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Hitman42 [59]
3 years ago
6

Hi.I need help with math.Please help.Best gets brainiest.

Mathematics
2 answers:
bonufazy [111]3 years ago
7 0
Zero product says that if you have
x=0, then the non-zero factors equal zero

so
try to move all to one side to get it to equal zero and factor

4y^3-4=y-16y^2
add 16y^2 to both sides
4y^3+16y^2-4=y
subtract y
4y^3+16y^2-y-4=0
gropu and factor
(4y^3+16y^2)+(-y-4)=0
(4y^2)(y+4)+(-1)(y+4)=0
reverse distribute
ba+ca=a(b+c)
(4y^2-1)(y+4)=0
set each to zero

4y^2-1=0
add 1
4y^2=1
divide by 4
y^2=1/4
square root both sides
y=+/-1/2

y+4=0
minus 4
y=-4



y=-4,-1/2,1/2


answer is A -4,-1/2,1/2
dimulka [17.4K]3 years ago
5 0
4y^3-4 =y-16y^2

Subtract y -16y^2 from both sides

4y^3 -4-(y-16y^2) = y -16y^2-(y-16y^2)

4y^3-4-y+16y^2=0

Solving by factoring:

Factor 4y^3-4-y + 16 y^2

(4y^3+16y^2) + (-y-4)

Factor out 4 y^2 from 4y^3+16y^2 : 4y^2(y+4)

Factor out -1 from -y-4 : -y(y+4) = 4y^2(y+4)-(y+4)

Factor out common term (y+4)

=(y+4)(4y^2-1)

Factor 4y^2-1 = ( 2y+1)(2y-1)

= (y+4)(2y+1)(2y-1) = 0

Using the zero factor principle:

Solve y+4 = 0  : y = -4

Solve 2y+1 = 0 : y = - \frac{1}{2}

Solve 2y-1 = 0 : y =  \frac{1}{2}


The final solutions to the equation are :

y = - 4

y =  -\frac{1}{2}

y =  \frac{1}{2}

Answer A

hope this helps! =)
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Answer:

it's being divided by -5

Step-by-step explanation:

-5m= -40

m=8

8 0
3 years ago
9). Four friends earned $4.20 for washing a car. They decided to split the money equally. How much money did each friend get?​
V125BC [204]

Answer:

1.05

Step-by-step explanation:

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3 years ago
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In one year the perseid metor shower had a metor appear every 1/5 5 minutes on average That same year the Leonid metor shower ha
olga55 [171]

In one year, the Perseid meteor shower had a meteor appear every 1 1/5 minutes on average. That same year, the Leonid meteor shower had a meteor appear every 4 2/3 minutes on average. How many more meteors fell during the Perseid meteor shower?

Answer:

325,452 meteors

Step-by-step explanation:

We all know that :

We have 365 days in a year and in each day there are 24 hours, Likewise an hour has 60 minutes

SO, the total number of minutes in a year is :

365 × 24 × 60 = 525600 minutes

For Perseid  meteor:

1 + \frac{1}{5}  \\ \\ = 1 + 0.2 \\  \\ = 1.2

So one meteor fall at 1.2 minutes interval Thus, in a year, we will have :

1 meteor - 1.2 minutes.

x meteor - 525600 minutes.

1.2x = 525600

x = \frac{525600}{1.2}

x = 438000

∴  438,000 meteors fell during the Perseid shower.

For  Leonid meteor shower:

4 + \frac{2}{3} = 4.67

So one meteor fall at 4.67 minutes interval Thus, in a year, we will have :

1 meteor - 4.67 minutes.

x meteors - 525600 minutes.

4.67x = 525600

x = \frac{525600}{4.67}

x = 112548

112,548 meteors fell during the Leonid Shower.

Finally , the numbers of more meteors that  fell during the Perseid meteor shower is calculated by the difference in the number of Perseid meteor shower and Lenoid meteor shower. i.e

438,000 - 112,548 = 325,452

325,452 more meteors fell during the Perseid meteor shower

5 0
3 years ago
a force of 50 pounds stretches a spring 4 inches. how much force is required to stretch the spring 10 inches?
-BARSIC- [3]

Answer:

125 pounds

50/4 = 12.5 pounds stretches a spring to 1 inch

12.5x10=125 pounds of force

3 0
2 years ago
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