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3 years ago

14

Maria can weed the garden in 1.5 hours. If Janette helps her, they can finish the job in 30 minutes. How long does it take Janet

te to weed the garden alone?

1 answer:

gogolik [260]3 years ago

6 0

1 hour. 1.5-30=1 hour

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Given: ΔSTQ, ST = TQ ST ⊥ TQ m∠1=32º. Find: m∠S, m∠T, m∠Q

Darina [25.2K]

M∠S = 45°; m∠T = 90°; m∠Q = 45°

Explanation
Since ST⊥TQ, this means that m∠T = 90°.

This means that m∠S+m∠Q = 180-90 = 90°.

Since ST = TQ, this means that the other two angles, formed by the legs and the hypotenuse, must be congruent. 90/2 = 45° for each angle.

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3 years ago

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babunello [35]

Answer:

$P(X=3)$

And using the probability mass function we got:

$P(X=3)= (12C3)(\frac{1}{6})^3 (1-\frac{1}{6})^{12-3}=0.1974$

Step-by-step explanation:

Let X the random variable of interest "number of times that 6 appears", on this case we now that:

$X \sim Binom(n=12, p=1/6)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And we want to find this probability:

$P(X=3)$

And using the probability mass function we got:

$P(X=3)= (12C3)(\frac{1}{6})^3 (1-\frac{1}{6})^{12-3}=0.1974$

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3 years ago

100 points + brainiest

Scrat [10]

Answer:

35 grams of 11.43% solution

Step-by-step explanation:

The end solution has same volume as initial volumes of mixture.

10 + 25 = 35 g

The concentration of solution is calculated as below

10*0.15 + 25*0.1 = 4 g
4 / 35*100% = 11.43% (rounded)

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3 years ago

How can we get the answer for...Decrease £8 by 20%

antiseptic1488 [7]

Multiply by 0.8. do 8×.8

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4 years ago

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What is the product?<br> 2 4 - 12<br> y-3 2y+6

daser333 [38]

Answer:

-44y+30

Step-by-step explanation:

24 - 12y - 32y + 6

Add similar elements: -12y - 32y= -44y

= 24 - 44y + 6

Group like terms.

= -44y +24 + 6

Add the numbers: 24 + 6 = 30

= -44y + 30

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4 years ago