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3 years ago

9

There were d passengers in the train. 15% of all of them went in the first car, 20% went in the second car. How many passengers

were in the rest of the train?

1 answer:

vitfil [10]3 years ago

4 0

55% were in the rest of the train. it says "d" though, so I can't tell you the exact number.

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Can someone help me please i am so confused and its due today!!

deff fn [24]

Answer:

x is 20

Step-by-step explanation:

7 0

3 years ago

1. If one side of the square is 12in, what is the perimeter and area of the parallelogram?

gayaneshka [121]

Answer:

Not sure for 1. Area might be 144. Perimeter might be 50. I got perimeter by finding slant height of the parallelogram and then substituting it to the perimeter formula (P=2(a+b) where a is a side and b is a base). I found area by just multiplying 12*12 since to find area of parallelogram, it is base x height.

2. 45, 135, 135

Step-by-step explanation:

2. We know that an isosceles trapezoid has congruent base angles and congruent upper angles, so if one base angle measures 45 degrees, the other base angle will also be 45 degrees.

For the upper angles, we know that diagonal angles are supplementary, so 180- base angle 1 (45 degrees)= upper angle 1

180-45=upper angle 1

upper angle 1 = 135 degrees

Mentioned above, upper angles are congruent, so upper angles 1 and 2 will be 135 degrees.

Check: The sum of angles in a quadrilateral is equal to 360 degrees. We can use this to check if our answer is correct.

135+135=270 degrees (sum of upper angles)

45+45= 90 degrees (sum of base angles)

270+90=360

So the angle measures of the other three angles are 135, 135, and 45.

Hope this helps!

7 0

2 years ago

Mr. Schordine wants to fill up enough helium balloons to allow him to fly through the skies. He weighs 84 kilograms. He knows th

Cerrena [4.2K]

Answer:

There is needed around 311 balloons to fulfill Mr. Schordine’s dream of flight.

Step-by-step explanation:

First, we need to calculate the volume of each balloon by considering the balloons as a sphere:

$V = \frac{4}{3}\pi r^{3}$

Where:

r: is the radius = 0.4 meters

$V = \frac{4}{3}\pi r^{3} = \frac{4}{3}\pi (0.4 m)^{3} = 0.27 m^{3}$

Knowing that 1 m³ of helium is able to lift about 1 kg, that Mr. Schordine weights 84 kg, and that each ballon has 0.27 m³ of helium, the number of balloons needed are:

$N = \frac{1 m^{3}}{1 kg}*84 kg*\frac{1 balloon}{0.27 m^{3}} = 311.1 \: balloon$

Therefore, there is needed around 311 balloons to fulfill Mr. Schordine’s dream of flight.

I hope it helps you!

6 0

3 years ago

70% of Ms. Miller's class passed the test on the first try. Those who failed were able to retake and half of those students pass

MrRissso [65]

Answer:

85%

Step-by-step explanation:

Calculate how many students passed on their first try. 20 x 70% is 14, so 14 students passed on their first try.
6 students retook the test. Half of 6 is 3. Add 3 to the 14 students that passed earlier.
Calculate the percent with the equation 17/20 = 0.85. 0.85 = 85%.

5 0

3 years ago

The sum of two number is 45.if one of them is 27 ,find another

tekilochka [14]

Answer:

is 18

Step-by-step explanation:

simple you just subtract 27 for the original number

8 0

3 years ago

Read 2 more answers