply the dividend by the same number of 10’s. Then divide it normally.
8. 10.93 (rounded). Multiply the divisor by as many 10’s as necessary until you get a whole number. Remember to multiply the dividend by the same number of 10’s. Then divide it normally. I rounded it to the hundredth.
Hope this helps!

3 0

2 years ago

Translate this phrase into an algebraic expression.

Andreas93 [3]

Answer:

4m-8

Step-by-step explanation:

5 0

2 years ago

Two poles are connected by a wire that is also connected to the ground. The first pole is 18 ft tall and the second pole is 24 f

9966 [12]

Answer:

72 feet from the shorter pole

Step-by-step explanation:

The anchor point that minimizes the total wire length is one that divides the distance between the poles in the same proportion as the pole heights. That is, the two created triangles will be similar.

The shorter pole height as a fraction of the total pole height is ...

18/(18+24) = 3/7

so the anchor distance from the shorter pole as a fraction of the total distance between poles will be the same:

d/168 = 3/7

d = 168·(3/7) = 72

The wire should be anchored 72 feet from the 18 ft pole.

_____

<em>Comment on the problem</em>

This is equivalent to asking, "where do I place a mirror on the ground so I can see the top of the other pole by looking in the mirror from the top of one pole?" Such a question is answered by reflecting one pole across the plane of the ground and drawing a straight line from its image location to the top of the other pole. Where the line intersects the plane of the ground is where the mirror (or anchor point) should be placed. The "similar triangle" description above is essentially the same approach.

Alternatively, you can write an equation for the length (L) of the wire as a function of the location of the anchor point:

L = √(18²+x²) + √(24² +(168-x)²)

and then differentiate with respect to x and find the value that makes the derivative zero. That seems much more complicated and error-prone, but it gives the same answer.

7 0

2 years ago