All categories

3 years ago

Simplify. b (−3)∙(2a+b)−4(b−a) Plz and Thanks

Mathematics

1 answer:

tigry1 [53]3 years ago

5 0

Answer:

-6ab-3b^2-4b+4a

Step-by-step explanation:

Split the problem in half: b (−3)∙(2a+b) −4(b−a)

Solve the first half:

b(-3) = -3b

-3b x -2a = -6ab

-3b x b = -3b^2

First Half: -6a-3b

Solve the second half:

-4 x b = -4b

-4 x -a = 4a

Second Half: -4b+4a

Put it all back together: -6ab-3b^2-4b+4a

You might be interested in

What is 0.31111... as a fraction

KonstantinChe [14]

Answer: 14/45
explanation:

5 0

3 years ago

Read 2 more answers

The graph shows the solution to which system of equations?

Sedaia [141]

So let's start by guesstimating the slopes:
the green line has a slope close to -x, but more negative than that, possibly -2; the pink line has a slope close to +x, but higher towards +2.

Next let's look at the solution: the two lines intersect at the point (1, -1).
**you could just simple plug that x (1) into all the equations, but let's rule out answers anyway. ;)

A) is incorrect because the slopes of -1 and +1 are off from out predicted -2 and +2
B) is incorrect because of a similar reason, the slopes of +3 and +1 don't make any sense
C) Ooh, we do have a +2 and -2 for the slopes, and... violà! plug in 1 for the x's and we get -1 for the y in both equations
D) slopes are closer than in A and B, but plugging in 1 doesn't get us -1

So the correct answer is:
C) y = 2x - 3 and y = −2x + 1

6 0

3 years ago

Simplify (18x^4 – 3x^3 – 2x^3 + x^2 – 10 + 6), showing how you got your answer would be preferable!

Crazy boy [7]

Answer:

−

18x4−3x3−2x3+x2−10+6

−

18x4−3x3−2x3+x2−4

Combine like terms

Solution

−

Step-by-step explanation:

7 0

3 years ago

What is the area of a rectangle whose width is 6y units and whose length is 4y+2x-6 units?

ValentinkaMS [17]

Answer:

66473737

Step-by-step explanation:

747292929277273664646272727282891919919191919919192929298475756565665

6 0

3 years ago

The height h(n) of a bouncing ball is an exponential function of the number n of bounces.

Digiron [165]

Answer:

The height of a bouncing ball is defined by $h(n) = 6\cdot \left(\frac{4}{6} \right)^{n-1}$ .

Step-by-step explanation:

According to this statement, we need to derive the expression of the height of a bouncing ball, that is, a function of the number of bounces. The exponential expression of the bouncing ball is of the form:

$h = h_{o}\cdot r^{n-1}$ , $n \in \mathbb{N}$ , $0 < r < 1$ (1)