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Sati [7]
3 years ago
9

(06.01) Solve x + 3y = 9 3x − 3y = −13

Mathematics
1 answer:
Irina-Kira [14]3 years ago
4 0

Answer:

Slove For X

x= -1

Solve for Y

Y= 10/3

Step-by-step explanation:

SO I did Elimination method

To isolate X and to solve for it

x+3y=9

3x−3y=−13

Add these equations to eliminate y:

4x=−4

Solve for X

x=-1

Now plug x back in to solve for y

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Rick wants to buy a tool set with original price $115. Next week the tool set will be on sale for 40% off. Find the sale price.
inessss [21]

Answer:

$69

Step-by-step explanation:

$115 x 0.4 = $46 discount

$115 - 46 = $69

4 0
3 years ago
Read 2 more answers
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
Vlad [161]
The simultaneous equations are
2x - 7y = 4         (1)
3x + y = -17       (2)

Write (2) as
y = - 3x - 17       (3)

Substitute (3) into (1).
2x - 7(-3x - 17) = 4
2x + 21x + 119 = 4
23x = -115
x = -5
This is the equation obtained after substituting y from the second equation into the first equation.
The solution for y is
y = -3(-5) - 17 = -2

Answer: x = -5

Note: The solution is x = -5,  y = -2.
4 0
3 years ago
I need help fastt plss
valina [46]

Answer:

102? hopefully this helps

7 0
3 years ago
YOU WILL GET 20 POINTSSS ANSWER FAST Find the surface area of the square pyramid.
Whitepunk [10]

Answer:

105IN^2

Step-by-step explanation:

surface area of a square pyramid formula: 2bs+b^2

where s=slant height

and

b=base

so

2(5)(8)+5^2=

80+25=106

105in^2

Hope this helps!

7 0
3 years ago
What is the completely factored form of x4y – 4x2y – 5y? y(x2 – 5)(x2 1) y(x2 5)(x2 – 1) (x2y – 5)(x2 1) (x2y 5)(x2 – 1)
Gala2k [10]

Answer:

y (x² + 1) (x² - 5)

Step-by-step explanation:

<h3>Factorization:</h3>

   Take 'y' from each term.

x⁴y - 4x²y - 5y = y[x⁴ - 4x² - 5]

Now factorize x⁴ - 4x² - 5.

            Sum = -4

        Product = -5

        Factors =  -5 , 1  

When we add (-5) + 1, it gives (-4) and when we multiply (-5)*1, gives (-5).

x⁴ - 4x² - 5 = x⁴ + x² - 5x² - 5

                 = x²(x² + 1)  -5(x² + 1)

                 = (x²+ 1) (x² - 5)

x⁴y - 4x²y - 5y = y (x² + 1) (x² - 5)

7 0
2 years ago
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