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Vanyuwa [196]
4 years ago
12

Jack wants to simplify the expression below.

Mathematics
1 answer:
mamaluj [8]4 years ago
6 0

Answer:

5.3x - 4 .

Step-by-step explanation:

(6.7x -3) - (3.4x - 1) + (2x - 2)

1. using the commutative property:

= 6.7x - 3 +  2x - 2 - (3.4x - 1)      (we can remove the parentheses around the first 2 groups because they are added).

2. Using the distributive property on the last group:

= 6.7x - 3 + 2x - 2 - 3.4x + 1   (distributing the negative over the parentheses).

3. Now adding like terms we get:

5.3x - 4 (answer).

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Find the other x-intercept for the parabola defined by this equation: y=-4x^2+12x-8
bazaltina [42]

So, to find the x intercepts we first set x to 0 to get:

0=-4x^2+12x-8

Then, notice that all the terms are divisible by -4 so we can divide it out to get:

0=x^2-3x+2

Now, we want to see what two numbers add to -3 and multiply to 2. These two numbers have to both be negative, and the only two factors of 2 are 2 and 1, so our two numbers are -1 and -2. Now, we split -3x into -x and -2x and finish factoring:

0=x^2-x-2x+2 \implies \\ 0=x(x-1)-2(x-1) \implies \\ 0=(x-2)(x-1) \implies \\ x-1=0\implies x=1\\ x-2=0 \implies x=2 \\ x=1,x=2

Our two x intercepts would be (1,0) and (2,0).

6 0
3 years ago
-6x+4=8
Bogdan [553]

Answer:

X=2/3

Step-by-step explanation:

-6x+4=8

-6x=8-4

-6x=4

6x=-4

x=4/6

=2/3

HOPE THIS WORKS

5 0
3 years ago
the vertices of tri. PQR are P(-3,8), Q(-6,-4) and R(1,1). If you reflect tri. PQR across the x-axis , what will be the coordina
Alona [7]

P(-3,-8) Q(-6,4) R(1,-1). Because it reflects over the x-axis the x values stay the same and the y values change signs.

7 0
3 years ago
I need to know where did kellys collection go the most?
IrinaVladis [17]

Answer:

What options are there

Step-by-step explanation:


6 0
4 years ago
Read 2 more answers
Need an answer to 2/3 - 4
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-3.3333 is the answer
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3 years ago
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