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oksian1 [2.3K]
3 years ago
12

Evaluate the function. f(x) = -x2 + 5x + 15 Find f(9)

Mathematics
2 answers:
ss7ja [257]3 years ago
6 0
When evaluating this problem F(9) = 42
Keith_Richards [23]3 years ago
5 0

Answer:

f(9) = 42

Step-by-step explanation:

f(9) = (-9)*2 + 5*9 +15

= -18 + 45 + 15

= 42

You might be interested in
a sports tournament has three teams each team has the same number of players there are 21 players total how many players does ea
Natalka [10]

Answer:

7

Step-by-step explanation:

3 team and 21 players

21÷ 3= 7

3 0
3 years ago
What is the value of x? assume that the line is tangent to the circle
nekit [7.7K]

Answer:

70°

Step-by-step explanation:

Connect the center of the circle with endpoints of the chord. Let the center of the circle be point O and endpoints of the chord be points A (let point A lie on the tangent line too)and B.

From the figure, central angle AOB has the measure of 220°.

Consider triangle AOB. This triangle is isosceles triangle because OA and OB are both radii. In this triangle the measure of angle AOB is 360° - 220° = 140°.

Angles OAB and OBA are angles adjacent to the base AB, so they are congruent. The sum of the measures of all interior angles in triangle is always 180°, so

m∠OAB + m∠OBA + m∠AOB = 180°

m∠OAB = m∠OBA = 1/2 (180° - 140°)

m∠OAB = 20°

Since drawn line is tangent line, then OA is perpendicular to this tangent line and

x° = 90° - 20°

x° = 70°

4 0
3 years ago
75% of what equals 225?<br> What did you get for 10%, 20% , 30% , 40%, 50% ,60% and 70%?
Lesechka [4]
75% of 225 = 300.

10% = 30
20% = 60
30% = 90
40% = 120
50% = 150
60% = 180
70% = 210
80% = 240
90% = 270
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If you need an explanation, just ask.
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8 0
3 years ago
A rectangular flower bed covers an area of 11.76 square feet in the garden. The width of the flower bed is 3.5 feet less than it
Degger [83]
The length and width of the garden will be obtain as follows:
let the length be x ft, the width will be (x+3.5)ft
area of the bed will be:
A=length*width
11.76=x(x+3.5)
11.76=x^2+3.5x
thus
x^2+3.5x-11.76=0
solving this by quadratic formula we get:
x=[-b+/-sqrt(b^2-4ac)]/2a
thus plugging in the values we obtain
x=[-3.5+/-sqrt(3.5^2-4(-11.76*1))]/2
x=[-3.5+/-sqrt59.29]/2
x=[-3.5+/-7.7]/2
x=4.2 or -11.2
thus the length will be x=4.2 ft and the width will be x-3.5=0.7 ft
8 0
3 years ago
Yub87654d HELP there is this person trying to kid,.,nap,./, kids so if you see an account called Hernyana report there questions
eduard

Answer:

Okay

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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