Answer:
12 pencils
Step-by-step explanation:
let no. of pencils bought be x.
54 - 0.75x - 2.50 = 42.50
9 = 0.75x
x = 12
Topic: algebraic equations
If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!
1.
If a truck that is traveling at 15 mph speeds up to 45 mph in 10 seconds, what is the truck’s acceleration?
Answer:
3miles per hour^2
Step-by-step explanation:
given data
initial speed u= 15mph
final speed v=45mph
time taken t= 10 seconds
Step two:
Required
acceleration a=?
applying the first equation of motion
v=u+at
substitute we have
45=15+a*10
45=15+10a
make a subject of the formula
45-15=10a
30=10a
divide both sides by 10
a=30/10
a=3miles per hour^2
what is called the slopes of parallel lines ?
Answer:
Im not smart sorry
Step-by-step explanation:
Part C
Joe creates a new email account. In October he receives 120 emails and in November he receives 177 emails. Joe says the percent change from October to November
is calculated by taking the ratio of the difference between the number of emails received in November and October to the number of emails received in November
Therefore, he says, the percent change, rounded to the nearest whole percent is 32%. Is he correct?
i
Answer: I belive he is right
Step-by-step explanation:
Answer:
yes he is correct
Step-by-step explanation:
Solve the
Solve the system using elimination.
5x + 8y = –29
7x – 2y = –67 system using elimination. 5x + 8y = –29 7x – 2y = –67
Answer:
The answer is (-9, 2)
Step-by-step explanation:
Trust me its actually correct
Pls mark me as brainliest
Terrell wrote that 5 – 4.2 = 8. Which statement about his answer is true? CLEAR CHECK 8 is wrong because a number gets smaller, not larger, when you take 4.2 from it. 8 is right because 50 – 42 = 8. 8 is right because 4.2 + 8 = 5. 8 is wrong because you cannot subtract a decimal from a whole number.
Answer:
a) is wrong because a number gets smaller, not larger, when you take 4.2 from it
Step-by-step explanation:
Given
[tex]5 - 4.2 = 8[/tex]
Required
Determine which of the options is true
First, we need to solve for 5 - 4.2
[tex]5 - 4.2 = 0.8[/tex]
Compare this answer with Terell's answer (8)
We observe that: [tex]0.8 \neq 8[/tex]
This implies that; Terell is wrong
The two options that support the answer being wrong are (a) & (d)
Analyzing (a):
5 should get smaller when 4.2 is subtracted from it.
This isn't the case in Terell's solution.
Hence, (a) is true
Analyzing (d):
d is wrong because a decimal can be subtracted from a whole number
Hence, (a) answers the question
write 62/15 as a mixed number.
Answer:
4 & 2/15Step-by-step explanation:
Answer:
[tex]4\frac{2}{15}[/tex]
Step-by-step explanation:
A mixed number is a number that contains an integer with a proper fraction eg: [tex]1\frac{1}{2}[/tex]. The fraction that is given is improper and can be turned into a mixed number to simplify it.
First, we need to find how many times 15 goes into 62:
62÷15 = 4r2
This can then be written as the mixed fraction: [tex]4\frac{2}{15}[/tex].
I hope this is clear :)
Write a polynomial function that has the zeros -3, 1, -1 and has a leading coefficient of 1.
Answer:
x3+3x2-x-3
Step-by-step explanation:
What is the slope of a line that is perpendicular to the graphed line?
Answer:
The slope of the line perpendicular to the graphed line is 2.
Step-by-step explanation:
The Slope of a Line
Suppose we know the line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:
[tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}[/tex]
The graphed line passes through two visible points (0,4) and (8,0). Thus, its slope is:
[tex]\displaystyle m=\frac{0-4}{8-0}[/tex]
[tex]\displaystyle m=\frac{-4}{8}[/tex]
Simplifying:
[tex]\displaystyle m=-\frac{1}{2}[/tex]
Two lines of slopes m1 and m2 are perpendicular is:
[tex]m_1.m_2=-1[/tex]
Suposse the given line has slope [tex]m_1=-\frac{1}{2}[/tex]. To find m2, we solve the above equation:
[tex]\displaystyle m_2=-\frac{1}{m_1}[/tex]
Substituting:
[tex]\displaystyle m_2=-\frac{1}{-\frac{1}{2}}[/tex]
Operating
[tex]m_2=2[/tex]
The slope of the line perpendicular to the graphed line is 2.
A new video game is expected to sell 120 copies the first hour at a local game store. After that, the sales will follow the function s(x) = 15(x - 1) where x is the number of hours. What is the
function that shows total sales, including the first hour? (1 point)
s(x) = 15(x - 1) - 120
s(x) = 120x - 15
Os(x) = 120 + 15(x - 1)
Os(x) = 120 - 15(x - 1)
Answer:
X=104
Step-by-step:
Sorry IF my answer is wrong
Answer:
Os(x) = 120 + 15(x - 1)
Step-by-step explanation:
The total sales will be the sum of the constant 120 copies that were sold in the first hour and the sales in the subsequent hours, represented by the function s(x) = 15(x-1).
Thus, add 120 to the function s(x).
Is 14 a rational number.?
Answer:
yeees
Step-by-step explanation:
Round the fraction to the nearest whole number.
2
9
Answer:
3
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
Select all the ordered pairs that make this statement true?
