Answer:
C. about 1.78 hours
Step-by-step explanation:
Answer:
1.78 hours
Step-by-step explanation:
If t varies inversely with the speed, the formula for that is t= \frac{k}{r} . If t = 2 and r = 40, then we can solve for k, the constant of variation. Multiply both sides by 40 to get k = 80. Now we need to find the value for t when r = 45. Using the k value we just solved for, we will fill in the equation as t= \frac{80}{45} for a t value of about 1.78 hours
...............................................................................................................................................
Answer: about 1.78 hours
...............................................................................................................................................
t = k/r
2 = k/67
k = 134 (which happens to be the distance)
t = 134/r
t = 134/55
t = 2.436 hours
...............................................................................................................................................
The formula for this is t = k/r, read "t varies inversely as r". If the info they give us is 4 hours and 35 miles per hour, we find that k = 140. Now use that 140 in another equation to solve for t: t = 140/45, and t = 3.1 hours
...............................................................................................................................................
t = k/r\
4 hours and 35 miles per hour,
we find that k = 140.
Now use that 140 in another equation to solve for t:
t = 140/45, and
t = 3.1 hours
Factor 20t + 35
I don't understand how to factor
Answer:
5(4t + 7)
Step-by-step explanation:
1) notice the 20 and 35 are both divisible by 5
2) factorise using 5
5(4t + 7)
Completely simplify the rational expression LaTeX: \frac{7x}{3y} + \frac{12x}{9y}
Answer:
[tex]\frac{11x}{3y}[/tex]
Step-by-step explanation:
[tex]\frac{7x}{3y} + \frac{12x}{9y}[/tex]
To add the two fractions, you need a common denominator. In this case, the lowest common denominator (LCD) is 9y. That's because 9y is divisible by both 3y and 9y.
The first fraction must be changed so that its denominator is 9y. Do this by multiplying both numerator and denominator by 3.
[tex]\frac{7x}{3y}\cdot\frac{3}{3}+\frac{21x}{9y}=\frac{21x}{9y}+\frac{12x}{9y}\\=\frac{21x+12x}{9y}\\=\frac{33x}{9y}[/tex]
Finally, this answer can be simplified ("reduced") by dividing both numerator and denominator by 3, their greatest common factor.
A card is drawn at random from a well-shuffled deck of 52 cards. what is the probability of drawing a face card or a spade?
Answer:
2/5 or 2:5
Step-by-step explanation:
Face Card:
The face cards in a deck are the Jack, Queen, and King. There are 4 of each card (1 in each suit), for a total of 12 face cards.
Spade:
1/4 of all the cards in a deck are spades, so 52/4= 13 spades.
When added, the numerator of the probability is 25, however, because the Jack, Queen, and King of Spades are duplicated, we have to subtract 3.
25-3=22
22/55
when simplified: 2/5
help
What is the domain and range of the exponential graphed below?
A.Domain: All real numbers
Range: y > -4
B.Domain: All real numbers
Range: All real numbers
C.Domain: x > 0
Range: y < -6
D. Domain: All real numbers
Range: y > 0
Answer:
B
Step-by-step explanation:
I just did the test
The range and domain of the function exists on all real values
Domain and Range of functionsDomain of a function is the value of the input of graph for which the function exists.
The range of a function is the value of the output of graph for which the function exists.
The given graph denotes an exponential function showing the arrow pointing infinitely in both directions. Hence the range and domain of the function exists on all real values
Learn more on range and domain here: https://brainly.com/question/2264373
The square pyramid below represents a tent that Wayne is making. The sides of the tent will be covered in blue fabric, and the base of the tent will be covered in brown fabric. Find the surface area that will be covered in each color of fabric. Enter your answer in the boxes
Find the measure of angle G
Help ASAP
Choose the correct discriminant, then
write the type and number of roots that it
indicates in the blank provided.
3x + 6 = -6x2
Answer:
3
Step-by-step explanation:
Order of Operations; PEMDAS
Parentheses
Exponents
Multiplication & Division (Left to Right) (ex: 10x2÷5) You would do whatever comes left for Multiplication or Division.
Addition & Subtraction (Left to Right) (ex: 10-2+5) You would do whatever comes left for Addition & Subtraction.
3x+6 =
(9+6=15)
(6x2=12)
(12-15=3)
HELPPPPZ WORTH 30 POINTS AND BRAINLIEST
Answer:
1. 49000
2. 5680
3. 0.508
4. 860
5. 4.83
6. 0.227
7. 2900
8. 4.873
9. 1.992
10. 0.043
11. 41000
12. 0.58
Dexter has a gift card for $20.00 to an electronics store. He also has a coupon for 25% off his entire purchase, so he will be paying 75% of the total cost. He plans to buy a video game for $10.00 and batteries for $2.00. Select the equation that represents how much money will be left on his gift card after his purchases if x represents his remaining balance.
What is the equation that represents his remaining balance?
Answer:
Step-by-step explanation:
x=20(.75)+2+10 (or 12 if it says that)
Answer:
The linear equation that represent the situation is [tex]x=20-0.75(10+2)[/tex]
The remaining balance on his gift card is $11
Step-by-step explanation:
Let x represent the remaining balance.
