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murzikaleks [220]
3 years ago
13

The function f(x) = -x2 + 40x - 336 models the daily profit, in dollars, a shop makes for selling donut

Mathematics
1 answer:
Olenka [21]3 years ago
5 0

Answer:

This question should be worth atleast 20 points

Step-by-step explanation:

a. For the vertex, input the funtion into the calculator, and see where the turning piont is, that is the vertex.

b. Solve using this vormula.

x= (-b ±\sqrt{b^2 - 4ac})/2a

you will get two asnwrs, both are correct.

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3 years ago
Simplity 5x 2x + 7 ​
babymother [125]

Answer:

7x + 7

Step-by-step explanation:

7x + 7

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7x + 7

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3 years ago
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In △PKQ, PK = KQ = 12, m∠P = 35º. Find PQ.
Neporo4naja [7]

The length of PQ is 19.66 units

Step-by-step explanation:

The given is:

1. PK = KQ = 12

2. m∠P = 35º

We need to find the length pf PQ

∵ PK = KQ

∴ m∠P = m∠Q

∵ m∠P = 35°

∴ m∠Q = 35°

The sum of measures of the angles of a triangle is 180°

∴ m∠P + m∠Q + m∠K = 180°

∴ 35 + 35 + m∠K = 180

∴ 70 + m∠K = 180

- Subtract 70 from both sides

∴ m∠K = 110°

Let us use cosine rule to find the length of PQ

∵ PQ = \sqrt{(KP)^{2}+(KQ)^{2}-2(KP)(KQ)cos(K)}

∵ PK = 12 , KQ = 12 , m∠K = 110°

- Substitute these values in the rule

∴ PQ = \sqrt{(12)^{2}+(12)^{2}-2(12)(12)cos(110)}

∴ PQ = 19.66

The length of PQ is 19.66 units

Learn more:

You can learn more about triangle in brainly.com/question/12985572

#LearnwithBrainly

4 0
3 years ago
URGENT I NEED HELPPPPP
lorasvet [3.4K]

Answer:

8/15

Step-by-step explanation:

Using Pythagorean Theorem the length of XZ is 15.

tan X = opposite / adjacent = YZ / XZ = 8 / 15.

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Solve for b. Help! Explain steps!
Doss [256]

Answer:

what is the unit and class

Step-by-step explanation:

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