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zheka24 [161]
2 years ago
14

Trains Two trains, Train A and Train B, weigh a total of 515 tons Train Ais heavier than Train

Mathematics
1 answer:
Law Incorporation [45]2 years ago
7 0

Answer:

By using linear equation

Step-by-step explanation:

a+b=515......Equation 1

a-b=475.........Equation 2

From equation 1

a=515-b

Putting value of a in Equation 2

515-b - b=475

515- 2b=475

515-475=2b

2b=515-475

2b=40

b=40/2

b= 20

Putting b=20 in Equation 1

a+20=515

a=515-20

a= 495

a=495

b= 20

Check whether equation hold true

a+b=515

495+20=515

a-b= 475

495-20=475

Please mark it branliest if the answer is little bit satisfactory. Thanking in anticipation.

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A card is randomly chosen from the cards in the image. Find the probability of choosing the cards with either Q or R on them.
Afina-wow [57]

The probability of choosing cards either Q or R when a card is drawn from a deck of 8 cards is 0.25.

Given that a card is randomly chosen from 8 cards shown in figure.

We have to calculate the probability of choosing either Q or R when a card is drawn from those 8 cards.

Probability means calculating the likeliness of happening an event among all the events possible. It lies between 0 and 1. It cannot be negative.

Number of cards=8

Number of repeated cards=0

Number of cards showing Q and R =1 each.

Probability of getting Q or R is P(X=Q)+P(X=R)

= 1/8+1/8

=2/8

=1/4

=0.25

Hence the probability of getting either P or Q when a card is drawn from 8 cards is 0.25.

Learn more about probability at brainly.com/question/24756209

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6 0
2 years ago
Frank's car is 12 feet long. Alex's car is 108 inches
kirill115 [55]

Answer:

21 feet

Step-by-step explanation:

108 inches / 12 = 9 feet.

9+12=21 feet

5 0
3 years ago
Determine the equation whose roots are –1 –5 and –3
Alexus [3.1K]
Well you are given the roots.

if we have 3 it would.have to be x^3. So something like:

y = ax^3 + bx^2 + cx + d

this could.also be written:

y = (x + a) (x + b) (x + c)

when you are able to write it like this, we know that the opposite of a, b, and c are roots. this is because if we can make any of the insides of the 3 parenthesis equal 0 then y = 0 and that x.is a root. Well if we know the 3 roots that x will be then we just have to figure out the a, b, and c. So let's plug our roots in.

y = (-1 + a) (-5 + b) (-3 + c)

now we have to make each parenthesis equal 0 to find what a, b, and c should be. It is obvious a = 1 to make.that one zero and b = 5 and c = 3. So we know a, b, and c. now let's plug.those into our first equation.

y = (x + 1) (x + 5) (x + 3)

this is your equation. You can multiply out if necessary
5 0
3 years ago
HELP ME PLEASE!!!! Giving 40 points!!!!!!!
weeeeeb [17]
For the rectangle: l x w = Area
l = 18
w = 18

18 x 18 = 324

If 16m is for dash line

1/2bh
1/2(16)(16)
4(16) = 64

1/2bh
1/2(8)16
8(8) = 64

324 + 64 + 64 = 452

Your area should be 452m²

hope this helps
4 0
3 years ago
See attachment below. Please answer. Thank you.
KonstantinChe [14]

Hi

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