Answer:
1. The expression that represents the total number of DVDs Suzie has is d + 39
2. The expression for the amount Dave pays for t hours of practice in a month is 10 + 2 × t
3. The expression for the total cost for n people invited for the party is $50 + $5 × n
4. The expression for the perimeter of a square with side length, x is 4 × x
5. The expression for the total cost of pizza with n extra toppings is $8 + $2 × n
6. The expression for the total cost in phone charges after t months is $25 + t × $15
7. The expression for the total number of hockey sticks for n players is 4 × n
8. The relation that represent the term for each number pattern is given as follows;
Value = nth term of number
9. The relation for the perimeter of an equilateral triangle with side length k is given as follows;
Perimeter of an equilateral = 3 × Side length
∴ Perimeter of the given equilateral triangle = 3 × k
When k = 15, we have;
Perimeter of the equilateral triangle = 3 × 15 cm = 45 cm
10. a) The relation for the total cost of j jersey is $50 + $15 × j
b) The relation for the total cost of j jersey by the other company is $80 + $12 × j
c) The charges for 12 jerseys by the first company is $50 + $15 × 12 = $230
The charges for 12 jerseys by the first company is $80 + $12 × 12 = $224
Therefore, the second company will charge less if 12 jerseys are ordered
11. The real life situation that could be represented by each relation are;
a. n + 7
For every mass in grams of goods bought, n, we get a 7 gram mass of packaging
b. 4s + 5
The distance from a point covered by jogging at 4 m/s after s seconds while starting at 5 meters away from the point in the direction of jogging
12. a) The relation for the total number of music stand is n/2
b) The relation for the total number of chairs is n + 4
c) The relation for the total number of sheets of music is 7 × n
Step-by-step explanation:
Which expression is equivalent to the question?
Answer:the third one I suppose
Step-by-step explanation:
Find the slope of the line that passes through the points M(0,2) and N (1,7)
A. 1
B.-1
C.5
D.-5
Answer:
Hi... Your answer is... C=5
Question 8 of 10
What is the solution to the inequality?
15 < 4 + x
Answer:
11<x
x>11
first u subtract 4 on both sides
which leaves u with 11 on the left and x on the right
I think It's 11 I'm not sure
sue has 18 sweets, tony also has 18 sweets, sue gives tony x sweets, sue eats 5 of her sweets, tony then eats half of his sweets. write an expression for the number of sweets sue and tony now have
Answer:
s(18 - x)-5 t(18x/2) is initial
they now have;
t( 9x) s(13-x)
Step-by-step explanation:
Which type of work is an electrical engineer most likely to do?
Answer:
wiring probably.
Step-by-step explanation:
which pair of lines is the graph...
If you subtract 18 from my number and multiply the difference by -2, the result is -20. What is Saras number
Answer:
28!
Step-by-step explanation:
28 - 18 = 10,
10 x -2 = -20
find the measure of angle in the circle
Answer:
x = 5 which mean that if you replace 5 with the x you will get 90 as your answer.
Step-by-step explanation:
Answer:
x=5
Step-by-step explanation:
∠17x+5≅∠18x
17x-18x=-5
-x=-5
x=5
17x5+5=90°
18x=90°
2x+y<-6
graph the inequality on the axes below.
Answer:
1 point on (0,-6) and the other on (-3,0)
the left side of the graph should be shaded if you need to
Step-by-step explanation:
Suppose 2,400 spectators attend at leas one game this soccer season. Use ther survey data to estimate the number of spectators who attended 5 or more games this season
Answer:
800 spectators
Step-by-step explanation:
Using the survey provided above, we can see that the survey population is a total of 150 spectators by adding up all of the spectators. Since only 50 spectators attended 5 or more games then that means that the percentage of the survey population that attended 5 or more games is ...
50 / 150 = 0.3333 or 33.33%
Therefore, if we are supposing that 2,400 spectators attended at least one game this season then we can multiply this population by the percentage of people who tend to attend 5 or more games in order to actually calculate the total number of people who will attend 5 or more games this season.
