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Alenkasestr [34]
3 years ago
7

Subsitutey=4x-1 y=-3x-8

Mathematics
1 answer:
Usimov [2.4K]3 years ago
6 0

Answer:

x = -1

y = -5

Step-by-step explanation:

Because we have an equation for the value of y, we can do this:

4x - 1 = -3x - 8

Then we can solve for x.

4x = -3x - 7 --- add 1 to both sides

7x = -7 --- add 3x to both sides

x = -1 --- divide both sides by 7.

Now that we know the value of x, we can solve for y.

y = 4(-1) - 1 --- plug in x

y = -4 - 1 --- simplify

y = -5 --- simplify

Now we know x and y.

x = -1

y = -5

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Choose the fraction that has not been reduced to simplest form 19/3810/1921/3415/18
lozanna [386]

19/38 and 15/18

Explanation:

19/38 can be reduced as there is a factor other than 1 that can divide without a remainder. Factor is 19

It can still be reduced because 19*2 = 38

19/38 = 1/2

10/19 cannot be reduced as there is no factor other than one to divide without a remainder

21/34 cannot be reduced as there is no factor other than one to divide without a remainder

15/18 can be reduced as there is a factor other than 1 that can divide without a remainder.

The factor is 3

15/18 = 5/6

Fraction that has not been reduced to simplest form are 19/38 and 15/18

5 0
1 year ago
If a polynomial function f(x) has roots 3 and StartRoot 7 EndRoot, what must also be a root of f(x)?
Ivenika [448]

Answer:

–√(7) must also be a root of f(x)

Step-by-step explanation:

Given that the roots of an equation is 3 and √(7). This means that x = 3 or √(7). Therefore, the function is definitely going to be:

f(x) = (x – 3)(x² – 7)

This is because we are dealing with √(7) and what brought about √(7) was x² = 7.

If this is the case, we know that x² = 7 will give

x = ±√(7)

Hence, our roots are x = 3 or √(7) or –√(7). Therefore, –√(7) must also be a root of f(x).

4 0
3 years ago
Read 2 more answers
What value for x will make the equation true?
Rama09 [41]

Answer:

C . 4

Step-by-step explanation:

step 1 : -3 multiply with inside of the ( 7x-5 )

= -21x + 15

step 2 : then it will be 21x + 15 = 87 + 3x

step 3 : switch between the odds into like this

21x - 3x = 87 - 15

step 4 : subtract it all

18x = 72

step 5 : bring 18 to the other side

x = 72/18

step 6 : to find the ans of x is just calculate them

x = 72 ÷ 18

= 4

Or you can do like these ⬇️

-3 ( 7x - 15 ) = 87 + 3x

21x + 15 = 87 + 3x

21x - 3x = 87 - 15

18x = 72

x = 72/18 or 72÷18

x = 4

4 0
3 years ago
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anastassius [24]

Answer:

the answer is c

Step-by-step explanation:

you find what percent 56 is of 350

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3 years ago
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#banLoveYourselfFirst2020onbrainly
andriy [413]

Answer:

Awww love you man!

(And me lol)

Step-by-step explanation:

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3 years ago
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