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ser-zykov [4K]
3 years ago
15

Which statement is true about this quadratic equation? y=x^(2)-11x+7

Mathematics
1 answer:
Sliva [168]3 years ago
6 0

Answer: <em>This quadratic equation has two real solutions.</em>

<em />

Step-by-step explanation:

y=x^{2} -11x+7\\\\D=(-11)^{2} -4 \cdot 7=121-28=93 \: > 0\\\\x=\dfrac{11 \pm \sqrt{93} }{2}

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Rewrite the function W= 50+2.3(h-60) in order to express height as a function of weight
OLga [1]
You need to solve the equation for h.

<span>W= 50+2.3(h-60)

Distribute the 2.3.

W = 50 + 2.3h - 138

W = 2.3h - 88

Add 88 to both sides.

W + 88 = 2.3h

Switch sides.

2.3h = W + 88

Divide both sides by 2.3.

h = (W + 88)/2.3
</span>
5 0
4 years ago
A fair coin is flipped four times . use a tree diagram to find the probability of observing. exactly two heads . enter youe answ
Leni [432]

Answer:

50%

Step-by-step explanation:

So, we divide by another 2! to cancel out double counting of two T's. Finally, if we divide all 6 different ways of getting exactly 2 heads (and 2 tails) in 4 flips by all possible outcomes 2 * 2 * 2 * 2 = 16 we would get the probability of exactly 2 heads in 4 flips.

5 0
3 years ago
in a walk for charity, you walk at a rate of 100 meters per minute. how long does it take to walk 2 kilometers?
Shalnov [3]
The rate that you are walking at is 100 meters per minute. In two kilometres there are 2000 meters. It takes 10 min to walk one kilometre. Therefore the answer is 20 minutes. Just divide 2000 by 100 to get the time
7 0
3 years ago
Read 2 more answers
Which value must be added to the expression x^2-3x to make it a perfect-square trinomial?
dalvyx [7]

Answer:

You must add 9/4 in order to make this a perfect square.

Step-by-step explanation:

To make any binomial into a perfect square trinomial, you have to take the middle term (-3), cut it in half (-3/2) and then square it (9/4). This will give you the constant to make a perfect square trinomial every time.

3 0
3 years ago
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What are the dimensions of the matrix?
salantis [7]

The order of a matrix is m×n where m is the number of rows and n is the number of columns.

can you count and find what are m and n here?

6 0
3 years ago
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