3x + 4y = 36
(3,-2)
(1,7)
(0,0)
(24,-9)
(0,9)
(4,6)
(-12,18)
Answer: (24,-9)
(0,9)
(4,6)
Step-by-step explanation:
3x + 4y = 36
Using (3,-2) will be:
= 3(3) + 4(-2)
= 9 - 8 = 1
Using (1,7) will be
= 3(1) + 4(7)
= 3 + 28 = 31
Using (0,0) equals to 0
Using (24,-9) will be:
= 3(24) +4( -9)
= 72 - 36 = 36
Using (0,9) will be:
= 3(0) + 4(9)
= 0 + 36 = 36
Using (4,6) will be:
3(4) + 4(6)
= 12 + 24
= 36
Using (-12,18) will be:
= 3(-12) + 4(-18)
= -36 - 72
= -108
The correct options are (24,-9), (0,9 and (4,6)
the vertices of a sand box are p(12, 14) ,Q(12,, 17), R(16, 17), AND S(16,14). THE COORDINATES ARE MEASURED IN FEET WHAT IS THE PERIMETER OF THE SANDBOX
Answer:
p= 14
Step-by-step explanation:
sorry if the pic is blurry but side PQ=3, side QR=4, side RS=3, side SP=4
perimeter= length+length+width+width
perimeter=3+3+4+4
perimeter=6+8
perimeter=14
The equation of a line is y = 2x − 6. Find the slope and y-intercept of the line.
Answer:
Slope is 2 and y-int is -6
Step-by-step explanation:
y=mx+b
M is slope
B is y-int
Answer:
The slope is 2 and the y intercept would be -6
Step-by-step explanation:
y=mx+b where M would be the slope and b is the y intercept. Fill in the formula and there you have the slope and the y intercept. Good luck!
Chris ate 1/4 of the pizza.if the pizza has eight slices, how many slices are lef
Answer:
6
Step-by-step explanation:
1/4 = 2/8
8/8 - 2/8 = 6/8
This means 6 slices are left out of 8 slices.
please help ill give brainliest to right answer
Answer: D y:2/5x
It correct
whats 100x100x100 idk wht it is
Answer:
100,000,0
Step-by-step explanation
To solve this problem you need to start with 100, since 100 has 2 zero's you want to add 2 zero's 2 times in a row, like this-- 100+00=10,000+00=100,000,0.
Thus your answer: 100,000,0
On a coordinate plane, 2 lines intersect around (3.8, negative 1.5).
Given the graph of a system of equations, which statements are true about the solution? Check all that apply.
The x-value is an integer.
The x-value is between 3 and 4.
The y-value is between –2 and –1.
The x-value is positive.
The x- and y-values have the same sign.
Answer:
B, C, D
Step-by-step explanation:
its correct
Answer:
B. The x-value is between 3 and 4.
C. The y-value is between –2 and –1.
D. The x-value is positive.
Pleaso only answer is you know, explain your answers for brainlest!!!
Answer:
First of all I don’t see a question the only reason I clicked onto it was because of the brainlest which I can assume I won’t get since I didn’t answer anything (because there is nothing to answer)
Step-by-step explanation:
ABC has coordinates A (1,4), B(5,5), C(2,2). Which of the following sets of coordinates are the vertices of a triangle that is congruent to ABC?
Answer: B
Step-by-step explanation: B (-5,1) , (-1,0), (-4,3)
Just took the quiz.
Answer:
LG=MN
T=V &RS=WU
not enough info
not enough ingo
-5,1 -1,0 -4,3
Step-by-step explanation:
jef=svf by sss
efj=fvs by sss
gk=gk
SAS
ACB=ECD
SAS
Asking again! Please solve! For both! Brainliest and lots of points!
Answer:
1 D (10, 120)
2 C (20, 40)
Step-by-step explanation:
Answer:
its what the other person said
At a grocery store, 5 oranges cost $2.00. At this rate, how much would 12 oranges cost?
Answer:
Step-by-step explanation:
2.00/5= 0.40 an orange
12*.40= $4.80
3 5/6 + (-1 1/6)
plz help me with this.
Answer:
3 5/6 + (-11/6) --> 2 2/3
Step-by-step explanation:
Step 1: 3-1--> 2
Step 2: 5/6 - 1/6 --> 2/3
Final Answ. : 2 2/3
PLZ HELP ME!! TY I WILL MEAN SO MUCH NO CAP!
Answer:
-8
Step-by-step explanation:
Find the unit rate of 30 inches per 5 years
Answer: It is 6in per year
Step-by-step explanation:
Answer:
6 inches per year
Step-by-step explanation:
30 / 5 = 6
6 inches per year
4) Melissa and Trina are training for a marathon. This week, Melissa ran 3 fewer than twice as many miles as Trina. Together they ran 39 miles this week. Write and solve an equation to determine how many miles Trina ran.
Answer:
(14x+14)-3=39
Step-by-step explanation:
Answer:1
1
Answer is 14
Step-by-step explanation:
X+2X-3=39
3X-3=39
3X=42
Divide by 3 on both sides.
Joseph needs 345 cement blocks to build a wall 40 cm thick. He needs 205 cement blocks to build a wall 25 cm thick. Each block costs $0.75. How much more will the thicker wall cost?
9514 1404 393
Answer:
$105
Step-by-step explanation:
The thicker wall takes 345 -205 = 140 more blocks. Each of those costs $0.75, so the added blocks will cost ...
140 × $0.75 = $105
The thicker wall will cost $105 more.
I’ll give Brainliest (need ASAP)
Answer:
1.55
Step-by-step explanation:
you just change the fractions to decimals
Write the expression in simplest form.
Answer: Um, the answer is 8?
Step-by-step explanation:
Solve for y. 10y - 5 = -20
