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3 years ago

What is the product? (5r + 2) (3r -4)

Mathematics

1 answer:

Tanzania [10]3 years ago

7 0

Answer:

15r² - 14x - 8

Step-by-step explanation:

5x * 3x = 15x²
5x * -4 = -20x
2 * 3x = 6x
2 * -4 = -8

Now add your products,

15x² + -20x + 6x + -8 = 15x² - 14x - 8

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A train leaves Los Angeles at 2 p.m. heading north at 50 mph. If the next train leaves three hours later and also heads north at

Mamont248 [21]

Since the first train has been travelling for 3 hours, we have the following equations:
$d=50t+3*50=50t+150$
$d=60t$

We want to know when they will be equal, so set these equal to eachother:
$60t=50t+150$
$10t=150$
$t=15$

So 15 hours after the second train leaves, they will be at the same distance. This is at 8AM since the second train leaves at 5PM.

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3 years ago

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Need the answer asap pls

sergiy2304 [10]

Answer:

C. {-9,-3}

Step-by-step explanation:

$|k+6|=3$ gives $k+6=3$ if $k + 6 \geq 0$ . This gives $k=-3$ , which is valid.

It can also give $-(k+6) = 3$ if $k + 6 < 0$ . This gives $k=-9$ , which is valid.

Hence the solutions are $k=-9 \vee k=-3$ .

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2 years ago

What is the solution to 2x-8<12?<br> x<2<br> x<8<br> x<10<br> x<40

maw [93]

I believe the answer is x⁢10 if it’s incorrect i’m so sorry

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2 years ago

If the circumference of a circle measures 3 4 π cm, what is the area of the circle in terms of π? A) 9 8 π cm2 B) 3 8 π cm2 C) 3

Paladinen [302]

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2 years ago

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What is the distance rounded to the nearest tenth between the points (2 -2) and (6 3)

kotegsom [21]

Answer:

The distance between the points is approximately 6.4

Step-by-step explanation:

The given coordinates of the points are;

(2, -2), and (6, 3)

The distance between two points, 'A', and 'B', on the coordinate plane given their coordinates, (x₁, y₁), and (x₂, y₂) can be found using following formula;

$l = \sqrt{\left (y_{2}-y_{1} \right )^{2}+\left (x_{2}-x_{1} \right )^{2}}$

Substituting the known 'x', and 'y', values for the coordinates of the points, we have;

$l_{(2, \, -2), \ (6, \, 3) } = \sqrt{\left (3-(-2) \right )^{2}+\left (6-2 \right )^{2}} = \sqrt{5^2 + 4^2} = \sqrt{41}$

Therefore, the distance between the points, (2, -2), and (6, 3) = √(41) ≈ 6.4.

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3 years ago