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madam [21]
3 years ago
8

The area of a trapezoid is given by the formula A=h/2(a+b) . Solve the formula for b.

Mathematics
1 answer:
Komok [63]3 years ago
4 0

Answer:

(2A)/h -a =b

Step-by-step explanation:

A= [h(a+b)]/2       I rewrote the formula, because h and a+b are in the numerator.

2A=h(a+b)  Multiply both sides of equation by 2

(2A)/h= a+b Divide both side by h

(2A)/h -a= b Subtract a from both sides

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a card is chosen from a standard deck, then a month of the year is chosen. find the probability of getting a face card and june​
Irina-Kira [14]

Answer:

Probability of chossing a face card and the month of june = 0.019

Step-by-step explanation:

Let A be the event that a face card is chosen from a deck of 52 cards

And

B be the event that a month is being chosen from 12 months of an year

So,

n(S)for A=52

n(S)for B=12

As a deck of card has total of 12 face cards so

P(A)=12/52

=3/13

P(B)=1/12

As both the events are independent, the probability of A and B is the product of both events’ probabilities.

P(A and B)= P(A)*P(B)

=3/13*1/12

=3/156

=0.019

4 0
3 years ago
What is -5.8+ (2.5) Evaluate expression
sweet [91]

-5.8 + (-2.5)

is just 5.8 - 2.5

Which is -8.3

8 0
3 years ago
Which of the following would cause an increase in heat? freezing compression stirring friction
mojhsa [17]

Answer: Your answer would be friction.

Step-by-step explanation:

Friction produces heat because it causes the molecules on rubbing surfaces to move faster and develop more energy.

Hope this helps!

8 0
3 years ago
the length of a rectangle is 3 more than twice its width find the dimensions of the rectangle if the perimeter is 48 inches
irinina [24]
So first you would set up the equation of 48 = x + x + 3(2)x + 3(2)x. Perimeter is equal to width + width + length + length-- x is width, length is 3 times 2x, so that's where that equation comes from. You combine like terms and get 48 = 2x + 6x + 6x or 48 = 14x. You then divide by 14 and get x ≈ 3.4. Then to find the dimensions you substitute it back to what I said the dimensions were. Width is x, so width is around 3.4. Length is 3 times twice the width (x) so 3(2x) or 6x. So you substitute ≈3.4 for x and get ≈20.6. The width is ≈3.4 and the length is ≈20.6 (the dimensions).
3 0
3 years ago
Nesesito ayuda cúanto es (-14)+(+14)=
galina1969 [7]

Answer:

0

Step-by-step explanation:

-14 + (+14)

-14 + 14

0

4 0
2 years ago
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