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sasho [114]
3 years ago
12

Keith bought 6 new baseball trading cards to add to his collection. The next

Mathematics
1 answer:
sergeinik [125]3 years ago
4 0

Keith started with 44 cards.

So we need to work backwards.

After his dog ate half his collection, he had 25 cards.

To reverse that, you need to multiply 25 by 2.

25×2=50

If he bought 6 new cards that day, then he started with 6 cards less.

So you have to subtract 6 from 50.

50-6=44

♡ Hope this helped! ♡

❀ 0ranges ❀

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Two airplanes are are 1600 miles apart and heading toward each other at different altitudes. The first plane is traveling north
Elden [556K]

The planes will pass each other in 1.14 hours.

Why?

To solve the problem, we must remember that since both planes are heading toward each other, the speed to the calculations will be their combined speeds.

The speed will be:

Speed=PlaneA+PlaneB\\\\Speed=620mph+780mph=1400mph

Now, calculating the time, we have:

x=v*t\\\\1600mi=1400mph*t\\\\t=\frac{1600mi}{1400mph}=1.14hours

Hence, the planes will pass each other in 1.14 hours.

Have a nice day!

6 0
3 years ago
A person eating at a cafeteria must choose 4 of the 13 vegetables on offer. calculate the number of elements in the sample space
Serggg [28]

A person eating at a cafeteria must choose 4 of the 13 vegetables on offer. calculate the number of elements in the sample space for this experiment.

Answer: The number of elements in the sample space for this experiment can be found using the combination formula because the order does not matter here.

Therefore, the number of elements in the sample space for this experiment is:

13C4=\frac{13!}{(13-4)!4!}

              =\frac{13!}{9! \times 4!}

              =\frac{6227020800}{8709120}

              =715

Therefore, the number of elements in the sample space for this experiment is 715.

7 0
4 years ago
The legs of an isosceles triangle have lengths x + 1 and -x + 7 . The base has length 3x - 3. What is the length of the base?
kaheart [24]
Since this is an isosceles triangle, then the lengths of both legs are equal
Therefore,
x+1=-x+7
2x=6
x=3
Therefore, the length of the base is:
3x-3=3(3)-3=6
Then your answer is (A)
5 0
3 years ago
Read 2 more answers
Find the Area of the figure below, composed of a parallelogram and two semicircles.
Fed [463]

Two needed formulas,:

To find the area of a parallelogram, use

A = bh.

To find the area of a semicircle, use

Area = (πr^2)/2.

The area of the parallelogram is 11 x 32 or 352.

The two semicircle have the same measure.

The radius of the semicircle is (1/2)(16) or 8.

Area = (π8^2)/2

Area = 64π ÷ 2

A = 32π

There are two semicircle.

So, the area of both semicircle combined is

2(32π) or 64π.

Area of figure = 64π + 352.

Area of figure = 553.0619298304

We now round to the nearest tenths to get

Area of the figure = 553.06.

5 0
3 years ago
The perimeter of the square is 4(x + 3.3) meters. What is the value of x if the perimeter is 28 meters?
enyata [817]
4(x+3.3)=28
/4             /4
x+3.3=7
  -3.3  -3.3
x=3.7
8 0
3 years ago
Read 2 more answers
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