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dimaraw [331]
3 years ago
10

I need help on this question that's past due 30 points

Mathematics
1 answer:
denpristay [2]3 years ago
5 0

Answer:

C

Step-by-step explanation:

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I need a step by step explanation on how you solved the equation.
Ghella [55]

Answer: x=3 and y=−2

Step-by-step explanation:

x=−2y−1;4x−4y=20

Step: Solve x=−2y−1 for x:

Step: Substitute−2y−1 for x in 4x−4y=20:

4x−4y=20

4(−2y−1)−4y=20

−12y−4=20(Simplify both sides of the equation)

−12y−4+4=20+4(Add 4 to both sides)

−12y=24

−12y

−12

=

24

−12

(Divide both sides by -12)

y=−2

Step: Substitute−2 for y x=−2y−1:

x=−2y−1

x=(−2)(−2)−1

x=3(Simplify both sides of the equation)

7 0
3 years ago
Help me please<br>I want the step by step explanation!!​
DiKsa [7]

Answer: AB=√17, AD=√98,6

Step-by-step explanation:

AB²=BC²+AC²-2*BC*AC*cosACB

AB²=5²+4²-2*5*4*0,6=25+16-24=17

AB=√17

AD²=AC²+CD²-2*AC*CD*cosACD

cosACD=cos(180°-ACB)=-cosACB

AD²=4²+7²-2*4*7*(-0,6)=16+49+33,6=98,6

AD=√98,6

4 0
3 years ago
Read 2 more answers
1. Write an addition equation, a subtraction equation, and a multiplication equation that has -2 as a solution. Solve each equat
Sphinxa [80]
5 + -7 = -2
5 - 7 = -2
-1 x 2 = -2
7 0
3 years ago
Algebra Review: Pra<br> (4x-7)(2x+1)
ki77a [65]
2x - 6 = 2 • (x - 3)
2 = 0
x-3 = 0
x=3
7 0
3 years ago
Which value is the furthest from 0 on the number line?
evablogger [386]

Answer:-21.5

Step-by-step explanation:

It’s the furthest

3 0
3 years ago
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