Mathematics, 07.12.2019 13:31 carrieaj08

Ineed , these tree make me bored , can you me .
you so much

Ineed , these tree make me bored , can you me . you so much

Answers: 3

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Answer from: sarah957

1) question 18 of 20
-7x/5-(4y)=7
4y=-7x/5-(7)
y=-7x/20-(7/4).

if x=0 ⇒y=-7*0/20-7/4=-7/4 ⇒y-intercept is-7/4
fi y=0 ⇒ -7x/20-(7/4)=0
-7x/20=7/4
x=(7*20) / [4*-(7)]=-5 ⇒x-intercept is -5

Solution: D) x-intercept is -5 ; y-intercept is -7/4

Question 19 of 20
P₁=(x₁,y₁)
P₂=(x₂,y₂)
m=slope

m=(y₂-y₁) / (x₂-x₁)

Then:
A(1,7)
B(10,1)

m=(1-7) / (10-1)=-6/9=-2/3.

Solution: B)-2/3

Question 20 of 20:
y-y₀=m.(x-x₀)
A(4,3)
B(-4,-2)

m=(-2-3) / (-4-4)=-5/-8=5/8

y-3=(5/8).(x-4)
y=5x/8-(20/8)+3
y=5x/8-(20/8)+24/8
y=5x/8+(4/8)
y=5x/8+1/2

solution: B) y=5x/8+1/2

Answer from: Quest

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation:

Im so sorry im asking for too much .. i barely understand math!

Answer from: Quest

starting with:

5 + x - 12 = 2x - 7

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)

5 - 12 = x - 7 (combine and cancel x's from both sides)

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)

0 = x (add numbers together on both sides)

so in order for the equation to be true, x must be 0.

trying x = -0.5

5 + x - 12 = 2x - 7 (original equation)

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)

5 + -0.5 - 12 = -1 - 7 (did multiplication)

-7.5 = -8 (did addition on both sides)

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.

trying x = 0

5 + x - 12 = 2x - 7 (original equation)

5 + 0 - 12 = 2(0) - 7 (plug in value of x)

5 + 0 - 12 = 0 - 7 (did multiplication)

-7 = -7 (did addition on both sides)

since -7 equals -7, that demonstrates that the value of 0 for x is correct.

trying x = 1

5 + x - 12 = 2x - 7 (original equation)

5 + 1 - 12 = 2(1) - 7 (plug in value of x)

5 + 1 - 12 = 2 - 7 (did multiplication)

-6 = -5 (did addition on both sides)

since -6 is obviously not equal to -5, the value of 1 for x is wrong.

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Ineed , these tree make me bored , can you me .
you so much

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