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aalyn [17]
3 years ago
10

For what value of b will f(x)= x^2 + bx + 900 have -30 as its only zero? PLEASE HELP!!

Mathematics
1 answer:
kiruha [24]3 years ago
7 0

Answer:

60

Step-by-step explanation:

If -30 is its only zero, than the factors are (x+30)(x+30) = x^2 + 60x + 900

Than b = 60

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Please help ASAP!ill give brainliest !
Vinil7 [7]
The vertex is at (0, 3) so y=a(x-0)²+3, which is y=ax²+3
next, use a given point to find a: 10=a(3)²+3, so 9a=7, a=7/9
the equation is then y=\frac{7}{9}x^2+3

as for the first question, the shape is an ellipse, the domain is -5≤x≤5, the range is -3≤y≤3 

the equation can be written as :\frac{x^2}{25}+ \frac{y^2}{9} =1
5 0
3 years ago
Adrian is a songwriter who collects royalties on his songs whenever they are played in a commercial or movie. Adrian will earn $
djverab [1.8K]

Answer:

commercial =  9

movie = 5

Step-by-step explanation:

Step one:

let the number of commercials be x and movies be y

so

40x+130y=1010-------------1

since there are a total of 14 commercials and movies combined

x+y=14--------------2

Hence the systems of equation is

40x+130y=1010------1

x+y=14-------------------2

Step two:

from equation 2

x=14-y

substui]te the value of x in  equation 1

40(14-y)+130y=1010

560-40y+130y=1010

collect like terms

130y-40y=1010-560

90y=450

divide both sides by 90

y=450/90

y=5

movies is 90

put y=5 in equation 2

x+5=14

x=14-5

x= 9

commercial is 9 in numbers

and movie is 5

7 0
2 years ago
How many apples can you buy for 60 cents at the rate of 3 for 10 cents
slava [35]
Answer:180 ...............
8 0
3 years ago
Read 2 more answers
PLZ HELP I REALLY NEED IT
Paladinen [302]

Answer:

Angle = 64 Degrees

Supplement of Angle = 116 Degrees

Step-by-step explanation:

Let the angle be "x"

We know

The complement of the angle is "90 - x"

and

The supplement of the angle is "180 - x"

From the statement given, we can write:

supplement is 12 LESS THAN twice the angle

The equation would be:

180 - x = 2x - 12

Now, we solve this for x:

180 - x = 2x - 12\\180+12=2x+x\\192=3x\\x-\frac{192}{3}\\x=64

The angle is 64 degrees

The supplement of the angle is 180 - 64 = 116 degrees

6 0
3 years ago
An artist wants to make a particular teal color paint by mixing a 75% blue hue and 25% yellow hue. He mixes a blue hue that has
Trava [24]
Answer:
Let p represent the teal color paint.
(0.75 × 0. 85p) + (0. 25 × 0.6p) = 0.7875p 78.75% of pure pigment is in the resulting teal color paint.
4 0
3 years ago
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