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3 years ago

What does it mean to isolate the variable?

Mathematics

2 answers:

UNO [17]3 years ago

7 0

Answer:

It means you get the varible on one side of the equation all by itself (basically with no other numbers.)

emmainna [20.7K]3 years ago

3 0

To isolate the variable means to get it by itself.

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Which expression can be substituted for y in the top equation of the

maria [59]

Answer:

Y=7+3x, x=-3, y=-2

Step-by-step explanation:

3x-5y=1. Equation 1

3x-y=-7. Equation 2

-y=-7-3x isolate for y in equation 2

y=7+3x multiplied by -1 to get positive y

3x-5(7+3x)=1 substitute y value of equation 2 (7+3x) into equation 1

3x-35-15x=1

-12x=36

x=-3

solve for y.

3x-5y=1

3(-3)-5y=1

-9-5y=1

-5y=10

y=-2

6 0

2 years ago

A base of ten raised to a negative exponent corresponds to a number that is-

Masteriza [31]

Answer:

A base of ten raised to a negative exponent corresponds to a number that is between 0 and 1.

Step-by-step explanation:

A base of ten raised to a negative exponent, say - 1 will correspond to the number, $10^{- 1} = \frac{1}{10^{1}} = \frac{1}{10}$ .

Again, a base of ten raised to a negative exponent, say - 2 will correspond to the number, $10^{- 2} = \frac{1}{10^{2}} = \frac{1}{100}$ .

{Since we know the property of exponents as $x^{- a} = \frac{1}{x^{a}}$ }

Therefore, all those numbers are between 0 and 1.

Hence, a base of ten raised to a negative exponent corresponds to a number that is between 0 and 1. (Answer)

3 0

3 years ago

Find the difference of the following polynomials:<br> (-2r4 + 3r3 - 10) and (4r4 - p3 + 2r2 + 7).

Vilka [71]

$-6 r^{4}+4 r^{3}-2 r^{2}-17$ is the difference between $-2 r^{4}+3 r^{3}-20 \text { and } 4 r^{4}-p^{3}+2 r^{2}+7$

Step-by-step explanation:

Given equations,

$-2 r^{4}+3 r^{3}-20 \text { and } 4 r^{4}-p^{3}+2 r^{2}+7$

Difference of the polynomial is written as

$=-2 r^{4}+3 r^{3}-20-\left(4 r^{4}-p^{3}+2 r^{2}+7\right)$

Open the brackets and multiply with -1 the whole expression $\left(4 r^{4}-p^{3}+2 r^{2}+7\right)$ becomes

$=-2 r^{4}+3 r^{3}-20-4 r^{4}+p^{3}-2 r^{2}-7$

$=-6 r^{4}+4 r^{3}-2 r^{2}-17$

This is the difference of given two polynomials is $-6 r^{4}+4 r^{3}-2 r^{2}-17$ .

4 0

2 years ago

Chantal had pound of ham and pound of turkey to make sandwiches. She said she had pound of sandwich meat altogether. Is Chantel'

Burka [1]

B. Should be it good luck

4 0

3 years ago

Read 2 more answers

Find the missing side. round to the nearest tenth

barxatty [35]

So you would use the law of sines so set up the equation sin18/16 = sin72/x (sin 72 being the top angle) and then you cross multiply and solve from there:)
Hope this helps!

3 0

2 years ago

Read 2 more answers