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2 years ago

Add. 7/4+9/-5 wrote your answer as a fraction in simplest form

Mathematics

2 answers:

IgorLugansk [536]2 years ago

5 0

Answer:

7/4 + 9/-5 =

Since the denominator of the second fraction is negative the sign will change from negative to positive

We will get

7/4 - 9/5

First find the LCM

LCM of 4 and 5 is 20

7/4 - 9/5 = 5(7) - 4(9)/ 20

Simplify

We get

35 - 36/20

= -1/20

Hope this helps

kondor19780726 [428]2 years ago

4 0

Answer:

-1/20

Step-by-step explanation:

7/4 + -9/5

We need a common denominator, which is 20

7/4 *5/5 + -9/5 *4/4

35/20 + -36/20

Add the numerators together

-1/20

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If a card is picked at random from a standard 52-card deck, what is the probability of getting a spade or a 8

g100num [7]

Answer:

1/4, 25%, or 0.25

Step-by-step explanation:

Therefore, as each suit contains 13 cards, and the deck is split up into 4 suits, that leaves us with a 13/52 chance to pick a spade.

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3 years ago

ou watch a roulette wheel spin 3 consecutive times and each time the ball lands in a red slot. What is the | probability that th

spayn [35]

Answer:

The probability is $\frac{18}{38}=0.4736$

Step-by-step explanation:

The game of roulette wheel consists in spinning a wheel with 38 slots : 18 red, 18 black and 2 green.

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In our exercise, we spin the roulette wheel 3 consecutive times and each time the ball lands in a red slot. This doesn't give us information about the fourth spin (because of the independence).

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2 years ago

Estimate the difference 8 7/12 - 4 7/8 - 4/10

Gnesinka [82]

When you are told to estimate, you should be able to do the problem in your head.
8 7/12 is close to 8 1/2
4 7/8 is very nearly 5
4/10 is very nearly 1/2

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8 1/2 - 1/2 = 8
Now take away the 5

8 - 5 = 3

So the answer is very nearly
3 <<<<< answer.

Just for fun, I'll get the exact answer. Don't hand this one in. It is 3 37/120
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3 years ago

Find tfind the distance between each pair of points (4,6 ) (-1, 8)

8090 [49]

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a2+b2=c2

9^2+12^2=c^2

81+144=c^2

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3 years ago

Read 2 more answers

Find all the missing elements. A=109 C=13 b=6 B=? a=? c=?

sasho [114]

Answer:

B = 58°
a = 6.6896
c = 1.5915

Step-by-step explanation:

Given two angles and the side between them, the first step must be to find the value of the third angle, the one opposite the given side. It will be ...

B = 180° -A -C = 180° -109° -13° = 58°

Using this information and the Law of Sines, you can find the remaining sides.

a/sin(A) = b/sin(B) = c/sin(C)

Then the missing sides are ...

a = b(sin(A)/sin(B)) = 6(sin(109°)/sin(58°)) ≈ 6.6896

c = b(sin(C)/sin(B)) = 6(sin(13°)/sin(58°)) ≈ 1.5915

The missing measures are ...

B = 58°

a = 6.6896

c = 1.5915

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3 years ago