How do you solve 4b^2+8b+7=4 using the quadratic formula

Answers

Answer 1
Answer: 4b^2+8b+7=4\n4b^2+8b+3=0\n\nx=(-b\pm√(b^2-4ac))/(2a)\n\nx=(-8\pm√(8^2-4\cdot4\cdot3))/(2\cdot4)\nx=(-8\pm√(64-48))/(8)\nx=(-8\pm√(16))/(8)\nx=(-8\pm4)/(8)\nx=(-2\pm1)/(2)\nx=(-1)/(2 )\vee x=(-3)/(2)\nx=-(1)/(2 )\vee x=-(3)/(2)
Answer 2
Answer: b= { (-8) ±    Sqrt(8^2)-4(4x(3)  )  } / 2(4)
b={ (-8±)  (Sqrt(16) )  } / 8
b=(-8+4)/8 and b=(-8-4)/8
b= -4/8    and b=-12/8
b=-1/2  and b=-3/2
b={-1/2, -3/2} is the solution.
Click image for formula.
Sqrt means Square Root.


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17.16 is 62.4% of what

Answers

17.16 is 62.4% of 27.5

Change the percentage (62.4) into a decimal by dividing the percentage by 100:
(62.4)/(100) = 0.624

Divide 17.16 by 0.624:
(17.16)/(0.624) = 27.5
Use is over of equals percent over 100. 17.6 would go where is is, and the percent would go in the place of the percent. Crossmultiply and you should get an answer. If you need me to check message me

What is 5+5? Answer for 20pints!

Answers

5+5 equals 10..........
Well, when you do 5 plus 5, you can use your hands because you have 5 on each finger, so 5 + 5 = 10
Hope this helped! 

Help pls
slope from graph

Answers

the slope in this graph is 1 :)
The slope in the graph is 1

You tell your parents that you will pay 15% tip for dinner. the bill was $162.39 You have $25

Answers

you need to pay $24.

eric has been donating books he no longer needs to his local library. after 3 months of donating, he had 157 books left in his room. after 8 months of donating, he had 102 books left in his room. how many books per month did eric donate on average between monhs 3 and 8?

Answers

157 - 102 = 55
-----------------------
8-3 = 5

55/5 = 11 books
he donated 18 books per month. you first finds the difference of the books then do use the number of books by the number of months (in this case it was 5 months)

The Red Line Below is Parallel To which of the following?A. The x-axis
B. The origin
C. the y-axis
D. None of those

Answers

Answer:

C.  y axis

Step-by-step explanation:

y axis is the answer

The red line is parallel to the middle line which is the x -axis
Answer =A