Answer:
The equation of the cost is C = 50h + 15
Step-by-step explanation:
The form of the linear equation is y = m x + b, where
m is the slope of the line ⇒ rate of changeb is the y-intercept ⇒ constant value∵ A plumber charges 15 per service call
→ That means there is a fixed amount of 15
∵ b is the constant amount
∴ b = 15
∵ It charges 50 per hour
→ That means, the rate of change is 50
∵ m is the rate of change
∴ m = 50
∵ C is the cost for h hours
→ Replace y by C and x by h in the form of the linear equation above
∴ C = m h + b
→ Substitute the values of m and b in the equation
∵ C = 50h + 15
∴ The equation of the cost is C = 50h + 15
Solve this question please
a) distance
b) displacement
c) scalar
d) vector
A robin can fly 10 miles per hour faster than a blue jay. It takes a robin 1 1/2 hours to fly 45 miles.
How many hours will it take a blue jay to fly that same distance?
Answer: [tex]2\dfrac14\text{ hours}[/tex]
Step-by-step explanation:
Given: It takes a robin [tex]1\dfrac12[/tex] hours to fly 45 miles.
[tex]1\dfrac12=\dfrac32[/tex]
Speed of robin= [tex]\dfrac{distance}{time}=\dfrac{45}{\dfrac32}[/tex]
[tex]\dfrac{45}{3}\times2= 15\times2= 30\text{ miles per hour}[/tex]
A robin can fly 10 miles per hour faster than a blue jay. It
Speed of Blue jay = Speed of robin - 10 miles per hour
= 30 miles per hour - 10 miles per hour
= 20 miles per hour
Time taken to cover 45 miles = [tex]\dfrac{45}{20}=\dfrac{9}{4}=2\dfrac14\text{ hours}[/tex]
Hence, it will take [tex]2\dfrac14\text{ hours}[/tex] by a blue jay to fly that same distance.
the 4 angles of heptagon equal and each of other 3 is 20° greater the first 4.Find the angles
Answer:
interior angle of a heptagon = 900 degrees
900 = 4x + (3x + 60)
840 = 7x
840/7 = 120
X = 120
120 X 4 = 480
120 X 3 = 360
480 + 360 + 60 = 900
4 angles = 120 degrees each
3 angles = 140 degrees each
Tamika records the outside temperature at 6:00 a.M. The temperature increases by 2ºF every hour for the next 6 hours. If the temperature continues to increase at the same rate, what will the temperature be at 2:00 p.M.?
The temperature at 2 PM will be x +16°F
What is temperature?Temperature is a phrase used to describe the degree of heat or cold on any scale, including Fahrenheit and Celsius. A thermometer is used to determine temperature. It is calibrated using different temperature scales that historically defined themselves using different reference points and thermometric substances.
The most popular scales are the Celsius scale, also known as "centigrade," with the unit °C, the Fahrenheit scale, with the unit °F, and the Kelvin scale, with the unit K. The latter is primarily used for scientific research and is the primary temperature scale specified by the International System of Units (SI).
Let temperature at 6 AM be x°F
Time difference between 2 PM and 6 AM:
Δt = 14 -6
= 8 hour
increase in temperature after every 1 hour = 2°F
increase in temperature in 8 hour will be:
ΔT = 2 * Δt = 2*8 = 16°F
Temperature at 2 PM will be = x + ΔT
= x +16°F
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Select all the situations for which only zero or positive solutions make sense.
Group of answer choices
Measuring temperature in degrees Celsius at an Arctic outpost each day in January.
The height of a candle as it burns over an hour.
The elevation above sea level of a hiker descending into a canyon.
The number of students remaining in school after 6:00 p.m.
A bank account balance over a year.
The temperature in degrees Fahrenheit of an oven used on a hot summer day.
Answer:
Step-by-step explanation:
On this one you would eliminate the ones that are negative or that go into a negative. Which would be A,C, and E. The rest that are left are zero or positive. B for example is a zero because eventually there will be no candle. D would be the same in some way, the students will eventually leave the school. Finally F, the temperature would be increasing.
