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Lostsunrise [7]
2 years ago
14

Each day, enough paperis recycledin the united statesto fill 15 miles of train boxcars.how many miles of boxcars could be filled

in 5 weeks?complete the equation to help you solve the problem
Mathematics
1 answer:
topjm [15]2 years ago
3 0
15 x 7 days = 105 then multiply 5 weeks. 5 x 105 = 525 miles
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Three numbers multiplied together give an answer of -12. The sum of two of the numbers is zero. What could the three numbers be?
Angelina_Jolie [31]
-2,2,3 since 2*-2*4 = 12 and -2+2=0
3 0
2 years ago
HELP ASAP PLSSSSSSSSSSSS
ludmilkaskok [199]

Answer:

f = .39

Step-by-step explanation:

d (v) = 2.15 v^2 / (64.4 f)

v = 40

d = 138

substitute these in

138 = 2.15 (40)^2 / (64.4 *f)

simplify

138 = 2.15 (*1600) / (64.4 *f)

138 = 3440 / (64.4 *f)

multiply each side by 64.4f

138 * 64.4 f = 3440

8887.2 f = 3440

divide by 8887.2

8887.2 f /8887.2= 3440/8887.2

f=.38707

to the nearest hundredth

f = .39

8 0
3 years ago
Read 2 more answers
Help pls. Due 10/4/18
luda_lava [24]
Write down

15-80

Solve it by adding 15 to -80

The final answer is -65
7 0
2 years ago
Read 2 more answers
Which of the following are solutions to 2x2 – 8x - 90? Select all that apply.
Bond [772]

Answer:

x=-5, x=9

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

2x^{2} -8x-90  

equate to zero

2x^{2} -8x-90=0  

so

2=-1\\b=-8\\c=-90

substitute in the formula

x=\frac{-(-8)\pm\sqrt{-8^{2}-4(2)(-90)}} {2(2)}

x=\frac{8\pm\sqrt{784}} {4}

x=\frac{8\pm28} {4}

x=\frac{8+28} {4}=9

x=\frac{8-28} {4}=-5

therefore

The solutions are x=-5, x=9

6 0
2 years ago
Helium decays to form lithium. 6 2 he → 6 3 li 0 -1 e this type of nuclear decay is called .
PSYCHO15rus [73]

To understand this question, we need some knowledge on radioactive decay. This type of nuclear decay is called a beta decay

<h3>Beta Decay</h3>

This is the process where a radioactive material is fired or naturally emits a beta particle which is equivalent to the lose of an electron and spontaneously becomes an entirely different element.

^6_2He \to ^6_3 Li + ^0_-_1e

The participating actors in this nuclear reaction are

  • helium
  • lithium
  • electron

This is the decay process of helium particle in which it became a lithium particle and emitted an electron in the process.

Learn more on beta decay here;

brainly.com/question/9615302

#SPJ4

8 0
2 years ago
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