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3 years ago

I need this quick. Solve -40x+68= -2 and .65x + 23= -1 using Elimination method

Mathematics

1 answer:

Paul [167]3 years ago

4 0

Step-by-step explanation:

hope it is helpful to you

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The question is in the picture. will give brainilist.

Nuetrik [128]

Answer:

y=2/5x-15

Step-by-step explanation:

y-y=m(x-x¹)

y-(-11)=2/5(x-10)

y+11=2/5x-4

-11 -11

y=2/5x-15

3 0

3 years ago

shirts are 25% off. the original price of one shirt is $12. what is the total cost, in dollars of a shirt at the sale price, inc

Natalka [10]

Answer:

$9.45

Step-by-step explanation:

1 - 0.12 = 0.88

12.60 * 0.88 = 9.45

You save $3.15

8 0

3 years ago

Find the dimensions of a rectangle whose perimeter is 42 m and whose area is 104 m squared

julia-pushkina [17]

P=42 m
1/2 of P=21
1/2 of P= l+w
21=13+8
A=13×8
A=104 m^2. As a result, the length is 13 m, and the width is 8 m. Hope it help!

6 0

3 years ago

Need help with this math question

anastassius [24]

Answer:

The vertex is: $(6, 8)$

Step-by-step explanation:

First solve the equation for the variable y

$x^2-4y-12x+68=0$

Add 4y on both sides of the equation

$4y=x^2-4y+4y-12x+68$

$4y=x^2-12x+68$

Notice that now the equation has the general form of a parabola

$ax^2 +bx +c$

In this case

$a=1\\b=-12\\c=68$

Add $(\frac{b}{2}) ^ 2$ and subtract $(\frac{b}{2}) ^ 2$ on the right side of the equation

$(\frac{b}{2}) ^ 2=(\frac{-12}{2}) ^ 2\\\\(\frac{b}{2}) ^ 2=(-6) ^ 2\\\\(\frac{b}{2}) ^ 2=36$

$4y=(x^2-12x+36)-36+68$

Factor the expression that is inside the parentheses

$4y=(x-6)^2+32$

Divide both sides of the equality between 4

$\frac{4}{4}y=\frac{1}{4}(x-6)^2+\frac{32}{4}$

$y=\frac{1}{4}(x-6)^2+8$

For an equation of the form

$y=a(x-h)^2 +k$

the vertex is: (h, k)

In this case

$h=6\\k =8$

the vertex is: $(6, 8)$

5 0

3 years ago

How many triangles exist with the given angle measures?

sesenic [268]

Answer:

The answer would be one triangle. it is only one triangle because the sum of the angles of any triangle have to equal 180°. So if you add all of the angles you gave us, that would equal 180°.

I hope that was the answer you were looking for.

Step-by-step explanation:

4 0

3 years ago