How do you write -2×^2 (-5x^2+4x^3) in standard form?

Somebody help me with this math plz!!!

Leya [2.2K]

Answer:

-60 miles per hour

Step-by-step explanation:

3 0

3 years ago

Solve the given inequality. Describe the solution set using the set builder or interval notation. Then graph the solution set on

Sophie [7]

Answer: THIRD OPTION.

Step-by-step explanation:

Given the following inequality:

$3(x-5)\geq 6$

You can follow these steps in order to solve it:

1. Apply Distributive property on the left side:

$3(x-5)\geq 6\\\\(3)(x)+(3)(-5)\geq 6\\\\3x-15\geq 6$

2. Add 15 to both sides of the inequality:

$3x-15+(15)\geq 6+(15)\\\\3x\geq 21$

3. Finally, divide both sides of the inequality by 3:

$\frac{3x}{3}\geq \frac{21}{3}\\\\x\geq 7$

The symbol is $\geq$ means "Greater than or equal to", and indicates that 7 is include in the solution.

Therefore, the solution can be expressed as:

$[7, \infty)$

Now you must mark this point with a closed dot on the number line and shade everything to the right.

8 0

3 years ago

What is the sum of interior angles of a convex nonagon

zmey [24]

A nonagon has 9 sides, so n = 9

S = sum of the interior angles
S = 180*(n-2)
S = 180*(9-2)
S = 180*7
S = 1260

Answer is choice B

8 0

3 years ago

From a height of 50 meters above sea level on a cliff, two ships are sighted due west. The angles of depression are 61° and 28°.

Olenka [21]

Answer:

The ships are 66 meters apart.

Step-by-step explanation:

For the sake of convenience, let us label ships A and B

As shown in the figure, the distances to the ships from right triangles.

The distance to the ship A is $d_1$ and it is given by

$tan (61^o)= \dfrac{50}{d_1}$

$d_1=\dfrac{50}{tan (61^o)}$

$\boxed{d_1= 27.71m}$

And the distance to the ship B is $d_2$ and is given by

$tan (28^o)= \dfrac{50}{d_2}$

$d_2=\dfrac{50}{tan (28^o)}$

$\boxed{ d_2=94.04m}$

Therefore, the distance $d$ between the ships A and B is

$d= d_2-d_1=94.04-27.7\\\\\boxed{d=66m}$

In other words, the ships are 66 meters apart.

8 0

3 years ago

Read 2 more answers

In a recent study, volunteers who had 8 hours of sleep were three times more likely to answer questions correctly on a math test

kumpel [21]

Answer:

(c) the sample is amount of sleep the volunteers got in the study.

Step-by-step explanation:

sample: this is a small part that is intending to show what a big part is all about.

volunteer: a person who does something willingly.

6 0

4 years ago