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3 years ago

5

The length of a rectangle is 8 more than its breadth. If the perimeter of a rectangle is 84 cm. Find the dimensions of the recta

ngle

1 answer:

tiny-mole [99]3 years ago

3 0

Step-by-step explanation:

84 = 2(l+b)

L+b = 84 / 2

L+b = 42

There fore..

Length is 42 and breadth is 42 - 8

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A train leaves boston at 2:00 pm. a second train leaves the same city in the same direction at 6:00 pm. the second train travels

AURORKA [14]

$\boxed {\boxed { \text {Distance = Speed x Time}}}$

<u>First Train:</u>
Time taken = 9 hours (2pm to 11pm)
Let the speed be x
Distance = Time x Speed = 9x

<u>Second Train:</u>
Time taken = 5 hours (6pm to 11pm)
Speed = x + 48
Distance = Time x Speed = 5(x + 48)

Since both the distance they traveled are the same, we equate the distance to solve for x.

<u>Solve for x:</u>
9x = 5(x + 48)
9x = 5x + 240
4x = 240
x = 60

<u>Find the speed:</u>
x = 60 mph
x + 48= 108 mph

Answer: The spend of the two trains are 60 mph and 108 mph.

3 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Cfrac%7Ba-3b%7D%7Ba%2B2b%7D%20%3D%20%5Cfrac%7B4%7D%7B3%7D" id="TexFormula1" title="\frac{a-3

choli [55]

Answer:

$a:b = -17:1$

Step-by-step explanation:

Given

$\frac{a-3b}{a+2b} = \frac{4}{3}$

Required

Find a:b

$\frac{a-3b}{a+2b} = \frac{4}{3}$

Cross Multiply

$3(a-3b) = 4(a+2b)$

Open brackets

$3a - 9b = 4a + 8b$

Collect Like Terms

$3a - 4a = 8b+9b$

$-a = 17b$

Divide through by -b

$\frac{-a}{-b} = \frac{17b}{-b}$

$\frac{a}{b} = \frac{17}{-1}$

$\frac{a}{b} = \frac{-17}{1}$

Represent as a ratio

$a:b = -17:1$

5 0

3 years ago

anyone very good in maths and want to be my friend? Don't answer for points if you're not I will report you.

Minchanka [31]

Answer:

what's the equation??

Step-by-step explanation:

I'll help anytime

8 0

3 years ago

What number can be added to 9 to get result of 0

Aliun [14]

To solve this problem, we should set up an equation, letting x be the unknown number.

9 + x = 0

Next, we should subtract 9 from both sides to cancel out the +9 on the left side of the equation and get the variable alone.

x = -9.

Therefore, the number you are looking for is -9.

6 0

3 years ago

Read 2 more answers

8th math , plwase help

astra-53 [7]

Interior angles of triangles equal 180.

So angleTUV = 24 degrees

A straight line will equal 180 degrees. If angle U is 24 degrees in the interior angle, the exterior is 156 degrees.

Angle VUX is 156 degrees

3 0

3 years ago