Answer:
81 pencils
Step-by-step explanation:
1. Set up variables
Pencils = p
notebooks= n
2. Set up a system of equations
p+n= 135 (The amount of supplies bought)
1.75n +0.35p = 122.85 (Equation for the cost)
3. Solve the system of equations (I'll use substitution)
a)p= 135-n (I just rearranged it)
1.75n + 0.35p= 122.85
b) Substitute the first equation into the second)
1.75n + 0.35(135-n) = 122.85
c) Solve!
1.75n + 47.25 - 0.35n = 122.85
1.4n = 75.6
n= 54
Serena bought 54 notebooks!
4. Substitute the number of notebooks into the first equation
p +n = 135
p + 54= 135
p = 81
Serena bought 81 pencils!!!
I hope this helps!!!!
Answer:
Serena purchased 81 pencils
Step-by-step explanation:
Let x = the number of pencils Serena bought
Let 135 - x = the number of notebooks Serena bought
1.75(135 - x) + .35x = 122.85 Multiply both sides of this equation by 100.
175(135 - x) + 35x = 12,285
23,625 - 175x + 35x = 12,285
-140x = -11,340
x = 81 pencils
The front of Rosie's house is similar in shape to the front of Sparky's doghouse. The base of the doghouse is 6 feet and the height is 5 feet. If the height of Rosie's house is 27.5 feet, what is the length of its base? If necessary, round your answer to the nearest tenth.
1. 22.9 ft pick and awnser!! :)
2. 28.5 ft
3. 33 ft
4. 30 ft
Answer:
33feet
Step-by-step explanation:
If the base of the doghouse is 6 feet and the height is 5 feet, we can write;
6 feet base = 5 feet height
To get the length of the base if the height is 27.5feet
x feet base = 27.5 feet high
Divide both expressions
6/x = 5/27.5
5x = 6 * 27.5
5x = 165
x = 165/5
x = 33ft
Hence the length of its base will be 33feet
Please help immediately!!
Answer:
hjd
Step-by-step explanation:
Factor the quadratic x^2-8x +16
Answer:
(x-4)^2
square root everything in the equation
What is the Mean Absolute Value?
Answer:
Mean absolute deviation (MAD) of a data set is the average distance between each data value and the mean. Mean absolute deviation is a way to describe variation in a data set. Mean absolute deviation helps us get a sense of how "spread out" the values in a data set are.
Step-by-step explanation:
The population of deer forest is currently 800 individuals. Scientists predict that this population will grow at a rate of 20 percent per year.
Answer:
C. 3.8 years
Step-by-step explanation:
Exponential Growth
The natural growth of some magnitudes can be modeled by the equation:
[tex]P(t)=P_o(1+r)^t[/tex]
Where P is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.
The actual population of deer in a forest is Po=800 individuals. It's been predicted the population will grow at a rate of 20% per year (r=0.2).
We have enough information to write the exponential model:
[tex]P(t)=800(1+0.2)^t[/tex]
[tex]P(t)=800(1.2)^t[/tex]
It's required to find the number of years required for the population of deers to double, that is, P = 2*Po = 1600. We need to solve for t:
[tex]800(1.2)^t=1600[/tex]
Dividing by 800:
[tex](1.2)^t=1600/800=2[/tex]
Taking logarithms:
[tex]t\log 1.2=\log 2[/tex]
Dividing by log 1.2:
[tex]t=\frac{\log 2}{ \log 1.2}[/tex]
Calculating:
t = 3.8 years
Answer: C. 3.8 years
Answer:
3.5 years
Step-by-step explanation:
what is the soultion to x in this and rounded to the nearest tenths 5x−110=447
Answer:
111.4
Step-by-step explanation:
Dear math why don't you grow up and solve your own problems
Answer:
LOL
Step-by-step explanation:
Answer:
Step-by-step explanation:
Yes
How do you do ratios and proportion?
Answer: Ratios and Proportions - Proportions - In Depth. A proportion is simply a statement that two ratios are equal. It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. The following proportion is read as "twenty is to twenty-five as four is to five."
HOPE THIS HELPS
45.6 kg = ____ dag
I will make you brainliest
Answer:
45.6
Step-by-step explanation:
i looked it up for you
Answer:
it will be 4560
Step-by-step explanation:
1 kg equals 100 dag
What is the scale factor?
Answer:a scale facter is a scale of how much is one each side or corner and the shape
Step-by-step explanation:
the table gives information about the lengths of time spent in hours, some children spent watching Tv last week
The data in the table is plotted by using a histogram as shown in the diagram attached below.
What is a histogram?
A histogram can be defined as a type of chart that is used to graphically represent a group of data points (statistical information) into user-specified ranges through the use of rectangles.
Generally, the area of each rectangle is directly proportional to the data frequency and its width is equal to the class interval.
Given the following data:
Length of time (t) Frequency.
