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padilas [110]
2 years ago
8

The cost of a pen at the office supply store is $2.65. the school store sells the pen for $3.45. How much does the school store

markup the pen? Find the percent increase. 0.80/ 2.65=____%
Mathematics
1 answer:
denis23 [38]2 years ago
7 0

Answer:

30.1%

Step-by-step explanation:

The increase in price (markup) is ($3.45 - $2.65) = $0.80.

The increase in price (as a decimal fraction) is 0.80/2.65, or 0.301; as a percentate, this is 30.1%

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The difference of two numbers, a and b, is 21. The difference of 5 times a and two times b is 18. What are the values of a and b
PSYCHO15rus [73]
A-b=21
5a-2b=18

We can use substitution here. Take the first equation and solve for A. (Picking this one because it's easy)

a = 21+b

Plugin to the second equation:5(21+b)-2b=18
Simplify: 105 + 5b - 2b = 18
Simplify: 105 + 3b = 18
Subtract both sides: 3b = 18-105
Simplify: 3b = -87
Divide: b = -29

Plug back into the first: a=21+b
a = 21 - 29
a = -8

Option D

6 0
3 years ago
How does the sum of the interior angles change as you move the vertices of ABC to create a triangle of your choice
lbvjy [14]

Answer:

Depending on the type of triangle you form, the interior angles will either decrease or increase.

Step-by-step explanation:

if you move the vertices to form an equilateral triangle then the interior angles will change to 60°, 60°, 60° because all interior angles of an equilateral triangle are the same and the sum of the interior angles of any triangle always add of to 180°

3 0
2 years ago
Find the value of x........................
Ann [662]

Answers: x = 4 and y = 3

============================================================

Explanation:

Triangle UBD is congruent to triangle RAN

Note the order of the lettering as it's important.

BD and AN are the last two letters of UBD and RAN in that order. Therefore, these sides correspond and BD = AN. From that, we know,

BD = AN

2y+5 = 3y+2

5-2 = 3y-2y

3 = 1y

y = 3

-----------

Using similar logic, UD and RN are the first and last letters of UBD and RAN respectively. So,

UD = RN

15 = 2x+7

2x+7 = 15

2x = 15-7

2x = 8

x = 8/2

x = 4

3 0
2 years ago
The admission to a local fair is $10 for each adult and $6 for each child. Each ride costs $1.50 for an adult and $1 for a child
S_A_V [24]
So first start out by writing an expression for the cost of the child and the adult separately.

Child:
6 + 1r   ($6 + $1 per ride)

Adult:
10 + 1.5r   ($10 + $1.50 per ride)

to find how much more the adult will spend, just do Adult Expression - Child Expression which will be:

10 + 1.5r - (6 + 1r)  just simplify this

For Part B, use your equation from part A where r = 7
6 0
3 years ago
Which shows the correct substitution of the values a, b, and c from the equation 1 = –2x + 3x2 + 1 into the quadratic formula?
Alchen [17]
1=-2x+3x^2+1\\\\3x^2-2x+1-1=0\\\\3x^2-2x=0\\\\\boxed{a=3;\ b=-2;\ c=0}
6 0
3 years ago
Read 2 more answers
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