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MAXImum [283]
3 years ago
9

A store owner paid 15 dollars for a book. She marked up the price of the book by 40 percent to determine its selling price.

Mathematics
1 answer:
SpyIntel [72]3 years ago
6 0
Part a: 21 dollars because you multiply .40 with 5 and get 6. you add the 6 to the 15 and get 21.
part b: 30.21 because you multiply 38 by .25 and get the answer for that and then subtract that number from 38. then you multiply 0.06 by 38 and when u get that number, add that to the discounted price.
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Stefan is measuring the angles of a triangle. He measures the first angle and gets a measure of 90°. What does he know about the
SashulF [63]
I 100% positive the answer is <span>C) Their measures should add up to be 90° </span> i just took the test and the answer above me is 100% wrong
7 0
3 years ago
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Help if you know pls
snow_lady [41]

Answer:

c. 16/35

Step-by-step explanation:

2/5 divided by 7/8

2/5 x 8/7

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2 years ago
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Given the set of ordered pairs: {(1,3), (2,7), (x,5), (6,4)}.
MrMuchimi

Answer:

2

Step-by-step explanation:

2 is a value of x that would not make the set a function because a function can't have multiple coordinates wit hthe same domain (x-coordinate). 2 is a domain that has already been used in the point (2,7). If this is used in (x,5), the point would become (2,5) and repeat a domain.

Note:

The x-coordinate could also be 1 or 6 because they have been used as domains as well.

Hope it helps!

8 0
2 years ago
Determine whether the situation is linear or nonlinear, and proportional or nonproportional
Arlecino [84]

Answer:

  linear and non-proportional

Step-by-step explanation:

When the same amount is added each week, the relationship is linear. When the initial value is 50, not zero, the relationship is non-proportional.

6 0
3 years ago
2
rusak2 [61]

Answer:

(1.13, 7.74) and (-4.13, 18.26)

Step-by-step explanation:

This can be solved in two ways:  mathematically and graphically.

<u>Graphing</u>

Plot both lines and find where they intersect.  See the attachment.

The intersection points are (1.13, 7.74) and (-4.13, 18.26)

<u>Mathematical</u>

y + 2x = 10

y = 10 - 2x

y = 3x² + 7x - 4

10 - 2x = 3x² + 7x - 4

3x² + 9x - 14 = 0

Solve this using the quadratic equation:

x = 1.13 and -4.13

Use these two values of x to find y:

y = 10 - 2x

y = 10 - 2(1.13)

y = 7.74

y = 10 -2x

y = 10 -2(-4.13)

y =  18.26

The two points are:

(1.13, 7.74) and (-4.13, 18.26)

7 0
2 years ago
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