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2 years ago

22. Tebogo is driving to his mother's house the drives at 50kruh, it takes him

Mathematics

1 answer:

KIM [24]2 years ago

8 0

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Step-by-step explanation:

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Use complete the square to solve 5x²-7x-3=0

Yuki888 [10]

Step-by-step explanation:

ax2 + bx + c = 0

x12 = (-b ± √D) / 2a , D = b2 - 4ac .

5x2 + 7x + 3 = 0

a = 5 , b = 7 , c = 3

D = 49 - 60 = - 11 , x1 = (-7 - i √11) / 10

x2 = (-7 + i √11) / 10

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2 years ago

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Which equation is not a linear function? y = x2 y = x + 2 y = 2x y = x - 2

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Y= x2 is not linear it is a parabola. There is you me answer hope it helps

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3 years ago

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Do these two have the correct answers?

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Since Death Valley is below sea level, the hiker increases altitude before stopping at 0 feet.

Percent of increase is given by the formula (amount of change)/(original amount) * 100. Your work is accurate.

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3 years ago

Which expression is equivalent to -35 3/5

Alex787 [66]

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3 years ago

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a. Among a shipment of 5,000 tires, 1,000 are slightly blemished. If one purchases 10 of these tires, what is the probability th

hodyreva [135]

Answer:

<h2>See the explanation.</h2>

Step-by-step explanation:

3 or less than 3 tires among the 10 tires should be blemished.

There are some possibilities.

1000 tires are blemished, (5000 - 1000) = 4000 tires are not blemished.

From the 5000 tires, 10 tires can be chosen in $^{5000}C_{10}$ ways.

Possibility 1: 3 tires are blemished.

Total 10 tires can be chosen with 3 blemished tires in $^{1000}C_3 \times {4000}C_7$ ways.

Possibility 2: 2 tires are blemished.

Total 10 tires can be chosen with 2 blemished tires in $^{1000}C_2 \times ^{4000}C_8$ ways.

Possibility 3: 1 tires are blemished.

Total 10 tires can be chosen with 1 blemished tires in $^{1000}C_1 \times^{4000}C_9$ ways.

Possibility 4: No tires are blemished.

Total 10 tires can be chosen with no blemished tires in $^{1000}C_0 \times^{4000}C_{10}$ ways.

Hence, the required probability is $\frac{^{1000}C_1 \times^{4000}C_9 + ^{1000}C_0 \times^{4000}C_{10} + ^{1000}C_2 \times^{4000}C_8 + ^{1000}C_3 \times^{4000}C_7}{^{5000}C_{10} }$ .

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2 years ago