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Nikitich [7]
3 years ago
9

Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.

Mathematics
2 answers:
Vsevolod [243]3 years ago
8 0

Answer:

after 1 minute they will both have 9

Step-by-step explanation

1 minute  

5             9

+      

4

_________________

9                   9        

9 flashcards is how many each student will have to make.

It will take 1 minute

Korolek [52]3 years ago
3 0
Chloe and Fiane will each have 9 flash cards in 1 minute.
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Dave wants to buy a bike for $180. He has $40. Dave mows lawns for $10 per lawn.
LenaWriter [7]

Answer:

180 = 40 + 10x

Step-by-step explanation:

5 0
2 years ago
Each morning, Hungry Harry eats some eggs. On any given morning, the number of eggs he eats is equally likely to be 1, 2, 3, 4,
mamaluj [8]

Answer:

Mean = 35

Variance = 291.7

Step-by-step explanation:

Data provided in the question:

X : 1, 2, 3, 4, 5, 6

All the data are independent

Thus,

The mean for this case will be given as:

Mean, E[X] = \frac{\textup{Sum of all the observations}}{\textup{Total number of observations}}

or

 E[X] = \frac{\textup{1+2+3+4+5+6}}{\textup{6}}

or

E[X] = 3.5

For 10 days, Mean = 3.5 × 10 = 35

And,

variance = E[X²] - ( E[X] )²

Now, for this case of independent value,

E[X²] = \frac{1^2+2^2+3^2+4^2+5^2+6^2}{\textup{6}}

or

E[X²] = \frac{1+4+9+16+25+36}{\textup{6}}

or

E[X²] = \frac{91}{\textup{6}}

or

E[X²] = 15.167

Therefore,

variance = E[X²] - ( E[X] )²

or

variance = 15.167 - 3.5²

or

Variance = 2.917

For 10 days = Variance × Days²

= 2.917 × 10²

= 291.7

3 0
3 years ago
Luis works 45 hours and earns 10 an hour. How much money would he earn in 3 weeks.
daser333 [38]

Answer: $1,350

Step-by-step explanation:

45 hours x 10 dollars/hour = 45x10 dollars = 450 dollars/week

450 dollars/week x 3 weeks = 450x3 dollars = 1350 dollars

3 0
3 years ago
A right triangle has one 64degree angle and one 90 degree angle
melamori03 [73]

Answer:

I dont know what your asking, for the other angle? Ig so. Answer: THE OTHER ANGLE IS 26. :)

Step-by-step explanation:

64 + 90 = 154.

All triangles add up to 180 degrees.

180-154 = 26.

7 0
3 years ago
I need help plsssssss​
Svetllana [295]

4)Area :32cm

5)18cm

6) 49cm

4 0
3 years ago
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