0 ≤ t < 10 810 ≤ t < 15 1515 ≤ t < 20 1020 ≤ t < 30 11The vertical axis (y-axis) of the histogram would be used to represent the frequency density while the horizontal axis (y-axis) of the histogram would be used to represent the lengths of time spent (in hours) spent by the children in watching Tv last week as illustrated in the diagram below.
Read more on histogram here: https://brainly.com/question/21304143
Can someone actually help with this not traditional reference angle question
Answer:
Step-by-step explanation:
If f(x) = 0, what is x?
Answer:
0
Step-by-step explanation:
Your welcome
2. The standard dose of medicine for a dog is 10 grams for every 15
pounds of body weight. What is the standard dose for a dog that weighs
120 pounds?
Answer:
8 will be your answer
Step-by-step explanation:
Find the LCM of the following
a) 6, 9, 15
b) 3, 12, 16
c) 8, 9, 12
d) 24, 18
e) 21, 28
f) 18, 42
Answer:
A. LCM of 6,9, and 15 is 90.
B. LCM of 3,12, and 16 is 48.
C. LCM of 8,9, and 12 is 72.
D. LCM of 24 and 18 is 72.
E. LCM of 21 and 28 is 84.
F. LCM of 19 and 42 is 798.
Step-by-step explanation:
Hope this helps! :)
Does the graph represent a function? Choose the correct descriptor.
Answer:
NO
Step-by-step explanation:
Thats an absolute value function, an absolute value function can not be negative
Answer:
Not a function.
Step-by-step explanation:
Do the vertical line test. If a line can go from top to bottom and touch the line twice, then it is not a function. A line like this would touch twice on this graph, so it is not a function.
Question 1
What is another name for line k?
Answer:
FG i think... sorry if i am wrong
Step-by-step explanation:
helpppppppppppppppp
Answer:
f(5) = -11
Step-by-step explanation:
Given that,
f(x) = 4-3x ....(1)
We need to find the value of f(5).
Put x = 5 in equation (1)
f(5) = 4-3(5)
= 4-15
= -11
So, the value of f(5) is equal to -11.
(**10 POINTS**)
Create two expressions, 1 in the form a (b+c) and a (b - c), that equal 100.
Answer:
2(25+25) for the first one, sry if that deosnt work.
Step-by-step explanation:
Which expression is equivalent to the given expression? Assume the denominator does not equal zero. (4m^5n^2 / m^2n)^3
Answer:
Step-by-step explanation:
Hope this Helps ;)
Find the volume of the figure below. 5 cm 11 cm 66 cm 82.5 cm 132 cm 165 cm
Answer:
A) 66cm³
Step-by-step explanation:
Using the Pythagorean Theorem, the base of the triangle is 4. The area of a triangle is 1/2 base times height. Then you multiply times 11 to get the volume.
1/2(3)(4)(11)=66
subtract 1x²-2x-6 from -6x + 5
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! I DONT KNOW HOW TO GRAPH SO
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! I DONT KNOW HOW TO GRAPH SO CAN YOU SHOW ME HOW TO DO IT PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLS DRAW IT
Is there a solution YES OR NO AND WHAT IS THE SOLUTION?
Answer:
yes there is a solution its
(2,-2)
Answer:
Yes, there should be a solution.
Step-by-step explanation:
y = -2x + 2; slope is -2.
It is graphed at (0, 2) (1, 0)
You could write this as y = -2x
y = 2x - 6; slope is 2.
It is graphed at (0, -6) (3, 0)
You could write this as y = 2x - 6
I did as much as I could, hope this helps. Good luck hun! I don't expect brainliest.
Use the pattern on the table to find the x and y intercepts (fill in the the rest of the table )
Answer: 8
Step-by-step explanation:
2 - 8 = -6
ASAP PLZ HELP I will give brainlyleist
Answer:what is the questionStep-by-step explanation:
In the scale used on a blueprint, 34
3
4
inch represents 4 feet. On the blueprint what is the length of a room with an actual length of 20 feet?
Answer:
67
Step-by-step explanation:
123£
24. Make a probability model for the following. You have a raffle in which tickets cost $30.
1st prize is $2000 and has a probability of 1/1000
2nd prize is $300 and has a probability of 1/250
3rd prize is $150 and has a probability of 1/125
Answer:
uh 1/3???
Step-by-step explanation:
Use addition to solve the linear system of equations. (2x+y=5, 3x+2y=4)
Answer:
Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.
Point Form:
(6,−7)
Equation Form:
x=6,y=−7
Step-by-step explanation:
An expression is shown.
47.845+3.32
What is the value of the expression?
A.
48.177
B.
51.165
C.
481.77
D.
511.65
Answer:
The correct answer is B. 51.165
20 POINTS!!!
b-74 = 12
explain your thinking
Answer:
86
Step-by-step explanation:
Step 1: Collect liketerms by switching to the terms tgat are alike to the other sideb=12+74
NOTE: while switching, the signs change to the oppositeStep 2: Add 12 + 74b=12+74
b=86
Answer:
B=86
Step-by-step explanation:
So first step is add 74 to 12 because if you subtracted b with 74 and to reverse that you have to add and 74+12=86 and that is what b equals