All categories

3 years ago

Im not good at this unit

Mathematics

2 answers:

Wittaler [7]3 years ago

7 0

Answer:

we need the actual problem

Step-by-step explanation:

please post a photo or just type out the question

postnew [5]3 years ago

5 0

Which unit, I’ll try to help but I need the problem

You might be interested in

Mary’s dog weights 81 pounds. Sandy’s dog’s weight is equal to 4 pounds less than 1/3 of marys dog’s weight. How much does Mary’

gtnhenbr [62]

Answer:

Mary 81

Sandy 30

Step-by-step explanation:

S-3=M/3

multiply by 3

3s-9=m

m=81

3s-9=81

add 9

3s=90

divide by 3

s=30

5 0

3 years ago

Triangle that has 60, 30, 90 triangle. Ab= 10, AC=5 what is BC

lesantik [10]

Answer: BC = √75 unit

Step-by-step explanation: AB = 10 unit AC = 5 unit

∴ BC = 10² - 5²

= 100 - 25 = 75

BC = √75 unit

7 0

3 years ago

I need help I need a better understanding

Klio2033 [76]

What is it you need help with?

8 0

3 years ago

A particular automatic sprinkler system has two different types of activation devices for each 3 sprinkler head. One type has a

zmey [24]

Answer:

There is an 85% probability that the sprinkler head will be activated.

Step-by-step explanation:

We have these following probabilities:

50% of the first sprinkler being triggered

90% of the first sprinkler being reliable

50% of the second sprinkler being triggered

80% of the second sprinkler being reliable.

What is the probability that the sprinkler head will be activated?

$P = P_{1} + P_{2}$

$P_{1}$ is the probability of the first sprinkler being triggered and activated. So:

$P_{1} = 0.5*0.9 = 0.45$

$P_{2}$ is the probability of the second sprinkler being triggered and activated. So:

$P_{2} = 0.5*0.8 = 0.40$

$P = P_{1} + P_{2} = 0.40 + 0.45 = 0.85$

There is an 85% probability that the sprinkler head will be activated.

6 0

3 years ago

Need help pls!!! Hurry

Olin [163]

Answer:

-1÷ 5 = -0.2

-0.2×4=-0.8 = -4/5

I hope that was helpful

7 0

3 years ago