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2 years ago

HELP ME PLEASE!!!

Mathematics

1 answer:

Kobotan [32]2 years ago

8 0

Answer:

$x=2 , y=1$

Step-by-step explanation:

Since the second equation is fully simplified and we know what x equals, we plug the entire equation of x in for x in the top equation:

$5(3y-1)+10y=20$

Now solve for y.

$y=1$

Now plug y back into the bottom equation and solve for x.

$x=3(1)-1$

$x=2$

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Find the value of a and of b for which<br>(a) the solution of x2 + ax < b is<br>-2<x < 4

KengaRu [80]

Answer: $a = -2$

$b = 8$

Step-by-step explanation:

Given :

$x^{2} +ax$

re - writing the equation , we have

$x^{2} +ax-b$

we need to find the value of a and b for which -2<x < 4 , this means that the roots of the quadratic equation are -2<x < 4.

The formula for finding the quadratic equation when the roots are known is :

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sum of roots = -2 + 4 = 2

product of roots = -2 x 4 = -8

substituting into the formula , we have:

$x^{2} -2x-8=0$ , which could be written in inequality form as

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comparing with $x^{2} +ax-b$ , it means that :

$a = -2$

$b = 8$

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Marina earns $15 for 1 hour of babysitting, $23 for 2 hours of babysitting, and $31 for 3 hours of babysitting. Write a function

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Read 2 more answers

HELP

vodka [1.7K]

So I = Prt

I for interest charge
P for principal ($4,840)
r for rate (6%)
t for time (2 yrs)

So you would then plug the information into the equation.....

I = 4,840*.06*2
I = 580.80

So the answer to your question is $580.80 which is option B

Hope this helps! :)

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