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viva [34]
3 years ago
9

Solve the system of equations. 2x + 7y = 3 x= -4y

Mathematics
1 answer:
I am Lyosha [343]3 years ago
5 0

Answer:

(12, -3)

Step-by-step explanation:

You can solve it algebraically or graphically. Graphically you find the intersection point. Algebraically with substitution/elimination.

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Ahhh I’m stuck on this one please help
vodomira [7]

Answer:

1.20 ÷ 4 = 0.30 per unit

Please mark as brainliest;)

8 0
2 years ago
Read 2 more answers
Ac=r+d for a solve equation for the indicated variable
konstantin123 [22]

\boxed{a=\frac{r+d}{c}}

<h2>Explanation:</h2>

Here we have the following expression:

ac=r+d

And the question asks for solving the equation for the variable a. So we need to divide both sides of the equation by c:

ac=r+d \\ \\ \frac{ac}{c}=\frac{r+d}{c} \\ \\ \\ But: \\ \\ \frac{c}{c}=1 \\ \\ \\ So: \\ \\ \boxed{a=\frac{r+d}{c}}

<h2>Learn more:</h2>

Solving equations: brainly.com/question/10643312

#LearnWithBrainly

5 0
3 years ago
Find the missing side length of the right triangle. show work.
motikmotik

Answer:

6.32

Step-by-step explanation:

To find the side length on a right angled triangle we follow The Pythagorean Theorem:

{a}^{2}  +  {b}^{2}  =  {c}^{2}

c being the hypothesis (longest side: the hypotenuse is always opposite the right angle)

so..

{6}^{2}  +   {2}^{2}  =  {x}^{2}  \\ 36 + 4 =  {x}^{2}  \\ 40 =  {x}^{2} \\  \sqrt{40}   =  \sqrt{ {x}^{2} } \\

6.32 = x

8 0
2 years ago
Read 2 more answers
What is the substitution of -6x-8y=-20 and x+6y=-6
ale4655 [162]

Substitution doesn't work for this, but elimination does.

-6x-8y=-20 +6( x+6y=-6)

-6x-8y=-20 + 6x+36y=-36

-6x and 6x cancel each other, add -8 and 36 to get 28, and -20 and -36 to get -56.

28y=-56

divide by 28 on both sides.

Y= -2

Then substitute y into one of the equations.

x+6(-2)=-6

x-12=-6

x=6

The ordered pair is (6,-2).

5 0
3 years ago
Read 2 more answers
-3/7 greater or less than -2/5
Phantasy [73]
-3/7 is greater than -2/5


how I found this do 3÷7 and this will give you a decimal of 0.4285. While doing 2÷7 equals 0.4


hope this helps
8 0
4 years ago
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