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OleMash [197]
3 years ago
15

Jack and his three siblings made a spinner to decide who has to do each chore. If there are three chores to do, what is the prob

ability that Jack will have to do at least one of them? A. 37/64 B. 175/256 C. 7/8 D. 7/16
Mathematics
2 answers:
Natali [406]3 years ago
7 0
The answer is C. 7/8
Minchanka [31]3 years ago
4 0

Answer:

7/8

Step-by-step explanation:

Because he has three brothers, and it also depends on how many times the spinner turns on each turn

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Waffles are made with 2 1/2 cups water and 1 1/2 cups milk. What is the ratio of water to milk?
WITCHER [35]

Answer:

5 : 3

Step-by-step explanation:

Water: 2.5 cups

Milk: 1.5 cups

Water/Milk: 2.5/1.5 = 5/2 / 3/2 = 5/2 * 2/3 = 5/3

Hope this helps :)

3 0
3 years ago
Démontrer que x²-4x+5=(x-2)²+1 ; En déduire que x²-4x+5=0 n'a pas de solution
iragen [17]
1st: toute valeur de x rend I'<span>équation vraie
tous les nombres r</span><span>éels

2nd: r</span><span>ésoudre l'équation pour x en trouvant a, b et c du quadratique puis en appliquant la formule quadratique
x = 2 ± i</span>
8 0
3 years ago
Please help asap! i just need the answers. brainliest to first CORRECT answer!! thanks!
kobusy [5.1K]

Answer:

a. 8,953.5 seconds

b. 14,400 seconds (check note)

Step-by-step explanation:

a.

y=-4x

y=-35814 (negative because this is underwater)

-35814=-4x

8953.5

The model suggests it would take 8,953.5 seconds for DeepSea Challenger to reach the bottom (2.487083333 hours, or about 2 hours and 30 minutes).

b.

y=4x

x=3600 (positive because the vessel is rising)

4(3600)

14400

It took 14,400 seconds for the DeepSea Challenger to ascend to the surface.

[also note: I'm not sure if the second question is asking for how many seconds it takes to ascend to the surface with reference to the 4 seconds in the previous question (which is how I answered part b) or if it's asking how many seconds 1 hour is, and in that case. the answer is 3,600 seconds. I hope this helps and sorry if it's unclear!]

4 0
3 years ago
Read 2 more answers
I need help with this proof, the given and prove are at the top. Plzzzz help
Goshia [24]

Answer:  The proof is mentioned below.

Step-by-step explanation:

Here, Given : m∠AOC = 160°  m∠AOD= (3x-10)° and  m∠ DOC= (x+14)°

Prove: x= 39°

      Statement                                              Reason

1. m∠AOC = 160°, m∠AOD= (3x-10)°    1.  Given

and m∠ DOC= (x+14)°    

2. m∠AOD+m∠DOC=m∠AOC         2. Because OD divides ∠AOC

                                                              into ∠AOD and ∠DOC

3. (3x-10)° +(x+14)°= 160°                     3. By substitution

4.  4x+4 = 160°                                    4. By equating like terms

5. 4x= 156°                                          5. By subtraction property

                                                             of equality

6. x= 39°                                              6. By division property of equality


7 0
3 years ago
Find the amount and and compound interest on 20000 compound annually for 3 years the Tate of interest being 5%,10%and12%respecti
Setler79 [48]

The formula is principal x ( 1+ interest rate)^ number of years

5%:

20,000 x 1.05^3 = $23152.50 total

Interest = 23152.50-20000= $3,152.50

10%

20000 x 1.10^3 = $26,620.00

Interest = 26620-20000 = $6,620

12%

20000 x 1.12^3 = $28,098.56

Interest = 28098.56-20000 = $8.098.56

4 0
3 years ago
Read 2 more answers
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