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Olin [163]
3 years ago
9

lizzy is tiling a kitchen floor for the first time she had a tough time at first and placed only 5 tiles the first day she start

ed to go faster and by the end of day 4 she had placed 35 tiles she worked at a steady rate after the first day use an equation in point slope form to determine how many days lizzy took to place all of the 100 tiles needed to finish the floor
Mathematics
2 answers:
disa [49]3 years ago
8 0
She placed only 5 tiles the first day and started to go faster and by theend of day 4 she had placed 35 tiles.
So,
we have two points:
(1,5) and (4,35)
Slope = 30/3
          = 10
Y - 5 = m(X - 1)
For  100 tiles,
100 - 35 = 10 (X - 4)
65 =10(X - 4)
6.5 = X - 4
X = 10.5
So,11th day
leva [86]3 years ago
7 0
(x1, y1) = (1, 5)
(x2, y2) = (4, 35)

y - y1 = (y2 - y1)/(x2 - x1) (x - x1)
y - 5 = (35 - 5)/(4 - 1) (x - 1)
y - 5 = 10(x - 1)

100 - 5 = 10(x - 1)
95/10 = x - 1
x = 9.5 + 1 = 10.5
x = 10.5

Therefore, It will take her 10.5 days to place all 100 tiles.
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Paul [167]
You need to use percentage I would help but I can’t because of I’m bad at percentages
4 0
3 years ago
11 people enter a pie eating contest. how many ways can the prize be awarded to the top 3
True [87]
This is a permutation question because we care about the order.
We can demonstrate this by letting each person be a person in the pie eating contest.

A   B   C   D   E   F   G   H   I   J   K

_   _   _

Now, there are 11 ways for the first prize to be won, since there are no restrictions upheld. Let's say A wins the first prize.

B   C   D   E   F   G   H   I   J   K

A   _   _

Now, assuming prizes aren't shared, there are only ten people left to win the second prize.
Using this logic, then we can say that nine can win the third prize.

Thus, our answer is 11 · 10 · 9 = 990 ways.

However, this method works for this question.
What happens when the number of places we want gets significantly larger?
That's when we introduce the permutation formula.

We know that 11·10·9·8·7·6·5·4·3·2·1 = 11!, but we don't want 8! of them.
This is the formula for permutation.

^{11}P_3 = \frac{11!}{(11 - 3)!} = 990
8 0
3 years ago
Jennifer taking a quiz and has answered 13 questions so far. If there are 25 questions on Jennifer test, how many questions does
Stels [109]

Answer: 12


Step-by-step explanation: To figure this out you have to subtract 25 by 13

                                                          25

                                                      -   13

                                                        = 12


7 0
3 years ago
What is 2x - 5 =7 please help me I need it in 10 mins
goldenfox [79]
2x - 5 = 7
2x = 7 + 5
2x = 12
2x/2 = 12/2
x = 6

to check:
2x - 5 = 7
2(6) - 5 = 7
12 - 5 = 7
7 = 7
4 0
3 years ago
Read 2 more answers
(m-2)÷5= (m-4)÷3 !!!10 POINTS!!!​<br><br>(I know it's now much but I need help)
koban [17]

Answer:

m=7

m−2

5

=

m−4

3

(m−2)*(3)=(m−4)*(5)

3m−6=5m−20

Step 2: Subtract 5m from both sides.

3m−6−5m=5m−20−5m

−2m−6=−20

Step 3: Add 6 to both sides.

−2m−6+6=−20+6

−2m=−14

Step 4: Divide both sides by -2.

−2m

−2

=

−14

−2

m=7

Step-by-step explanation:

7 0
3 years ago
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