Time = 270 mins = 4 hr. 30 mins = 4½ hr.
distance = 63 miles
thus, speed = distance travelled / time taken
speed = 63/(4½) miles per hr
speed = 14 miles per hr.
pls mark this as brainliest.
David says,
“72 kilometres per hour is faster than 20 metres per second."
(b) Is David correct?
You must show how you get your answer.
Answer:
no, 72 km/hr is equal to 20m per sec
Step-by-step explanation:
20 m = .02 km
.02 km per hour is equal to .02(3600) per hour, which is 72 km per hour
(you have to multiply my 3600 to get seconds into hours)
A train covers 165 km in 1.5 hours. Do these quantities (distance and rime) vary directly or inversely?
Answer:
directly
Step-by-step explanation:
directly because it is a straight line
Two cars leave towns 760 kilometers apart at the same time and travel toward each other. One car's rate is 12 kilometers per hour less than the other's. If they meet in 4 hours, what is the rate of the slower car
Answer:
89 km/hr
Step-by-step explanation:
Distance = Rate(speed) × Time
D = R × T
T = 4 hours
One car's rate is 12 kilometers per hour less than the other's.
Hence:
First's car's rate = r × 4 = 4r
Second car's distance = (r + 12) × 4 = 4r + 48
4r + 4r + 48 = 760
8r + 48 = 760
8r = 760 - 48
8r = 712
r = 712/8
r = 89 km/hr
The rate of the slower car is 89 km/hr
What is the resulting equation?
For those of you who are good at proofs, please help, I am offering 20 points.
Answer:
statement: segment HA is parallel to seg HD and seg HD is parallel to seg AN.
Reason: given
statement: angle 1 is congurent to angle 3.
reason: alternate interior angles are congruent.
statement: angles 2 and 4 are congruent
reason: alternate interior angles are congruent.
statement: Seg DA is congruent to seg DA
reason: reflexive property
statement: angle AHD is congruent to angle AND
reason: since angles 1 and 3 are congruent, and 2 and 4 are congruent, and HDA is a triangle, same with AND, the last angle must be congruent.
statement: seg HD is congruent to seg NA and HA is cong to ND.
reason: ASA angle side angle theorem states that if 2 angles and a side is congruent to the corresponding parts of another triangle, then it is congruent.
Step-by-step explanation:
please help :((
2 x 2 x 2 x 2
Answer:
16
Step-by-step explanation:
2 x 2 = 4
4 x 2 = 8
8 x 2 = 16
Answer:
8
Step-by-step explanation:
uhhhhhhh filler words
Find the geometric mean of 24 and 45
In the expression 3x - 4y + z, what is the
coefficient of z?
Answer:
1
Step-by-step explanation:
The coefficient is the number in front of a variable. There is a hidden coefficient of 1 in front of z. The reason it is not shown is because any number multiplied by 1 is just that number so showing the 1 is redundant.
The coefficient of z in the expression 3x- 4y +z is 1.
What is expression?A mathematical operation such as subtraction, addition, multiplication, or division is used to combine terms into an expression. In a mathematical expression, the following terms are used:
An absolute numerical number is referred to as a constant.Variable: A symbol without a set value is referred to as a variable.Term: A term can be made up of a single constant, a single variable, or a mix of variables and constants multiplied or divided.Coefficient: In an expression, a coefficient is a number that is multiplied by a variable.Given:
3x - 4y + z
As, we know a coefficient is a number that is multiplied by a variable.
So, the coefficient of x is 3, coefficient of y is 4 and coefficient of z is 1.
Learn more about expression here:
https://brainly.com/question/14083225
#SPJ2
For every 1 litre of water used 150ml of sucrose and 600ml of saline solution is used
Question:
For every 1 litre of water used to make a medicine, 600 ml of sucrose and 150ml of saline solution are used.
Express the amount of water, sucrose and saline solution needed as a ratio in its simplest form.
Answer:
[tex]Water : Sucrose : Saline = 20 : 3 : 12[/tex]
Step-by-step explanation:
Given
[tex]Water = 1L[/tex]
[tex]Sucrose = 150mL[/tex]
[tex]Saline= 600mL[/tex]
Required
Express as a ratio to the simplest form
First convert the volume of water to mL
[tex]Water = 1L[/tex]
[tex]Water = 1 * 1000mL[/tex]
[tex]Water = 1000mL[/tex]
Express as ratio:
[tex]Water : Sucrose : Saline = 1000mL : 150mL : 600mL[/tex]
[tex]Water : Sucrose : Saline = 1000 : 150 : 600[/tex]
Divide through by 10
[tex]Water : Sucrose : Saline = 100 : 15 : 60[/tex]
Divide through by 5
[tex]Water : Sucrose : Saline = 20 : 3 : 12[/tex]
The ratio can not be further simplified
Round 5.955 to the nearest tenth.
Answer:
6.
Step-by-step explanation:
To round 5.955 to the nearest tenth consider the hundredths’ value of 5.955, which is 5 and equal or more than 5. Therefore, the tenths value of 5.955 increases by 1 to 0.
Answer:
6.0
Step-by-step explanation:
really need help like help on math
Answer:
D
Step-by-step explanation:
there are infinite solutions because if the numbers are equal that means that both sides are equal
both sides have x too
therefore x can be any value and the equation will still be true
In a recipe for pizza sauce, the ratio of cans of tomatoes to teaspoons of oregano is 1:6. How many teaspoons of oregano do you need for eight cans of tomatoes?
