Answer:
Step-by-step explanation:
a. Fill in the equation for the cost of Mrs. Ortiz's purchase. Let x represent the cost of a pencil and y represent the cost of a ruler.
__$55__ = __50__ x + __30_ y
b. Fill in the equation for the cost of Mr. Donahue's purchase. Let x represent the cost of a pencil and y represent the cost of a ruler.
__$45__ = __30__ x + __30__ y
c. Circle the best method for solving the system:
Elimination
d. Solve the system using the method you chose.
55 =50x+30y
-1(45) =(30x+30y)-1 = -45=-30x-30y
55 =50x+30y
+ -45=-30x-30y
10=20x
(1/20)10=20x(1/20)
0.50=x
3(55) =(50x+30y )3 = 165=150x+90y
-5(45) =(30x+30y)-5 = -225=-150x-150y
165 =150x+90y
+ -225=-150x-150y
-60=-60y
(1/-60)-60=-60y(1/-60)
1=y
A mechanical pencil costs _$0.50__ and a ruler costs __$1.00__.
e. Check your answer:
$55=50x+30y $45=30x+30y
$55=50(0.5)+30(1) $45=30(0.5)+30(1)
$55=25+30 $45=15+30
$55=$55 $45=$45
A mechanical pencil costs $0.50 and a ruler costs $1.00.
What is meant by cost?In calculus, a cost function is a mathematical formula used to determine how much it will cost to produce a certain number of units. The total cost formula is used to calculate the total cost by combining the variable and fixed costs of providing goods. Total cost = (average fixed cost x average variable cost) x number of units produced. A unit price is defined as a price expressed as a quantity of one, such as $25 per ticket or $0.89 per can. If you have a non-unit price, such as $5.50 for 5 pounds of potatoes, and want to find the unit price, divide the terms of the ratio.The current answer as follows:
a. Fill in the blanks to calculate Mrs. Ortiz's purchase price. Let x denote the price of a pencil and y the price of a ruler.
$55 = 50x + 30y
b.Fill in the blanks with the cost of Mr. Donahue's purchase. Let x represent the cost of a pencil and y represent the cost of a ruler.
$45 = 30x + 30y
c. Circle the best method for solving the system:
Elimination
d. Solve the system using the method you chose.
55 = 50x + 30y - 1(45) = (30x + 30y) - 1 = -45 = -30x - 30y
55 = 50x + 30y + -45 = -30x - 30y
10 = 20x
(1/20)10 = 20x (1/20)
0.50 = x
3(55) = (50x + 30y )3 = 165 = 150x + 90y
-5 (45) = (30x + 30y) - 5 = -225 = -150x - 150y
165 = 150x + 90y + -225 = -150x - 150y
-60 = -60y
(1/-60) -60 = -60y (1/-60)
1 = y
A mechanical pencil costs $0.50 and a ruler costs $1.00.
To learn more about cost, refer to:
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Will mark Brainlyest Use the properties of exponents to simplify the expression(y^3/2 X^-1/2)^4
Answer:
the answer would be y^6/x^2
Step-by-step explanation:
so (Y) to the sixth power over (X) to the second power
what fraction equals to 4
Answer:
confusing wording... read below ( 12/3 )
Step-by-step explanation:
if you meant adding fractions then the other answer, but if i read it right then 12/3. 12 divided by 3 = 4
Name theorem or postulate?
Answer:
SAS
Step-by-step explanation:
A Large earthworm can travel 25 centimeter in 12 seconds. How many meters does the earthworm travels in1 minute?
We know that it can travel 25 centimetres in 12 seconds. First, we break down the minute into seconds.
60/12= 5
______________________________
Now, multiply 25 by 5.
25x5=125
__________________________________
With this knowledge, we just have to convert the centimetres, to meters.
_______________________________
Your answer is 1.25 meters :)
What is the coefficient in the term k?
A.0
B.1
C.2
D.k
PLZ HELP IM BEING TIMED
Answer:
A
Step-by-step explanation:
Simplify the expression.
7y+6−1+12y =
Answer:
19+5
Step-by-step explanation:
7y+6-1+12y
Add common variables
19y+5
Can't be simplified any further without an answer to the equation
Hope this helps. Have a great day. May it be filled with joy and happiness
Answer:
24 x y2
Step-by-step explanation:
7+6=13
13-1=12
12+12=24
There is 2 Y's so you do y to the power of 2.
Graph the line that represents this equation:
y=-5z +2
An ant carries food at a speed of 0.01 m/s. How long will it take the ant to carry a cookie crumb to the ant hill, a distance of 50 m? Express your answer in hours.
Answer:
5000 seconds
Step-by-step explanation:
0.01*100=1
100*50=5000
Answer:
about 1.4 hours
Step-by-step explanation:
1 * 50 / 0.01 = 5,000
5,000 / 60 = 83.3 ---> 83.8 / 60 = 1.4
please help angle c angle ahdbdoneoend
Answer:
True
Step-by-step explanation:
The angle that sees the smallest side length has the small angle measurement.
standard form of 0.000064
Answer:
6.4 × 10^-5
This is the standard form of 0.000064.
Can you help me with these questions pls
f (x) = 2x² - 10x + 13
Find f (-4)
Answer:
85
Step-by-step explanation:
In this question, you would solve by plugging in -4 to x.
Solve:
f(-4) = 2(-4)² - 10(-4) + 13
= 2(16) + 40 + 13
= 32 + 40 + 13
= 72 + 13
= 85
f(-4) = 85
A rectangular parking lot is surrounded on its perimeter by a fence that is 1,200 feet long. If the length of the rectangular parking lot is 5 times its width, w, which equation can be used to find the width of the parking lot? Ow+ (w+5) = 1,200
Answer:
w+5w=1200
Step-by-step explanation:
Alex helps his father milk cows on their dairy farm. They are paid $2.25
per gallon of milk, that they get from their cows. Together, Alex and his
father are able to milk 12 gallons over a 2-hour period. How much money
could Alex and his father expect to earn if they worked for 10 hours?