Answer - B,D,F
what expression is equivalent to x^2-10x+24
Answer:
(x-6)(x-4)
or
x=-6 , x=4
Step-by-step explanation:
There are 21 boys and 7 girls in your gym class. Your teacher selects 2 students at random to be team leaders for a game. What is the probability that both students are girls?
A: 17/36 c: 1/2
b: 1/16 d:1 /18
Answer:
either b or d
Step-by-step explanation:
help its iready ill give brainiest
Answer:
7(1/2)
Step-by-step explanation:
how will rational numbers help in future
Answer:
They are used to share something among friends , Like if there are four friends and they want to divide a cake equally among themselves , then the quantity of cake that each friend will get will be one-fourth of the cake , That is a rational number 1/4.
Step-by-step explanation:
short answer it won't trust me
PLEASE I NEED HELP URGENTLY
A long-distance phone company charges $4.95 month plus an additional $.10 per minute. a. Define a variable and write a formula to find the total cost per month for long-distance service. b. Use this formula to find the long-distance charges for 120 minutes of calls in one month.
Answer:
4.95+0.10x=120
Step-by-step explanation:
Hope this helps
per
(in meters)
3.23
3.18
3.22
3.19
Answer:
Can you please be more specific what do I convert it to.
Step-by-step explanation:
math problem plz help me
Answer:
Option C.
Ground level = 0 foot
Hole = -3 feet
Dirt pile = 3 feet
Which equation has the slope of -2/7 and contains the point (5,-6)?
Answer:
i would go for B
Step-by-step explanation:
A student earns Php 280.00 for a 5 hour shift on his summer job. The amount
of money he earns varies directly to the number of hours worked. Find the
constant k, and the amount of money he will earn for an 8-hour shift.
Answer:
y=k5, 448 after an 8 hour shift
Step-by-step explanation:
The amount of money he will earn for an 8-hour shift is Php448
Let the amount of money he earns be A
Let the number of hours worked is "h"
If the amount of money he earns varies directly to the number of hours worked is expressed as:
A = kx
k = A/x
GIven that A = Php 280.00, x = 5 hours
k = 280/5
k = 56
If x = 8 hours, the amount of money A = kx
A = 56 * 8
A = Php448
Hence the amount of money he will earn for an 8-hour shift is Php448
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Number 7! The figures are similar, find each missing measure
Answer:
X=2.1 cm
Step-by-step explanation:
24 divided by 6= 4
the bigger triangle is 4 times larger. so you would divide 8.5 by 4 which is 2.1.
Hope this helps!! Also I sorry if I got the answer wrong. I haven't done this type of math in years.
What is the value of x?
What is the measure of
What is the LEAST common denominator for 6 and 8
Answer:
3 4 if u wanna go father 1.5 2
Step-by-step explanation:
Answer:
24 is the lcd for 6 and 8..
Tyler has a baseball bat that weighs 28 ounces. Find this weight in kilograms and in grams. Explain or show your reasoning. (Note: 1 kilogram 35 ounces)
Answer:
Weight in Kilograms = 0.8 Kilograms
Weight in grams = 800 grams
Step-by-step explanation:
Tyler has a baseball bat that weighs 28 ounces.
a) Weight in Kilograms
From the question:
1 kilogram = 35 ounces
Hence:
35 ounces = 1 kilogram
28 ounces = x kilogram
Cross Multiply
35 × x = 28 × 1
x = 28/35
x = 0.8 kilograms
b) Weight in grams
1 kilogram = 1000 grams
0.8 kilogram = x
Cross Multiply
x = 0.8 × 1000 grams
x = 800 grams
Substitution Method
2x+5y=-1
y=3x+10
round to the nearest tenth
9514 1404 393
Answer:
21.4
Step-by-step explanation:
For this problem, you only need to know that the hypotenuse (x) is the longest side of the triangle. The only answer choice longer than 20 is ...
x = 21.4
__
If you want to actually go through the numbers, you know that ...
Cos = Adjacent/Hypotenuse
cos(21°) = 20/x
x = 20/cos(21°)
x ≈ 21.4
Triangle MNO is an equilateral triangle with sides
measuring 16/3 units.
What is the height of the triangle?
Answer:
24
Step-by-step explanation:
I WILL GIVE YOU BRAINLY PLSS
If you multiply both sides of an inequality by a negative number, when should you
reverse the inequality symbol?