Answer:
48 teaspoons of Oregano
Step-by-step explanation:
Ratio is given as:
Cans of tomatoes : Teaspoons of Oregano
1 : 6
Hence:
1 can of tomatoes = 6 teaspoons of Oregano
8 can of tomatoes = x teaspoons
Cross Multiply
x = 8 × 6 teaspoons
x = 48 teaspoons of Oregano
How did you do? Rate your work on a scale of 1 to 5, with 5 as the highest score. Then write a brief evaluation of your work below. Note what you learned and what challenged you.
Answer:
i think you have to explain what we did work on...
Step-by-step explanation:
Answer: just say what comes up to your head it works the best
Step-by-step explanation:
(pls help asap)
what is 2x+5x^2-3x-10 + x+1x+2?
SHOW ALL STEPS
Answer:
x - 8 + 5x^2
Step-by-step explanation:
Group like terms
2x - 3x + x + 1x -10 + 2 + 5x^2
-x +2x -8 +5x^2
x - 8 + 5x^2
smart people pleaseeeee help
PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ PLZ
A person pushes a car with a force of 25 N. The car accelerates to a rate of 5 m/s^2. What is the mass of this car?
Simplify the following ( -3m⁴) ( 6m⁶)
A 3m¹⁰
B -18m²
C -18m²⁴
D -18m¹⁰
Answer:
option d
Step-by-step explanation:
(-3m⁴)(6m⁶)
-18m¹⁰
PLEASE HELP!!!!!!!!!!!!
Look at the graph
what is the slope?
simplify your answer and write it as a proper fraction, improper fraction, or integer
Answer:
5
Step-by-step explanation:
Rise over run
Rises 10, runs 2
10/2 =5/1= 5
Answer:
5
Step-by-step explanation:
for every 1 unit on x-axis graph moves 5 units up on y-axis
can someone help me with this I need help
What is the slope of the graph shown below?
Answer:
B: -2
Step-by-step explanation:
Find the slope by counting how many times it would take to reach a point. For example, (0,1). Or use you could use the slope formula by finding two coordinates
146 is 2% of what number? If necessary, round your answer to the nearest hundredth.
0.01
Yes
Answer: 7,300
Step-by-step explanation:
146 = 2%
73 = 1%
7,300 =100%
For the polynomial state a common factor of all monomials and factor it out. 3/2*x^2yz-9/8*xyz+15/4*xy
Answer:
3/2x²yz – 9/8xyz + 15/4xy = 3/2xy[xz – 3/4z + 5/2)
Step-by-step explanation:
Given 3/2x²yz – 9/8xyz + 15/4xy. Let's look for a common factor.
3/2x²yz = 3/2 * x * y * z
9/8xyz = 3/2 * 3/4 * x * y * z
15/4 = 3/2 * 5/2 * x * y
Looking at the above; 3/2, x and y are common to all terms. Therefore the factor is:
3/2xy. Now let's factor it from each term
3/2x²yz = 3/2xy(xz)
9/8xyz = 3/2xy(3/4z)
15/4xy = 3/2xy(5/2), therefore we have:
3/2x²yz – 9/8xyz + 15/4xy = 3/2xy[xz – 3/4z + 5/2).
2x- 6y = - 12x + 2y = 14
Answer:
Step-by-step explanation:
add your x and y together first
A. 45
B. 50
C.39.5
D. 47.5
Please need the answer
kp318517
plsssssss
answer
Answer:
3 gallons
Step-by-step explanation: 1 gallon = 3
2 gallons = 8
3 gallons = 12
Answer:
3
Step-by-step explanation:
Alan and Bree are taking a keyboarding test. The tables show the number of words they type over time, and the numbers of mistakes they make
Mistakes
Alan's Typed
Words
5
10
Time
(seconds)
6
12
2
4
6
18
15
20
8
Mistakes
Bree's Typed
Words
9
Time
(seconds)
8
3
6
18"
16
9
27
36
24
32
12
Who makes mistakes at a faster rate? Explain using ratios.
Select the answers from the drop-down lists to correctly complete the sentences.
Answer:
Bree does
Step-by-step explanation:
Lamont designs a survey of town residents in an attempt to predict who will be elected mayor. He chooses his sample of 500 people from the town’s 40,000 residents by asking his question to every person leaving the public library on a Saturday. Which suggestion would most improve Lamont’s random sample?
i only need number 7 and 9 please help and show work
Answer:
9
1=49
2=131
3=131
Step-by-step explanation:
1=4
2,3=180-49
and you should answer 7 like this
Meg is a veterinarian. She found that 20% of the dogs she saw this week were boxers. Steve is also a veterinarian. He found that 2 or 25% of the dogs he saw this week were boxers. Does each person need to find the part, the whole, or the percent?
(help?)
help fast plss!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
d
Step-by-step explanation:
Tom drive 200 Miles in 4 hours He drives the first 32 miles at an average speed 64 mph Work out the average spoed of journey
Answer:
50mph
Step-by-step explanation:
Step one:
given data
Tom drive 200 Miles in 4 hours
He drives the first 32 miles at an average speed 64 mph
The average speed = total distance/total time take
Average speed= 200/4
Average speed= 50mph