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Shalnov [3]
3 years ago
10

Gil is reading a book that has 276 pages.he already read some of it last week. He plans to read 20 pages tomorrow. By then he wi

ll be 2/3 of the way through the book. How many pages did Gil read last week?
Mathematics
1 answer:
Naya [18.7K]3 years ago
7 0
Last week Gill read 164 of the 276 pages of the book.
                                                                   hope this helped :)








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I really need help with this
zysi [14]

Answer:

Our system of equations is:

  • y+2x+1=0
  • 4y-4x²-12x = -7

We are looking for x

Let's express y using x

  • y+2x+1=0
  • y= -2x-1

Replace x in the second equation with the result

  • 4y-4x²-12x = -7
  • 4(-2x-1)-4x²-12x = -7
  • -8x-4-4x²-12x = -7
  • -8x-4x²-12x = -7+4
  • -4x²-20x = -3
  • -4x²-20x+3 = 0          multiply by -1 to get rid of the - signs with x
  • 4x²+20x-3=0

4x²+20x+3=0 is a quadratic equation

Let Δ be our discriminant

  • a= 4
  • b= 20
  • c= -3

Δ= 20²-4*4*(-3)

Δ=448 > 0 so we have two solutions for x

let x and x' be the solutions

  • x = \frac{-20-\sqrt{448} }{8}= -5.145 ≈ -5.15
  • x'= \frac{-20+\sqrt{448} }{8}= 0.145≈ 0.15

so the solutions are:

-5.15 and 0.15

7 0
3 years ago
Heather finished a race in 58.4 seconds, which was 2.6 seconds less than her practice time. Write and solve an equation to find
Natalija [7]
T means her practice time T=58.4-2.6
T=55.8.
5 0
3 years ago
A pastry chef wants to bake and sells fries. Before they start production, they need to make sure they can make a profit with th
vivado [14]

Answer:

They need to sell 9400 pies to reach the break-order point

Step-by-step explanation:

* Lets explain the break-order point

- The break-order point is the point at which total cost and total

  revenue are equal

∴ The total cost = The total revenue

* Lets solve the problem

∵ The equation of the total cost is y = 0.65x + 1410

∵ The revenue equation is y = 0.8x

- To find the break-order point equate the two equations

∴ 0.65x + 1410 = 0.8x

- Subtract 0.65x from both sides

∴ 1410 = 0.8x - 0.65x

∴ 0.15x = 1410

- Divide both sides by 0.15

∴ x = 1410/0.15 = 9400

∵ x is the number of pies

* They need to sell 9400 pies to reach the break-order point

3 0
3 years ago
What is the area of a triangle whose vertices are J(−2, 1) , K(4, 3) , and L(−2, −5) ?
MArishka [77]
Hello,


J (-2,1), K (4,3), and L (-2,-5) 
<span>Area of triangle: 18.00
</span>

REMEMBER: <span>Notice that one side is vertical. Use that side as base. 
</span>

Once again, Your answer is 18.


Hope this helps
8 0
3 years ago
Read 2 more answers
If I got a 35% out of 20 questions and Im going to get half credit in the 13 problems I got wrong what is going to be my percent
dsp73

Answer:

Step-by-step explanation:

So since each question is 5% (100/20=5)

we can do ((13*5)/2) because of half credit we divide by two

now we get 32.5% back

32.5%+35%=67.5%

unless of course of extra points on other assignments, the highest grade you can get in that class (if every other thing is a 100%) is an 87 if im not mistaken.

7 0
3 years ago
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