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3 years ago

4u^2-7u-7-15u^2-2u+3

Mathematics

2 answers:

Alex787 [66]3 years ago

6 0

Answer:

$-11u^{2} -9u-4$

Step-by-step explanation:

$-11u^{2}-7u-7-2u+3$

$-11u^{2} -9u-7+3$

$-11u^{2} -9u-4$

sp2606 [1]3 years ago

3 0

Answer:

$- 11 {u}^{2} - 9u - 4$

Step-by-step explanation:

1) Collect like terms.

$( {4u}^{2} - {15u}^{2} ) + ( - 7u - 2u) + ( - 7 + 3)$

2) Simplify.

$( { - 11u}^{2} - 9u - 4)$

Therefor, the answer is ( - 11u² - 9u - 4).

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Whats 3.8412 in place values

ELEN [110]

3 in the hundred-thousand place, 8 in thousands place, 4 in the hundreds place, 1 in the tens place, 2 in the one's place.

5 0

3 years ago

A species of animal is discovered on an island. Suppose that the population size of the species can be modeled by the following

andriy [413]

Answer:

The initial population size is of 58.

The population size of the specie after t years is given by:

$P(t) = \frac{520}{1 + 8e^{-0.3t}$

Step-by-step explanation:

Population size of the specie:

The population size of the specie after t years is given by:

$P(t) = \frac{520}{1 + 8e^{-0.3t}$

Initial population size

This is P when $t = 0$ , that is, $P(0)$ . So

$P(0) = \frac{520}{1 + 8e^{-0.3*0} = \frac{520}{1+8} = \frac{520}{9} = 57.7$

Rounding to the nearest number, 58

The initial population size is of 58.

6 0

3 years ago

A teacher asked his students to solve the equation w-15=22. One student incorrectly said that the solution is 7. What is the cor

jonny [76]

Answer:

$w= 37$

Step-by-step explanation:

The student used the wrong property of equality.

When you undo a number to get a letter by itself, you should do the opposite operation of the number said. The student subtracted 15 from 22 instead of adding 15 to 22.

Use the addition property of equality to isolate w.

$w(-15+15)=22+15\\w=37$

3 0

3 years ago

The Morris family drove 368.5 miles in 5.5 hours. Find the average rate of speed

yuradex [85]

Answer:

67 mph

Step-by-step explanation:

A method you'd want to remember is r = d/t, or rate equals distance divided by time.

Since the Morris family drove 368.5 miles in 5.5 hours, you'd divide the distance by 5.5.

(368.5/5.5) = 67 miles per hour.

So their average rate is 67 miles per hour.

Hope this helps.

3 0

3 years ago

<1 and <2 are supplementary angles. m <1 is 4y+7, and m<2 is 9y+4. Find m<2.

Yuliya22 [10]

Okay, so supplementary angles = 180 degrees.

Starting equation : 4y + 7 + 9y + 4 = 180

Combine like terms : 13y + 11 = 180

Subtract 11 from both sides : 13y = 169

Divide 13 from both sides : y = 13

Insert y value into original m<2 equation : 9(13) + 4

Solve : 121 degrees

If you want to check your work, all you have to do is insert y value into original m<1 equation and then add both m<1 and m<2. If they equal 180, your answer is correct.

4(13) + 7 = 59

59 + 121 = 180

4 0

3 years ago

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