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3 years ago

Write the word sentence as an equation. Then solve.

Mathematics

1 answer:

natima [27]3 years ago

5 0

Answer:25x=320=12.8

Step-by-step explanation:

a number=x

x*25=25x

25x=320

320/25=12.8

x=12.8

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A certain species of alligators is to be introducers into a swamp, and wildlife experts estimate the population will grow to P(t

Phoenix [80]

Answer:

3 years

Step-by-step explanation:

Note that:

P(0) = 803

So Tripling time ==> P(t) = 3*P(0) = 3*803 = 2409

Then we have an equation:

2409 = 803* $3^{\frac{t}{3} }$

<=> 3 = $3^{\frac{t}{3} }$

<=> 1 = $\frac{t}{3}$

<=> t = $3$

So the tripling time for this population of alligators is 3 years

6 0

3 years ago

Read 2 more answers

Please solve~I give brainliest! 1. 2x-5<1 2. 3x+7<16

NeTakaya

Answer:

1. x<3

2. x<3

Step-by-step explanation:

2x-5<1

Move constant to the right side and change its sign

2x<1+5

Add the Numbers

2x<6

Divide both sides of the inequality by 2

x<3

3x+7<16

Move constant to the right side and change its sign

3x<16-7

Subtract the numbers

3x<9

Divide both sides of the inequality by 3

x<3

4 0

3 years ago

What is 15 percent of 60 show a model to prove it

mart [117]

What is 15 percent of 60 60x.15=9

7 0

3 years ago

The Ray family went out to dinner The price of the meal was $38.95 The sales tax was 7% of the price of the meal. The tip was 18

Andrews [41]

Answer:

$49.18

Step-by-step explanation:

Dinner cost $38.95 before tax and tip are included.

Directions say to ADD 7% tip first so,

38.95 multiplied by 7%= 2.7265, Round up to $2.73

ADD $38.95 and $2.73 tax= $41.68

Now, multiply $41.68 by 18% to find the tip amount

$41.68 * 18%= 7.5024, Round to $7.50

ADD $41.68 and $7.50 to get answer: $49.18

4 0

3 years ago

A commercial jetliner with an air speed of 640 mi/hr leaves Chicago and flies due west at the same time that a small single-engi

Vilka [71]

Answer:

40 mph

Step-by-step explanation:

The speed of separation of the two airplanes traveling in opposite directions is the sum of their respective airspeeds:

640 mi/h + 180 mi/h = 820 mi/h

At the time of interest, their separation distance is ...

1500 mi + 550 mi = 2050 mi

Then the time it took to achieve that separation was ...

time = distance/speed = (2050 mi)/(820 mi/h) = 2.5 h

The actual ground speed of the jetliner was ...

speed = distance/time = 1500 mi/(2.5 h) = 600 mi/h

Since the airspeed of the jet is 640 mi/h, the speed of the air must have subtracted 40 mi/h from its headway.

The wind from the west is 40 mi/h.

_____

Check

The wind adds to the speed of the small plane, so its ground speed is ...

180 mph +40 mph = 220 mph

and the distance it travels in 2.5 hours is ...

distance = speed × time = (220 mi/h)(2.5 h) = 550 mi

This value matches the problem statement, so the answer checks OK.

7 0

3 years ago