MATHEMATICS MIDDLE SCHOOL

Please hurry!!!! 20points!!!
Is my answer right.
Please hurry!!!! 20points!!! Is my answer right. - 1

Answers

Answer 1
Answer:

Answer:

Yes

Step-by-step explanation:

The two angles that are both acute (B and C in this case) add up to 90 degrees. That's because a right triangle has 1 angle that = 90 and every triangle has 180 degrees.

<B + <C + 90 = 180

<B + <C = 180 - 90

<B + <C = 90

Equation

2x + 15 + 5x - 2 = 90       Collect like terms

Solution

7x + 13 = 90                      Subtract 13 from both sides

7x = 90 - 13                       Subtract

7x = 77                               Divide by 7

x = 77/7                              Divide

x = 11                                  Substitute

<B

<B  = 2x + 15

<B = 2*11 + 15

<B = 37  which makes your answer right

Answer 2
Answer:

B. Is correct


37°


Hope it helps

Related Questions

A pig weighs 9.8 pounds. Convert the pigs weight to ounces
What is the GCF of 8 and 12
Round 76340 to the nearest thousand
Factor the following.
Help please I give thanks

What is 22/36 in simplest form

Answers

(22)/(36) \n \n GCF = 2 \n \n 22 / 2 = 11 \n \n 36 / 2 = 18 \n \n (11)/(36) \n \n Answer: \fbox {11/36} \ or \ \fbox {0.6111}
The answer is 11/18 

22÷2=     11
___         __
36÷2=      18

What shape best describes the cross section cut at an angle to the base of a right rectangular prism

Answers

Answer:

Parallelogram.

Step-by-step explanation:

A  rectangular prism has a rectangle as its base . A rectangle is a parallelogram with all angles 90 degrees and opposite sides of equal length.

When we cut a cross section is  cut at an angle to the base of a right rectangular prism  the shape is that of a parallelogram. A parallelogram has opposite sides parallel and equal.
The answer is parallelogram

If the perimeter of a square is 40 mm how long is each side of the square

Answers

They are all 10mm long because 10*4 is 40mm so hoped I helped
Since the perimeter of the square is 40 then you will divide 40 by 4 wich will equal 10, so each side of the square is 10 mm long.

My Work:

40/4= 10
10+10+10+10=40 or 10x4=40 

what is 89 divided by 6 in long divison

Answers

89 divided by 6 = 14.83… the … are 3's but they go on forever, so you round to the hundredths and the 3 doesn't bump the 3 up so the answer is 14.83

A 500 g model train car traveling at 0.8 m/s collides with a 300 g stationary car. The cars hook up and move off down the track together. How fast are they going? ( also how do I do it )

Answers

Answer:

0.5ms^(-1)

Step-by-step explanation:

Let v be the speed after the collision of both the cars.

Now, momentum is given by: mass × velocity, then by equating the total momentum before and after the collision of the two cars, we get

500{*}0.8+300{*}0=(500+300)v

⇒400+0=800v

⇒400=800v

⇒v=0.5ms^(-1)

Thus, they are moving at the velocity of 0.5ms^(-1)

Answer:

0.5 m/s

Step-by-step explanation:

A 500 g model train car traveling at 0.8 m/s collides with a 300 g stationary car.

Initial velocity of train, v_T=0.8\ m/s

Initial velocity of car, v_C=0\ m/s

Mass of train, m_T=500\ g

Mass of car, m_C=300\ g

The cars hook up and move off down the track together.

Let the final velocity of car and train, v_T=v_C=v

Using conservation of momentum,

Momentum before collision = Momentum after collision

m_T* v_T+m_C* v_C=(m_T+m_C)* v

500* 0.8+300* 0=(500+300)* v

v=(400)/(800)

v=0.5\ m/s

Hence, After collision they will going with 0.5 m/s

Because of the unexpected cold weather,the cost of tomatoes increased 50 percent in one month.If the cost after the increase was 60 cent per pond,what was the cost before the increase?

Answers

A 50% increase is just taking the original amount and adding half of that towards the amount.

Example : 50% of 100 is 50 so a 50% increase to 100 would be 150

a formula for this would be X + (1/2×X) = Y

in your case we're working backwards with the known being 60

We can just plug in reasonable values for X until we get 60

50% of 40 is 20

40 + 20 = 60

so the original amount was 40
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