А
$22.50
B
$54.00
C
$135.00
D
$270.50
Which dot plot matches the tally chart below?
A 2-column table with 5 rows. Column 1 is labeled Pull-ups Completed in one minute with entries 1, 2, 3, 4, 5. Column 2 is labeled Tally with entries 2, 5, 3, 1, 2.
Answer:
(A) my friend
Step-by-step explanation:
please mark Brainliest because the other answer above me is wrong
Answer:
A
Step-by-step explanation:
Jaysen helps his mom in gardening. The produce is sold in the market for $ 17 a bag . This year they sold 25 bags. Jaysen gets 35% of the money that is earned. How much will Jaysen earn
Answer:
Step-by-step explanation:
the money received for 25 bags:
17*25=425
Jaysen get 35%
425*(35/100)=148.75 dollars
Answer:
148,75 $
Step-by-step explanation:
17 × 25 = 425
425 × 0,35 = 148,75
Which situation can be modeled using a linear function? A) the population of yeast that doubles after every minute B) the height of a projectile after it is launched C) the distance covered by a car moving at a constant speed D)the cost of a printing machine that depreciates every year at 2% per year
Answer:
c
Step-by-step explanation:
because the car is moving at a CONSTANT speed meaning the distance will constantly increase
Good night, logging out !
Good night :). Sleep tight!
I need to simplify the complex fraction.
Answer:
(15 – 22x)/4x(2x – 5)
Step-by-step explanation:
Let us take the numerator first:
(1/2x – 5) – (7/8x – 20) = (1/(2x – 5)) – (7/4(2x –5)) = (8x – 20 – 7(2x – 5))/(4(2x – 5)(2x – 5)
= (8x – 20 – 14x + 35)/4(2x – 5)² = (15 – 22x)/4(2x – 5)²
The denominator is: x/2x – 5
So we now have:
(15 – 22x)/4(2x – 5)² ÷ x/(2x – 5) = (15 – 22x)/4(2x – 5)² x (2x – 5) /X = (15 – 22x)/4x(2x – 5)
What is the value of y = 3x -1 when x is equal to 4?
Answer:
11
Step-by-step explanation:
Y = 11 when x is equal to 4.
y = (3)(4) − 1
Answer:
y = 11
14 books in 2 boxes; 20 books in 3 boxes
O Yes, they are proportional
O No, they are not proportional
Answer:
No of course not
Step-by-step explanation:
14x2=24
20x3=60
The Blues Festival sold 20% of tickets at a reduced price of $30 and 30% of tickets at $40 and the rest at the door for full price of $50. With 10,000 tickets sold, how much did they earn from ticket sales in dollars?
Answer:
$430,000
Step-by-step explanation:
20% of 10,000 = 2000
therefore, 2000 x $30 = $60,000
30% of 10,000 = 3000
therefore, 3000 x $40 = $120,000
50% of 10,000 = 5000
therefore, 5000 x $50 = $250,000
add all dollar amounts together to get $430,000
did i do this right if not can you show me how to do it
Answer:
no
Step-by-step explanation:
Order of operations
18/2=9
9/3=3
5-2=3
3/3
1 (simplified)
The outcome is still the same but since you have to show your work.....That's the correct way to do it
Hope this helps. Have a nice day.
in the following figures find the value of angle COD if angle abc is equal to 75 degree and a b is equal to CD
Angle AOB is given as 75 degrees.
O is the center of the circle so AO and CO are the same length. AB and CD are the same length, so angle COD would be the same as AOB
COD = 75 degrees.
Answer:
75°
Step-by-step explanation:
It is given that:
AB and CD are chords of the circle which are equal. Equal chords subtends equal angles at the center of the circle. [tex] \because m\angle AOB = 75\degree [/tex] [tex] \therefore m\angle COD = 75\degree [/tex]which one is it???? .
Answer:
option A, I guess .....
.
In the inequality
a> 3x+8 or a>-4x-1, which value of a does the solution consist of numbers greater than -6 and less than 5?
A-16
B-26
C-19
D-23
Answer:
I think it is B correct me if I am wrong
Step-by-step explanation:
Class A has 26 pupils and class B has 15 pupils.
Both classes sit the same maths test.
The mean score for class A is 33.
The mean score for both classes is 39.
What is the mean score (rounded to 1 DP) in the maths test for class B?
Answer:
Concept: Real World Analysis
So we know A has an average of 33We know A+B/2= 39Hence we will solve for b [tex] \frac{33 + x}{2} = 39[/tex][tex]x = 45[/tex]Answer:
It's 49.4
Step-by-step explanation:
((26*33)+(15*x))/41＝39
((858)+(15*x))/41＝39 ‖*41
(858)+(15*x)＝1599 ‖-858
15*x＝741 ‖/15
x＝49.4
which expression is the best estimate of 1 1/5 X 3 2/3
A: 2 X 3
B: 1 X 4
C: 2 X 3
D: 1 X 3
cynthia and amy are customer service representives cynthia earns $13 per hour and amy earns $1.50 more per hour than cynthia. Amy worked 43.5 hours in the last two weeks which equation could she use to find the amount of money she should receive
Answer:
Step-by-step explanation:
Let h bet the # of hours worked
If Cynthia earns $13 per hour then her equation would be:
C = $13h
If Amy makes $1.5 more per hour then her equation would be:
A = $14.5x
Now lets plug in some numbers:)
A = $14.5(43.5)
A = $630.75