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2 years ago

Which of the following expressions is equivalent to (2x + 3)(x2 – 7)?

Mathematics

2 answers:

balu736 [363]2 years ago

7 0

You didn't give any choices but I am still going to solve this.

First let's separate this a little bit.

(2x+3)(x^2-7)

=2x(x^2-7)+3(x^2-7)

Now we can multiply these in again.

=2x^3-14x+3x^2-21

=2x^3+3x^2-14x-21

miv72 [106K]2 years ago

5 0

Step-by-step explanation:

what are the following expressions????

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It say to state weather each figure is a polyhedron

Nimfa-mama [501]

A polyhedron is a three dimensional figure in which each side is made up of other two dimensional geometric figures, like triangles, hexagons, etc.

3 0

2 years ago

If one tosses a coin three times, write dow nthe possible observed number of heads and their probabilities

seropon [69]

You need to find the probability of Heads, Heads, Heads in 3 tosses;

P(HHH)= (1/2)(1/2)(1/2) <-- each toss has 2 possibilities and heads is one
P(HHH)=1/8

Therefore, the probability of flipping 3 heads on a fair coin is 1/8

Hope I helped :)

6 0

3 years ago

A rectangular container measuring 20 inches long by 16 inches wide by 12 inches tall is filled to its brim with water. If 850 cu

makkiz [27]

The new height of the water is = 9.34 inches (approx)

Step-by-step explanation:

Given, a rectangular container measuring 20 inches long by 16 inches wide by 12 inches tall is filled to its brim with water.

Let the new height of water level be x inches.

The volume of the container = (20×16×12) cubic inches

=3840 cubic inches

According to the problem,

3840 - (20×16×x) = 850

⇔3840 -320x = 850

⇔-320x =850-3840

⇔-320 x = -2990

$\Leftrightarrow x =\frac{2990}{320}$

⇔x = 9.34 inches

The new height of the water is = 9.34 inches (approx)

5 0

2 years ago

The graph of the quadratic function f is shown in the grid. Which of these best represents the domain of f?

Marysya12 [62]

Answer:

D) all real numbers

Step-by-step explanation:

domain refers to all of the x-values on the graph and this curve can extend indefinitely in both the positive and negative directions

6 0

1 year ago

Angle r and 92 are supplementary angles. what equation can you use to solve for r?

Oxana [17]

Answer:

88°

Step-by-step explanation:

<h3>supplementary angle are angles that add up to 180°</h3>

r+92= 180

r= 180-92

r = 88°

5 0

1 year ago