3 years ago

When using the substitution method for solving a system of linear equations in two variables, what should be the first step?

1 answer:

8 0

The first step would be to isolate a variable (solve for a variable)....so u will have something to sub into the other equation

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A house and a lot cost more than $89,000. The house cost $1000 more than seven times the cost of the lot. How much does the lot

tatyana61 [14]

7x+1000+x=89000

7x+x+1000-1000=89000-1000
8x=88000

8x/8=88000/8
x=$11000

4 0

3 years ago

Meghan uses of pedometer two find how many steps she takes each school day. she took 32,410 steps over the course of five days.

LUCKY_DIMON [66]

Rounded, the answer would be 2.86.

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3 years ago

What is the point slope form of a line with slope 2 that contains the point (1, -1)

mezya [45]

Point slope form is y - y1 = m(x-x1)

So,

y - (-1) = 2(x - 1)
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Hope this helps :)

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2 years ago

Calculate the perimeter of the following shape. 6cm y= 10 cm 12 cm 5 cm

Phantasy [73]

Answer:

The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides.

10 cm + 12 cm + 5 cm + 6 cm

= 33 cm

3 0

3 years ago

The probability, P, that a person responds to an advertisement can be modeled by the exponential function P = 1 – e^-0.047t. In

MA_775_DIABLO [31]

To solve this equation, start by noticing that you want to find t when P is 75%, or 0.75. Plug in 0.75 for P. Please see the attached screenshot for a step-by-step. The correct answer is 29.496 days.

EDIT 2: I actually was correct! You check the answer by substituting 29.496 for t in the original equation set equal to 0.75. It is 0.75. I had forgotten the negative sign when I checked.

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3 years ago