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3 years ago

Find each sum or difference. Show your work. (4x-3x^2+5)+(2x^2-5x+1) Plz help!

2 answers:

7 0

<span>(4x - 3x</span>²<span> + 5) + (2x</span>²<span> -5x + 1)

</span>= 4x - 3x² + 5 + 2x² - 5x + 1 //Open brackets

= -x² - x + 6 //Combine like terms

MissTica3 years ago

6 0

Hey there :)

( 4x - 3x² + 5 ) + ( 2x² - 5x + 1 )

Combine like-terms

- 3x² + 2x² + 4x - 5x + 5 + 1
- 1x² - 1x + 6

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Total volume of tree?

Salsk061 [2.6K]

Answer:

9,000 cubic feet (250 m3) of wood in the branches.

Step-by-step explanation:

6 0

3 years ago

On Tuesday and Wednesday of last week I left home for school at the same time. On Tuesday I drove 40 mph (miles per hour) on my

meriva

Answer:

16.67 miles

Step-by-step explanation:

We have to:

t = time (in hours) required to arrive on time.

Now the time that is late or earlier, they give it in minutes, therefore it must be spent in hours:

In other words, 3 minutes late is 3/60 hours late, therefore:

t1 = t + 3/60

2 minutes before is 2/60 hours before, therefore:

t2 = t - 2/60

The distance is the same in both directions, so v1 * t1 = v2 * t2

We know that v1 = 40 and v2 = 50 by replacing:

40 * (t + 3/60) = 50 * (t - 2/60)

40 * t + 2 = 50 * t - 5/3

40 * t - 50 * t = -5/3 - 2

-10 * t = -3.66

t = 3.6 / 10

t = 0.366 hours = 0.366 * 60 = 22 minutes

That is, in the first case it takes 25 (22 + 3) minutes, therefore:

40 * 25/60 = 16.66 miles

In the second case it takes 20 (22 -2) minutes, therefore:

50 * 20/60 = 16.66 miles

Therefore lives 16.67 miles from work

5 0

2 years ago

$7600 is invested for one year, part at 4% and the remainder at 5%. The income from the two investments is $338. Find the amount

wariber [46]

The amount invested at 4% is $4,200. This problem can be solved by using two linear equation with two different variables which represent the investment's partition and the investment's return. The first equation is x+y=$7,600 and the second equation is 0.04x + 0.05y=$338, then you must substitute the y variable in the second question with the first equation (0.04x + 0.05($7,600-x)=$338). Therefore, you will get a new equation to solve the problem which is 0.04x+380-0.05x=338 resulting x=$4,200.

8 0

2 years ago

I got 60 questions correct on my science test if I received a score of 75% how many questions were on the test

Ann [662]

Answer:

80 questions

Step-by-step explanation:

You can write a proportion to solve this. A proportion is an equation that sets two ratios equal.

The first ratio is 60/x where x is the number of questions. The second ratio is 75/100. This is the percent you got on the test. Cross multiply to sole for x.

$\frac{60}{x} = \frac{75}{100}\\ 60*100 = 75(x)\\6000 = 75x\\80 = x$

3 0

3 years ago

Which expression is equivalent to -7(y - 2)

Neko [114]

The expression equivalent to -7(y - 2) is -7y + 14

<h3>Which expression is equivalent to -7(y - 2)?</h3>

Given the expression; -7(y - 2)

We expand the expression by multiplying each element inside the parentheses the element out i.e -7

-7(y - 2)

[ -7 × y and -7 × -2 ]

-7y + 14

Therefore, the expression equivalent to -7(y - 2) is -7y + 14.

Learn more about expressions here: brainly.com/question/13947055

#SPJ1

5 0

1 year ago