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3 years ago

Help me out here I’m lost

Mathematics

1 answer:

omeli [17]3 years ago

7 0

Answer:

y= -4/7x+7

Step-by-step explanation:

The slope intercept form is y=mx+b.

slope/m= -4/7

y-intercept/b= 7

All you have to do is plug in those numbers to get the equation in slope intercept form.

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108 = 9r<br> I need help with this plz

kondor19780726 [428]

Answer:

r = 12

Step-by-step explanation:

108 = 9r | Given expression

12 = r | Divide both sides by 9. 108 becomes 12 and 9r becomes r.

3 0

3 years ago

Read 2 more answers

Write down the quadratic equation whose roots are $x = -7$ and $x = 1,$ and the coefficient of $x^2$ is 1. Enter your answer in

pav-90 [236]

<h2>Steps:</h2>

So firstly, since we know that the coefficient of x² is 1, this means that this is our base equation:

y = x² + bx + c

Now, since we know that the roots are -7 and 1, set y = 0 and set x = -7 and 1 and simplify:

$0=(-7)^2+b(-7)+c\\0=49-7b+c\\-49=-7b+c\\\\0=1^2+b(1)+c\\0=1+b+c\\-1=b+c\\\\-49=-7b+c\\-1=b+c$

Now with this, we can set up a system of equations to solve for b and c. For this, I will be using the elimination method. For this, subtract the 2 equations:

$\begin{alignedat}{2}-49&=-7b+c\\-(-1&=b+c)\\-48&=-8b\end{alignedat}$

Now that the c variable has been eliminated we can solve for b. For this, divide both sides by -8 and your first part of your answer is b = 6.

Now that we know the value of b, plug it into either equation to solve for c:

$-49=-7(6)+c\\-49=-42+c\\-7=c\\\\-1=6+c\\-7=c$

<h2>Answer:</h2>

<u>Putting it together, your final answer is x² + 6x - 7 = 0.</u>

4 0

3 years ago

Evaluate: if x = 3 and y = 6 x(2x + x2 – 8y + 16)

kumpel [21]

Answer:

-60

Step-by-step explanation:

Og problem: x(2x + 2x - 8y + 16)

Substitution: 3(6 + 6 - 48 + 16)

Solve: 3(12 - 48 + 16)

3(-36 + 16)

3(-20) = -60

3 0

3 years ago

What does negative 2 over 7 > −4 indicate about the position of negative 2 over 7 and −4 on the number line?

jeyben [28]

-4/7 > -2

If it is greater it goes to the right, and if it is less it goes to the left.

-4/6 is located to the right of -2

6 0

3 years ago

The length of a photograph is 4 in. greater than its width. The area of the photograph is

Aleks [24]

Answer:

208.........not sure but this can be the ans

8 0

3 years ago