2,400 * 0.3333 = 800 spectators
Can someone help me out
Jane needs $150 for the hot air balloon ride. She already has $45 and she can earn the rest by working 12 hours at her job. If h represents her hourly earnings, which of the following equations can be solved to find
Jane's hourly earnings? Circle two correct equations.
150 = 12h
12 = 150 - h
150 = 45 + 12h
150 + 45 = 12h
150 = 12h + 45
Answer:
C and E
Step-by-step explanation:
C and E are the only ones that are the same and represent the excerpt
Hope this help s plz mark brainliest if correct :D
Answer:
the last answer and the 3rd one
Step-by-step explanation:
Don’t know how to simplify this need answer
Answer:
me either jvyvyhvy
Can i get a little help with this?
Answer:
c
Step-by-step explanation:
hope this helps
:)
Answer:
C
Step-by-step explanation:
I need help! Thank you :)
Answer:
parallel
Step-by-step explanation:
Answer:
Parallel
Step-by-step explanation:
If you graph these on a graph the beginning part is the same however the second part (the 2 and 30) are different which would just show how far to space the lines because those are the y-intercept and the fraction part is the slope
Can someone help and explain how you got the answer? Thanks^^
Answer:
C) (0,5)
Step-by-step explanation:
f(x) is y and x is x
The table is providing you with points
y-y over x-x gives you a slope of -5
Use the points and turn it into a point-slope equation and convert to y-intercept equation
y-15=-5(x+2)
y-15=-5x-10
y=-5x+5
So the y-intercept is 5 or (0,5)
Translate the word phrase into a math expression.
12 meters longer than his throw.
t−12
t ÷ 12
t + 12
12 × t
answer right and get brainliest
Answer:
t+12
Step-by-step explanation:
brainliest por favor ❤❤
Answer:
t+12
Step-by-step explanation:
12 meters longer means that you're adding meters onto the throw. Hope that helps :)
Solve the system of equations from Problem #4.
A:(4, -1)
B:(-1, -3)
C:(16, 4)
D:(9, 1)
Answer:
A. (4,-1)
Step-by-step explanation:
solving by addition/elimination
2x-5y=13 *(2)
4x-10y=26
-8x+10y=-42
_________
-4x= -16
x= 4
2(4)-5y = 13
8-5y=13
-5y=5
y= -1
Find the slope of the line in the simplest form.
A. m= 5/1
B. m= -1/5
C. m= -0.2
D. m= -5/1
what is the answer to this
3a+2b-a-3b
Answer:
Step-by-step explanation:2a-b
Answer:
2a-b
Step-by-step explanation:
We can start by grouping our A's and B's, while making sure to keep their individual signs.
For our A's, we get 3a-a and for our B's, we get 2b-3b.
When we simplify our A's, we get 2a and when we simplify our B's, we get -b.
After grouping them back together, you end up with 2a-b.
Solve the equation for the given variable.
A-(r+k/4 )
f for r
Answer:
This is a really complicated variable for me. I am very good at math though.
Step-by-step explanation:
At time t=0 hours, a tank contains 3000 litres of water. Water leaks from the tank. At the end of every hour there is x% less water in the tank than at the start of the hour. The volume of water, in litres, in the tank at time t hours is Vt. Given that Vt=KtV0 V2=2881.2 work out the value of k and the value of x.
