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KatRina [158]
3 years ago
5

Joel bought 8 books. Some books cost $13 each and some cost $17 each. In all, he spent $128. Which system of linear equations re

presents the given situation?
Mathematics
1 answer:
Phantasy [73]3 years ago
4 0
If there are x $13 each books and y $17 each books, then we can build the following equations:
x + y = 8    (or y = 8 - x)
13x + 17y = 128   (or y = 128/17 - 13x/17)
:)
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Identify which equations have one solution, infinitely many solutions, or no solution.
notsponge [240]
First one= x=5
second one= x=1/30 or 0.03 or 30^-1
third one= All real numbers or R
fourth one= No solution
Fifth one= All real numbers or R
Sixth one= p=-10/3 or -3 1/3 or -3.3

R is just the symbol for all real numbers. Also know as infinitely many solutions.

Hope this helps ! :) have a good day! Make sure you eat.
7 0
3 years ago
Each wheel of gias bicycle is 24 inches in diameter gia rides her bike 1,884 feet to the nearest whole number how many times doe
cupoosta [38]

The wheel turned a total of 300 times in 1,884 feet.

Step-by-step explanation:

Step 1:

The wheels of the bicycle have a diameter of 24 inches. So the radius of the wheels is 12 inches.

To determine how many times the wheel turns we divide the distance traveled by the circumference of the wheels.

The circumference of a circle is given by multiplying 2π with the radius.

The circumference of the wheel = 2(3.1415)(12) = 75.396.

The circumference of the wheel is 75.396 inches.

Step 2:

Gia traveled 1,884 feet, we need to convert this into inches.

If 1 feet = 12 inches, 1,884 feet = 22,608 inches.

The number of times the wheel turned \frac{22,608}{75.396} = 299.8567.

Rounding this off, we get that the wheel turned a total of 300 times in 1,884 feet.

6 0
3 years ago
PLEASE EXPLAIN!!!
andrew11 [14]
<span>The easiest thing to do is convert all the measurements to yards...
 18ft = 6 yards
 6 inch = 1/6 yard     ( 6 inches = 1/2 ft.... so 1/6 yard)
  so the volume is V = 6 x 6 x 1/6
 Then all you do is calculate the cost. I hope this helps you out</span>
8 0
3 years ago
What would be the correlation coefficient (r) of the following scatter plot?
luda_lava [24]

Answer:

-0.89 (i think)

Step-by-step explanation:

Since the graph seems to be going downwards from the right, it has a negative correlation. And since the data seems to be pretty close together, the correlation must be strong. That narrows the answer down to -0.89

If its wrong then i'm not a smart person, and it's -0.15

8 0
2 years ago
In quadrilateral $ABCD$, we have $AB=3,$ $BC=6,$ $CD=4,$ and $DA=4$.
vampirchik [111]
The triangle inequality applies.

In order for ACD to be a triangle, the length of AC must lie between CD-DA=0 and CD+DA=8.

In order for ABD to be a triangle, the length of AC must lie between BC-AB=3 and BC+AB=9.

The values common to both these restrictions are numbers between 3 and 8. Assuming we don't want the diagonal to be coincident with any sides, its integer length will be one of ...
{4, 5, 6, 7}
8 0
3 years ago
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