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AnnZ [28]
3 years ago
14

How many steel rods are in a staircase frame with 12 steps?

Mathematics
1 answer:
kolbaska11 [484]3 years ago
3 0
180 steel rods to be exact
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The fuel for a chain saw is a mix of oil and gasoline. The ratio of ounces of oil to gallons of gasoline is 9:19. There are 152
LUCKY_DIMON [66]
9/19 = x / 152....9 oz oil to 19 gallons gas = x oz oil to 152 gallons gas
cross multiply because this is a proportion
(19)(x) = (152)(9)
19x = 1368
x = 1368/19
x = 72 oz of oil <==
5 0
3 years ago
Read 2 more answers
PLSSS HELPPP I WILL GIVE BRAINLIESTTTT!!!!!!!
Ksenya-84 [330]

Answer:

yes to both

Step-by-step explanation:

For a relationship to be a function then each value of x must relate to exactly one unique value of y.

This is the case in this table as

2 → 76

4 → 152

6 → 228

All unique values thus a function

To determine if it is linear then the rate of change is constant for each set of ordered pairs. This is measured using the slope formula.

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (2, 76) and (x₂, y₂ ) = (4, 152 ) ← ordered pair from table

m = \frac{152-76}{4-2} = \frac{76}{2} = 38

Repeat with (x₁, y₁ ) = (4, 152) and (x₂, y₂ ) = (6, 228)

m = \frac{228-152}{6-4} = \frac{76}{2} = 38

Since rate of change is constant then function is linear

8 0
2 years ago
A librarian has a set of ten different books, including four different books about Abraham Lincoln. The librarian wants to put t
Darya [45]

Answer:

120960

Step-by-step explanation:

Given that a  librarian has a set of ten different books, including four different books about Abraham Lincoln.

The librarian wants to put the ten books on a shelf with the four Lincoln books next to each other, somewhere on the shelf among the other six different books.

First arrnage the 6 other books in the shelf.  

This can be done in                                        6! ways

Now arrange the 4 books of Lincoln      

This can be done in                                        4! ways

Now we have 7 places to insert Lincoln books including two corners and in between.

Thus this can be done in 7 ways

Total no of ways = 6!(4!)(7) = 120960

3 0
3 years ago
Three fifths of the members of a hiking club went on the last hiking trip. If 39 people went on the trip , how many are in the c
finlep [7]

Step-by-step explanation:

1. Since 39 is 3/5 of the club, divide by 3 to get 1/5 of the club

2. 1/5 of the club is 13 people

3. Multiply 13 by 5 to get 5/5 of the club (which is the whole club)

4. The whole club is 65 people

5. You can check it because 65×3/5=39

4 0
3 years ago
Find the value of x so that the line through the pair of points has the given slope.
MatroZZZ [7]
1 is the answer b/c that's the only number it goes too
3 0
3 years ago
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