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charle [14.2K]
3 years ago
9

A jar contains 10 red marbles and 20 blue marbles. if one red marble is selected and then placed back into the jar, what is the

probability of the next marble being a blue marble?
Mathematics
1 answer:
Serggg [28]3 years ago
6 0
You have a 30% chance of getting a blue marble. <span />
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ABCD is a parallelogram. Segment AC = 4x + 10. Find the value of x and y.
valkas [14]

Answer:

The values of x and y in the diagonals of the parallelogram are x=0 and y=5

Step-by-step explanation:

Given that ABCD is a parallelogram

And segment AC=4x+10

From the figure we have the diagonals AC=3x+y and BD=2x+y

By the property of parallelogram the diagonals are congruent

∴ we can equate the diagonals AC=BD

That is 3x+y=2x+y

3x+y-(2x+y)=2x+y-(2x+y)

3x+y-2x-y=2x+y-2x-y

x+0=0 ( by adding the like terms )

∴ x=0

Given that segment AC=4x+10

Substitute x=0  we have AC=4(0)+10

=0+10

=10

∴ AC=10

Now (3x+y)+(2x+y)=10

5x+2y=10

Substitute x=0, 5(0)+2y=10

2y=10

y=\frac{10}{2}

∴ y=5

∴ the values of x and y are x=0 and y=5

5 0
3 years ago
Why isnt 40 divisable by 7 ?
stealth61 [152]

Actually, 40 is divisible by 7. Any number is divisible by 7. However, 7 does not go into forty evenly. Your quotient would have a remainder since 7 cannot go into 40 an even number of times.

7 goes into 40 5 times evenly (7x5=35) 40-35 is five, so 40 divided by 7 is 5  (remainder 5)

~theLocoCoco

6 0
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Number 11 plz also show your work
Serjik [45]

Answer:3.25 gallons

Step-by-step explanation:48 miles÷2 gallons =24 miles

Every 24 miles equals 1 gallon

So 78 ÷ 24= 3.25

3.25 gallons

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Which number sentence is NOT an inequality?
Georgia [21]

Answer:

Option B, 1/4 (x - 5) = 13

Step-by-step explanation:

An inequality has a less than, greater than, less than or equal to, and greater than or equal to.  <u>But, there are no equal signs allowed in a inequality.  That makes it an expression.</u>

Answer:  Option B, 1/4 (x - 5) = 13

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miss Akunina [59]

Answer:

no

Step-by-step explanation:

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