2 years ago

Write the slope of the line containing each pair of points.

Mathematics

1 answer:

navik [9.2K]2 years ago

7 0

Answer:

1) 1.5 2) 0.5

Step-by-step explanation:

To find slope using two points like (x1,y1) and (x2,y2), the slope is (y2-y1)/(x2-x1), so for first question (7-4)/(5-3) = 3/2 = 1.5, and same for the second question.

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The radius of a sphere is increasing at a rate of 3 mm/s. how fast is the volume increasing when the diameter is 100 mm?

Katena32 [7]

33 per seconds
1s/3mm x/100mm x=33.3 s

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3 years ago

Which expression represents the perimeter of the rectangle with a width of 4x+3 and legnth of 2x?

slavikrds [6]

P = 2L + 2W
P = 2(2x) + 2(4x + 3)
P = 4x + 8x + 6
P = 12x + 6

The correct response would be D. 12x + 6.

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3 years ago

Running consumes about 720 calories per hour about how many are used if you run for 40 minutes

Agata [3.3K]

Answer:

288

Step-by-step explanation:

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3 years ago

Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

barxatty [35]

Answer:

x=9,-1 and $x^2+(-8)x=9$

Explanation:

we have been given with the quadratic equation $x^2-8x-9$

we compare the given quadratic equation with general quadratic equation

general quadratic is $ax^2+bx+c=0$

from given quadratic equation a=1,b= -8,c= -9

substituting these values in the formula for discriminant $D=b^{2}-4ac$

$D=(-8)^2-4(1)(-9)=100$

Now, to find the value of x

Formula is $x=\frac{-b\pm\sqrt{D}}{2a}$

Now, substituting the values we will get

$x=\frac{-(-8)\pm\sqrt{100}} {2}= \frac{8\pm10}{2}=9,-1$

And rewritting the given equation by shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

$x^2+bx=c$

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3 years ago

Read 2 more answers

masons cell phone company charges $0.12 for every text message he sends plus $2.50 per month if mason sent 25 messages this mont

klemol [59]

Answer:

The answer would be $5.5

Step-by-step explanation:

First, multiply $0.12 by 25 to get $3. Add the $3 to $2.50 to get your answer of $5.5

3 0

3 years ago