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3 years ago

What is the first step you would take if you were using the algebraic method of substitution to solve?

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

7 0

Answer:

substitute the 'x' with any number

Step-by-step explanation:

an example of this could be, if you need to find

y=2x+6

you would need to find what y is

in order to do that, subsitute x for any number, example, 2, and work out the equation. 2x means 2 times 2 (x is substituted by 2). that is 4 and +6 is 10. this means y would be 10. this is how substitution happens:)

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A sphere and a cylinder have the same radius and height. The volume of the cylinder is 50 ft.<br> Tv

alexgriva [62]

Answer:

What is the height?

You need the height and radius to calculate radius

Step-by-step explanation:

3 0

3 years ago

Simplify: −2s − 9 + 7 − 5r use s = 3 and r =

egoroff_w [7]

Answer:

-2s - 9 + 7 - 5r

Step-by-step explanation:

Add -9 and -7.

-2s - 2 - 5r

Move -2.

-2s - 5r - 2

Reorder -2s and -5r.

-5r - 2s - 2

I hope this helps.

if you could, feel free to mark me Brainliest it would be much appreciated :D

8 0

3 years ago

Write the equation of the line that passes through (1, 3) and has a slope of 2 in point-slope form

raketka [301]

Answer:

y-3= 2(x-1)

Step-by-step explanation:

1. The equation of a line in point slope form is y-y1= m(x-x1)

2. m=slope and (x1,y1) is the point the line passes through

3. The point the line passes through is (1,3)

4, The slope is 2

5. Therefore the answer is y-3=2(x-1)

3 0

3 years ago

Read 2 more answers

Is 4/7 an irrational number

ivann1987 [24]

Answer:

All rational numbers are whole numbers so yes, 4/7 is an irrational number

6 0

3 years ago

The function y=−16x2+36 represents the height y (in feet) of an apple x seconds after falling from a tree. Find and interpret th

Lapatulllka [165]

Answer:

A. x-intercept=x=1.5 , y-intercept=y=36

B.the apple will hit the ground after x=1.5 seconds.

Step-by-step explanation:

A. X-intercept and Y-intercept:

X-intercept:

the point where the line passes through X-axis i.e. point where y=0

Y-intercept:

the point where the line passes through Y-axis i.e. point where x=0

Given Equation:

$y=-16x^2+36$

Finding X-intercept:

to find x-intercept, put y=0 in the given equation as

$0=-16x^2+36\\$

adding $-16x^2$ to both sides of the equation, we get

$16x^2=36$

dividing both sides by 16, we get

$x^2=\frac{36}{16}\\x^2=2.25$

taking√ on both sides of the equation, we get

$x=\sqrt{2.25}\\ x=1.5$

Finding Y-intercept:

to find y-intercept, put x=0 in the given equation

$y=-16(0)^2+36\\y=36$

thus x-intercept $=x=1.5$

and y-intercept $=y=36$

B.when will the apple hit the ground after x seconds?

In the given equation if x represent the time in seconds then y represents the height of the tree from which the apple is fallen down

so if the apple hits the ground, at this stage the height is zero so y=0, thus we get x as

$0=-16x^2+36\\$

dividing both sides by 16, we get

$x^2=\frac{36}{16}\\x^2=2.25$

taking√ on both sides of the equation, we get

$x=\sqrt{2.25}\\ x=1.5$

the apple will hit the ground after x=1.5 seconds.

8 0

3 years ago