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4 years ago

14

5x+9y=-3 and 3x-7y=17

1 answer:

Nikolay [14]4 years ago

5 0

I don’t know what we have to do but from what I think it is.. to me the answer for the first one is 5(3)+9(-2)=-3. The way I figured this one out is I multiplied 5x3 which gave me 15 and then 9x-2 which gave me -18. Once you have that you should subtract 15 and -18 which will give you -3. I don’t know the second one... sorry

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Karon has 16 friends he invited to his party. If each friend brings him 1.5 pounds of candy as his treat, how many pounds of can

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He will receive 24 pounds of candy.

thats a lot o.O

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3 years ago

Arie makes 3 giant sandwiches to share equally with 8 friends. Each friend gets a fraction of a sandwich. Choose which two whole

hodyreva [135]

3 giant Sandwiches,

8 friends,

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4 years ago

Write a polynomial functionſ of least degree that has rational coefficients, a leading coefficient of 1, and the zeros 1,3, and

otez555 [7]

Answer:

f(x) = $x^{4} - 8x^{3} + 24x^{2} - 32x + 15$

Step-by-step explanation:

First of all, if 2 - i is a zero, then so is 2 + i

All you need to do now is multiply (x - 1)(x - 3)(x - 2 + i)(x - 2 - i)

I will do part of that multiplication

(x - 2 + i)(x - 2 - i) = $x^{2}$ - 2x - xi - 2x + 4 + 2i + xi - 2i - $i^{2}$

= $x^{2}$ - 4x + 5

So, now (x - 1)(x - 3)( $x^{2}$ - 4x + 5) = $x^{4} - 8x^{3} + 24x^{2} - 32x + 15$

I will let you finish that multiplication. I did some and you can do some. OK?

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3 years ago

Can a right triangle ever have an obtuse angle?

SCORPION-xisa [38]

No because a right triangle always has a right angle

5 0

3 years ago

Read 2 more answers

6. A cookie jar contains 315 M&M's. There are only brown and

Romashka [77]

The system of equations representing the problem is

$b+g=315\\8b-g=0$

and we have $35$ brown M&M's and $280$ green M&M's in the cookie jar.

<h3>Formulating the equations</h3>

If we let $b$ represent the number of brown M&M's and $g$ the number of green M&M's, then, from the sentence

"...<em>A cookie jar contains 315 M&M's. There are only brown and green M&M's in the jar</em>..."

we can construct the algebraic equation

$b+g=315$

Also, from the sentence

"...<em>The number of green M&M's is 8 times that of the brown M&M's</em>..."

we can construct the algebraic equation

$g=8b\implies 8b-g=0$

overall, we have the system of equations with unknowns $b$ and $g$

$b+g=315\\8b-g=0$

<h3>Solving the system of equations</h3>

Adding the two equations, we get

$(b + 8b) +(g + (-g))=315+0\\9b=315\\\\\dfrac{9b}{9}=\dfrac{315}{9}\\\\b=35$

Substituting this value for $b$ into the relationship $g=8b$

$g=8b\\g=8(35)=280$

Therefore, we have $35$ brown M&M's and $280$ green M&M's

Learn more about word problems and systems of equations here brainly.com/question/14111058

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3 years ago

Read 2 more answers