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3 years ago

What is the equation of the line that passes through the point (-1, -5) and has a slope of -2?

Mathematics

1 answer:

Kruka [31]3 years ago

8 0

Answer:

y = -2x -7

Step-by-step explanation:

y + 5 = -2 (x +1)

y + 5 = -2x -2 . move 5 to the other side by subtracting from both sides.

y = -2x -7

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It costs $2.57 to buy a box of crackers. Which of the following equation shows the amount of money needed, x, to buy m boxes of

liraira [26]

The answer will be B. X= 2.57m. Hope it help!

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2 years ago

Of the numbers 8, 9, 10, 11, and 12, which are solutions to the inequality 8p<84?

Allushta [10]

<span>8p<84
p<84/8
p<10.5

answer
</span><span>8, 9, 10 are solutions</span>

7 0

2 years ago

A triangular pyramid has a base shaped like an equilateral triangle. The legs of the equilateral triangle are all 20 inches long

Pie

Answer:

Surface area of pyramid with base equilateral triangle is $390+100\sqrt{3}$ square inches

Step-by-step explanation:

Recall the following result:

The total surface area(S) of a regular pyramid is given by,

$S = \frac{1}{2}pl+B$ ...... (1)

Here, p represents the perimeter of the base , $l$ the slant height and B the base area of the pyramid.

From the given information:

Side of equilateral triangle = 20 inches

Slant height of the pyramid( $l$ ) = 13 inches.

First find the perimeter and Area of the base pyramid.

Perimeter of equilateral triangle(p) = $3 \times (side)$

= $3 \times 20 = 60 inches$

Area of equilateral triangle(B) = $\frac{\sqrt{3} }{4} \times (side)^{2}$

= $\frac{\sqrt{3} }{4} \times (20)^2 = 100\sqrt{3}$ square inches.

Substitute the above values in equation (1) as shown below:

$S=\frac{1}{2} \times 60 \times 13+100\sqrt{3}$

$S= 390+100\sqrt{3}$ square inches

Hence, the surface area of pyramid with base equilateral triangle is $390+100\sqrt{3}$ square inches.

6 0

2 years ago

Suppose

Marrrta [24]

F(3) = t4(3) = 2

The value of the function at the point of expansion is the first (constant) term of the Taylor series.

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3 years ago

Write a system of equations that could be used to solve the situation described below.

attashe74 [19]

If there are 12 coins under the couch and every coin is either a nickel or a penny and together they are forming 32 cents then the equations which represent the problem will be x+y=12, 0.01x+0.05y=0.32. The correct option is B which is x+y=12, 0.01x+0.05y=0.32.

Given There are 12 coins and total money is 32 cents.

Let the number of pennies be x and the number of nickels be y.

According to question there are 12 coins so the first equation becomes:

x+y=12.

Then we have been told that together they amount to 32 cents.

We know that 1 penny is 1 cent coin and 1 nickel is 5 cent coin so the equation becomes :

1*x+5*x=32

x+5y=32

converting into dollar

0.01x+0.05y=0.32.

Hence the right equations showing the problem of nickel and pennies are x+y=12, 0.01x+0.05y=0.32.

Learn more about equations here brainly.com/question/2972832

#SPJ10

3 0

1 year ago