A. sometimes
B. always
C. never
D. depends on if the number is a fraction or not
PLSS SHOW YOUR WORK PLSS
Answer:
b
Step-by-step explanation:
if you say 1<2 and multiply both by negative 3 you will have -3 > -6
Answer:
Step-by-step explanation:
When you multiply both sides by a negative value you make the side that is greater have a "bigger" negative number, which actually means it is now less than the other side! This is why you must flip the sign whenever you multiply by a negative number. You can also consider this with a number line.
I hope this helps!
Which of these grids is shaded red and blue in the ratio 1:2?
The number of red cells are 4 and the number of blue cells are 8. Then the correct option is C.
What are ratio and proportion?A ratio is a collection of ordered integers a and b represented as a/b, with b never equaling zero. A proportionate expression is one in which two items are equal.
In the grids, there are 12 square box.
Let R be the red and B be the blue.
R + B = 12 ...1
R / B = 1/2 ...2
By solving equation 1 and 2, we have
R + 2R = 12
3R = 12
R = 4
Then
4 + B = 12
B = 8
Then the correct option is C.
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Jason owns a party suppy store.
He sells balloons for $0.60 each and party hats for $1.50 each.
Jason buys each balloon for $0.10 and each party hat for $0.30.
Which expression represents how much money Jason gains from selling n balloons and h party hats?
A.) 1.70nh
B.) 0.50n + 1.20h
C.) 0.50n - 1.20h
D.) 0.70n + 1.80h
Answer: definitely B
Step-by-step explanation: if you buy the balloons for less than you sell, you must subtract what you pay for from the number you are selling it for, but we don't know how many he sold YET so we have a letter filling it in till we do
The expression 2.4x−3.9y−1.2x+ay is equivalent to 1.2x+1.2y.
What is the value of a?
Enter your answer as a decimal, like this: 42.5
Answer:
a=5.1
Step-by-step explanation:
Isolate the variable by dividing each side by the factors that don't contain the variable. Hope this helps! :)
The value of a, if The expression 2.4x − 3.9y − 1.2x + ay is equivalent to 1.2x + 1.2 y is 5.1.
What is an expression?A finite combination of symbols that are well-formed in accordance with context-dependent principles is referred to as an expression or mathematical expression.
Given:
2.4x−3.9y−1.2x+ay is equivalent to 1.2x+1.2y,
2.4x − 3.9y − 1.2x + ay = 1.2x + 1.2y
Simplify the above expression as shown below,
2.4x − 1.2x + ay - 3.9y = 1.2x + 1.2y
1.2x + y(a - 3.9) = 1.2x + 1.2y
As the expression is equivalent, compare the expression as shown below,
a - 3.9 = 1.2
a = 1.2 + 3.9
a = 5.1
Thus, the value of a is 5.1.
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Need Help ASAP
Please help with this math question i dont understand it very well.
Answer:
-30h +40 - 60 I think.........
Find the area of this parallelogram.
Answer:
147.03 cm
Step-by-step explanation:
Answer:
147.03
Step-by-step explanation:
WxL=147.03
I think this is right ❤️
−6 2/1 −(−2 8/1 )+3 3/2
Answer:
simplify the expression.
Exact Form:
13/2
Decimal Form:
6.5
Mixed Number Form:
6 1/2
Step-by-step explanation:
plz give me brainlyest
Answer: 6 1/2
Step-by-step explanation:
-6 2/1 - (-2 8/1 ) + 3 3/2
-8 - (-10) + 4 1/2
-8 + 10 + 4 1/2
2 + 4 1/2
6 1/2
I didn't really understand some stuff but I think I did this right.. hope this helps!
Find the value of x, use image
Answer:
x = 168
Step-by-step explanation:
A hexagon's total interior angles sums up to be 720, so what you have to do is just subtract.
x = 720-(84+128+150+103+87)
x = 168
Find the distance between the points (5, 2) and (1, -3). Round to the nearest tenth if necessary.
a. 3.0
b. 9.0
c. 5.2
d. 6.4
Answer:
d. 6.4
Step-by-step explanation:
d=√(1−5)2+(−3−2)2
d=√(−4)2+(−5)2
d=√16+25
d=√4–√1
d=6.403124