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sergey [27]
3 years ago
6

Can someone please help me!?

Mathematics
2 answers:
umka21 [38]3 years ago
8 0
Since you're not returning the marble, there is one less to choose from in the second draw.

First draw: 5/10 (five out of 10 are red)
Second draw: 4/9 (four out of 9).

First AND second draw: 5/10*4/9 = 20/90 = 2/9, answer B.

Second question: the only possibility is to pick a red tulip, so that's a certainty! Answer A.
g100num [7]3 years ago
4 0
I'm not so sure about the first one but I think it's B
and for the second it would be certain because all of the tulips are red.
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the average price of a gallon of gas was $3.22 and 2014 and $2.40 in 2015 what is the percent decrease in the price of gas​
kakasveta [241]

Answer:

25.47%

Step-by-step explanation:

6 0
3 years ago
Two mechanics worked on a car. The first mechanic charged $55 per hour, and the second mechanic charged $60 per hour. The mechan
Nady [450]

Answer:

15 and 5 hours.

Step-by-step explanation:

Call x the time taken by the first chap, and y the second.

\left \{ {{x+y = 20 \atop {55x+60y=1125}} \right.

Let's divide by 5 and play with the LHS of the first equation a bit:

11x+ 11y +y = 225\\11(x+y)+y= 225 we know how much x+y is ( first equation!) let's solve.

11(20) +y = 225 \rightarrow y=5 At this point it's easy to check that x=15

8 0
3 years ago
Two trains leave the station at the same time, one heading west and the other east. the westbound train travels at 80 miles per
Volgvan
80+70=150
270/150=1.8 hours before the two trains are 270 miles apart
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4 0
3 years ago
3x+1 = 27<br> answer choices: a) -1/3<br> b) -6<br> C) -2/3<br> d) -3/2
DochEvi [55]
None of those are correct. x= 8 and 2/3
8 0
3 years ago
URGENT PLEASE ANSWER!
zheka24 [161]

Answer:

<h2>YES</h2><h2>NO</h2><h2>YES</h2><h2>NO</h2>

Step-by-step explanation:

3x+7\\\\3\left(x+\dfrac{7}{3}\right)=(3)(x)+(\not3)\left(\dfrac{7}{\not3}\right)=3x+7\qquad\boxed{YES}\\_{\text{used the distributive property: a(b + c) = ab + ac}}\\\\x+x+x+5+1=(x+x+x)+(5+1)=3x+6\neq3x+7\qquad\boxed{NO}\\\\8x+3-5x+4=(8x-5x)+(3+4)=3x+7\qquad\boxed{YES}\\\\7x+3\neq3x+7\qquad\boxed{NO}

6 0
3 years ago
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