Answer:
x = 2; K = 0.98
Step-by-step explanation:
At time, t = 0, Volume of Water = 3,000 litres
After t hours , the Volume of water in the tank = Vt
At the end of every hour there is a x% less water in the tank then at the start of the hour
After 1 hour, volume of water left Vt = V1
V1 = 3,000 - 3000 × (x/100)
V1 = 3,000 - 30x
After 2 hours, Volume of water left is V2
V2 = (3,000 - 30 x) - (3,000 - 30 x) × (x/100)
V2 = (3,000 - 30 x) - (3000x - 30x²)/100
V2 = {100(3000 - 30x) - x(3000 - 30x)} /100
V2 = {(3000 - 30x)(100 - x)}/100
Recall, V2 = 2881.2
Therefore
{(3000 - 30x)(100 - x)}/100 = 2881.2
(3000 - 30x)(100 - x) = 288120
300000 - 3000 x - 3000 x + 30 x² = 288120
30 x ² - 6000 x + 11880 = 0
Dividing both sides by 30
x² - 200 x + 396=0
Factorizing:
(x -198)(x-2) = 0
x = 198 or x = 2
Since the percentage by which the water reduces cannot be greater than 100, x = 2 is chosen.
Step 2: Solving for k
Given that Vt=KtV0
K = Vt/V0
At t = 1
V1 = 3000 - 30x
V1 = 3000 - 30 × 2
V1 = 3000 - 60
V1 = 2940
K = 2940/3000
K = 0.98
Help pls!
13x - 14 = - 118
- 13x =
13x - 14 = -118
13x = -104
x = -8
please help :(
What is the equation of the line that passes through the point (2,-6) and has a slope of -1?
Answer:
y = -x - 4
Step-by-step explanation:
Plug in the point and slope into the equation y = mx + b, and solve for b:
y = mx + b
-6 = -1(2) + b
-6 = -2 + b
-4 = b
Then, plug in b and the slope into y = mx + b
y = -1x - 4
y = -x - 4 is the equation of the line
what’s is the answer to (-20)-7= I’m confused
Answer:
140
Step-by-step explanation:
You just multiply them together! :)
Answer:
-27
Step-by-step explanation:
(-3/4)(-1 3/4)
evaluate
Answer:
5 1/4
Step-by-step explanation:
Simplify
(-1+4i)(9-4i)
Answer:
B 7+40iStep-by-step explanation:
2.3×10⁹=(1×10³)(2.3×10^n)
Answer:
n = 6
Step-by-step explanation:
2.3 × [tex]10^{9}[/tex] = (1 × 10³)(2.3 × [tex]10^{n}[/tex] )
(1 × 10³)(2.3 × [tex]10^{n}[/tex] ) = (1)(2.3) × (10³)( [tex]10^{n}[/tex] ) = 2.3 × [tex]10^{3+n}[/tex]
2.3 × [tex]10^{3+n}[/tex] = 2.3 × [tex]10^{9}[/tex] ⇒ 3 + n = 9 ⇒ n = 6
Find the area of the shaded region. Round your answer to the nearest tenth. Help!! Please!!
Answer:
Area in blue = 17.38m²
Step-by-step explanation:
Find from first principles the derivative of cos x
Answer:
Please see the explanation.
Step-by-step explanation:
Let
[tex]f\left(x\right)=cosx[/tex]
By the first principle
[tex]f\:'\left(x\right)=\lim _{h\to 0}\left(\frac{f\left(x+h\right)-f\left(x\right)}{h}\right)[/tex]
[tex]=\lim _{h\to 0}\left(\frac{cos\:\left(x+h\right)-cos\:x}{h}\right)[/tex]
[tex]=\lim _{h\to 0}\left[\frac{cos\:x\:cos\:h-sin\:x\:sin\:h\:-\:cos\:x}{h}\right][/tex]
[tex]=\lim _{h\to 0}\left[\frac{-cos\:x\left(1-cos\:h\right)-sin\:x\:sin\:h\:}{h}\right][/tex]
[tex]=\lim _{h\to 0}\left[\frac{-cos\:x\left(1-cos\:h\right)\:}{h}-\frac{sin\:x\:sin\:h}{h}\right][/tex]
[tex]=-cosx\:\left(\lim \:_{h\to \:0\:}\frac{1-cos\:h}{h}\right)-sin\:x\:\lim \:\:_{h\to \:\:0}\:\left(\frac{sin\:h}{h}\right)[/tex]
[tex]=-cosx\:\left(0\right)-sinx\left(1\right)[/tex]
[tex]=-sin\:x[/tex]