We know that the linear equation that represent the situation is equal to[tex]x=20-0.75(10+2)[/tex]
Solve
[tex]x=20-0.75(12)[/tex]
[tex]x=20-9[/tex]
x=$11
BRO PLEASE HELP I NEED THIS STUFF IN AN HOUR PLEASE...
Answer:
They Have The Same Y-Intercept.
Function 2's y-intercept is -5.
Function 1 y-intercept could be found by inputting 0 as r.
p=0-5
p=-5
Meaning, they're equal.
line segment CD has coordinates C(-1,9) and D(-7,1). If line segment EF is parallel to line segment CD, what is the slope of line segment EF?
Answer: Slope of segment EF is -4/3
Answer:
The answer is -3/4
Step-by-step explanation:
:)
Find the missing term in this
geometric sequence:
13, [?], 208
#2
Please helppp
Extra 100 points
Answer:
Step-by-step explanation:
C looks good
Maths: A motorist covers 3km in 4minutes.what is his average speed in ms-1?
Answer:
0.75m/s
Step-by-step explanation:
speed = d/t
Determine the function that models the median home price, f (n), in thousands of dollars, n years since
2010.
f(n) =
I need help
.........:...:..:............
helppppppppppppppppppppppppppppppp
Answer:
b
Step-by-step explanation:
When two parallel lines are cut by a transversal, _______________________ angles are supplementary
A.Corresponding angles
B. Alternate interior angles
C, Alternate exterior angles
D.Same side interor angles
Answer:
When two parallel lines are cut by a transversal, Alternate interior angles are supplementary.
Step-by-step explanation:
Prove or disprove the figure defined by points A, B, C, d is a rhombus
Answer:
It is not a rhombus, because all the internal angles are equal.
Step-by-step explanation:
A rhombus is a figure that has four sides of equal length, and 2 internal angles that are smaller than the other two internal angles.
First, let's look at figure ABCD.
We can see that all the sides have equal length by just counting the number of squares that each side takes (each side is 12 units long)
So now we need to see the angles.
Remember that if two lines are perpendicular, then the angle formed by those two lines is exactly 90°.
We can see that the segment BC is horizontal (the y-value of B is the same than the y-value of C)
While the segment CD is vertical (the x-value of C is the same than the x-vale of D)
Then one segment is horizontal, and the other is vertical, which means that the segments are perpendicular, thus the angle C is 90°.
Now we can do the same for segments CD and DA
We already know that CD is a vertical segment.
For segment DA we can see that the y-value of D is the same as the y-value of A, then this segment is horizontal, this means that segments CD and DA are perpendiculars, which means that D = 90°.
Because DA is parallel to BC, and CD is parallel to BA, we can conclude that:
A = 90°
B = 90°
Then all the angles are equal, so this is not a rhombus. (it is a square)
does anyone know how to do any of this??????????
Answer:
is that math or something calculation?
simplify using laws of exponents. Write your asnwer using positive exponents
Answer: look at image below. it shows you the steps
Step-by-step explanation:
Hope this helped :)
Can someone help me with this question ASAP
Answer:
D
Step-by-step explanation:
Answer:
the answer is: parallelograms are quadilaterals
Can you please help me
Answer:
I would say that D is the correct one
giving brainliest
please help
Answer:
17 pt
Step-by-step explanation:
Cause 8 quarts= 16 pt and i added 1 pint to it so its 17 pints
Remember 1 quart = 1 pint
Have a good day!
Making a _________________________ is a one way to compose two functions.
Answer: making a composition is a one way to compose functions
Step-by-step explanation:
Jordan bikes at a speed of 8 2/3 mph. How many miles will he bike in: 3 hours
Answer:
26 miles
Step-by-step explanation:
8 2/3 × 3 =26miles
hope this helps
Answer:
24 and 2/3
Step-by-step explanation:
If 3(2x) - 4(3x) + 3 = 0. Find the possible values of x
pls help
Answer: x=1/2=0.5
Step-by-step explanation:
Given
3(2x) - 4(3x) + 3= 0
Expand parenthesis
6x - 12x + 3 = 0
Combine like terms
-6x + 3 = 0
Subtract 3 on both sides
-6x + 3 - 3 = 0 - 3
-6x = -3
Divide -6 on both sides
-6x / -6 = -3 / -6
x = 1/2 = 0.5
Hope this helps!! :)
Please let me know if you have any questions
Find the area of each parallelogram or triangle
Answer:
Step-by-step explanation:
Data Set [ 146, 161, 114, 178, 150, 134, 172, 131, 128]. Find the Range
Answer:
64
Step-by-step explanation:
Organize the #s from small to big.
When trying to find range you take the MAX # - MIN #
The MAX # = 178
The MIN # = 114
178 - 114 = 64
A used-car salesperson purchased
a car for $4000 and sold it for 40%
more. What was the selling price of
the car?
Answer:
5,600 dollars he sold it for
Step-by-step explanation:
Basically if you cross multiply, you'll do 4,000 times 40. Then divide what you get from multiplying by 100, so do 160,000 divided by 100 in this case. Then when you get that 1,600, it isn't the final step. Lastly, you'll have to add 1,600 on to 4,000 to get the markup selling price. :)
HELP ILL GIVE BRAINLIEST PLEASE I NEED TO PASS MY TEST
What kind of reflection do you need
to perform to reflect a point from
the first quadrant to the second
quadrant?
Reflection across Y axis