Answer:
3 milkshakes 3 sundaes
Step-by-step explanation:
First write the equation.
y = total cost
x = cost of sundae
z = cost of milkshake
21=2x+5z
x+z=6 or x = 6-z
substitute in x = 6-z into the first equation
21 = 2(6-z) + 5z
21 = 12 - 2z + 5z
21 = 12 + 3z
subtract 12 from both sides
21 - 12 = 12 - 12 + 3z
9 = 3z
divide both sides by 3
3 = z
so she bought 3 milkshakes.
That means x+z = 6 and z=3 so
x+ 3 = 6, then x=3 as well, so she bought 3 sundaes.
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Answer:
she bought 3 sundaes and 3 milkshakes
Step-by-step explanation:
let's call the amount of milkshakes M.
let's call the amount of sundaes S.
you know that in total, there are 6 children.
so, you can make the following equation:
M + S = 6
if the milkshakes cost 5$ each, then the cost of the milkshakes can be expressed as 5m
if the sundaes cost 2$ each, then the cost of the sundaes can be expressed as 2S
you also know that Mrs. Browning spent 21$ in total.
so, you can make the following equation:
5m + 2S = 21
this is a system of equations.
using the first equation, you know that M = 6 - S
you can substitute M for 6 - S in the second equation
5m + 2s = 21
5(6 - s) + 2s = 21
30 - 5s + 2s = 21
30 - 3s = 21
30 = 21 + 3s
30 - 21 = 3s
9 = 3s
3 = snow that you know how many sundaes there are, you can substitute that into the first equation:
m + s = 6
m + 3 = 6
m = 6 - 3
m = 3Why do people say that black ops 2 is the best? I will give brainlest
Answer:
They say it because the wanna be different from others lol
Please give me brainliest
Step-by-step explanation:
Answer:
people say that black ops 2 is the best because of the replayabilty and its story line not so much zombies tho
Graph f(x) = 4[x] +5.
Answer:
See image for reference
Step-by-step explanation:
Answer:
Its b
Step-by-step explanation:
Help Me PLEASESESESESES!
Answer:
5375 should be it
Step-by-step explanation:
Help it’s 6 grade math
Answer:
the mean is 55.6; if she redid the D and F papers the mean would increase because you would get a higher average than before. Higher scores mean that the number that you add are larger evidently ending up in a larger value
Step-by-step explanation:
if you want to find mean, all you do is add the numbers together and then divide by the total number of values that you added.
so this would be 74+12+61+86+45 and that is 278. Then there is a total of 5 so you divide 278 by 5 which gives you 55.6.
7. What is the smallest angle in the triangle below?
Answer:
Angle a is the smallest
I need help plssssss.....
Ravi purchased 3 DVDs for $19.99 each. Find the total cost for the DVDs including 5% GST and 6% PST.
Answer:
$66.57
Step-by-step explanation:
Cost of one DVD = $19.99
Cost of 3 DVDs = $19.99*3 =$59.97
Rate of GST = 5%
Amount of GST
= 5%* $59.97
= 0.05*59.97
= $2.9985
Rate of PST = 6%
Amount of PST
= 6%* $59.97
= 0.06*59.97
= $3.5982
Total cost of DVDs
= $59.97 + $2.9985 + $3.5982
= $66.5667
= $66.57
Cornelius has 25 nickels, 39 dimes, 22 quarters, and 12 fifty-cent pieces. How
much money does he have?
Answer:
16.65$
Step-by-step explanation:
Answer:
16.65
Step-by-step explanation:
Josh is comparing the volume of a cylinder and steer. The cylinder has a high of 8 inches and radius of 6 inches. This sphere has a radius 6 6 inches. What is the van of the cylinder and spare in terms of pie
Answer:Has a diamanitor of 6). B.)9 pi square units ... What is the volume, to the nearest whole cubic inch, of a cylinder with a height ... Volume of Cylinders, Cones, and Spheres Assig…
Step-by-step explanation:
A store has 300 televisions on order, and 40% are high definition. How many televisions on order are high definition? You may find the bar model useful in completing this problem.
Answer:
120
Step-by-step explanation:
There are 120 high definition televisions are in Order.
What is Percentage?Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.
Here,
Total television = 300
Percentage of High definition television = 40%
Number of total high definition television = 40/100 X 300
= 40 X 3
= 120
Thus, There are 120 high definition televisions are in Order.
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Can somebody please help with this?
A survey of nonprofit organizations showed that online fundraising has increased in the past year. Based on a random sample of 133 nonprofits, the mean one-time gift donation resulting from email outreach in the past year was $85. Assume that the sample standard deviation is $9. Identify the correct 95% confidence interval estimate for the population mean one-time gift donation.
Answer:
The answer is below
Step-by-step explanation:
Given that:
Confidence interval (C) = 95%, mean (μ) = 85, standard deviation (σ) = 9, sample size (n) = 133
α = 1 - C = 1 - 0.95 = 0.05
α/2 = 0.025
The z score of α/2 (0.025) is the same as the z score of 0.475 (0.5 - 0.025) which is equal to 1.96.
The margin of error (E) is given as:
[tex]E=Z_\frac{\alpha}{2}*\frac{\sigma}{\sqrt{n} } \\\\E=1.96*\frac{9}{\sqrt{133} } \\\\E=1.53[/tex]
The confidence interval = (μ ± E) = (85 ± 1.53) = (83.47, 86.53)
The confidence interval is between 83.47 and 86.53.
Josh wants to add a model of a tree house to his model railroad layout how big should the tree be if the actual tree is 315 inches and the scale is 1:90
Answer:
3.5 inches on the scaled model
Step-by-step explanation:
So using the ratio, 1:90 I thought of two ways to solve this
1) Proportion
2) Equation
Using the proportion method
1:90=x:315
Now cross multiply
315=90x
Now solve and you’ll get 3.5
Equation is just
315/90=X?
Just solve and you’ll also get 3.5
Find the distance between the points (2.8) and (54).
Answer:
It's 51.2
Step-by-step explanation:
All u gotta do is subtract 54 - 2.8
Does this set of ordered pairs represent a function? (-1,5)(0,-3)(2,7)(4,0)(7,5)
Answer:
No
Step-by-step explanation:
You cant have 2 y values
Answer:
it is indeed a function
Step-by-step explanation:
sam was charged $1050 in interest on a loan with a 2.5% interest rate. what was the original amount of the loan if he took 5 years to pay it back?
Answer:
$8,400=amount of loan
Step-by-step explanation:
Key:
P=Money borrowed
T=5 years (time passed)
R=0.025 (interest rate)
I=$1050 (interest charged)
Formula: I=P*R*T
Work:
1,050=P*0.025*5
1,050=P*0.125
1,050/0.125=8,400
Check
8,400*0.025*5=1,050
(thank you 7th grade math last year haha)
Which point is located in Quadrant I?
(shown in pic)
Don’t answer if you don’t know, but if get it right i’ll give brainiest! it’s due soon pls help.
Answer:
c
the top right is quadrant l, the top left is quadrant ll, the bottom left is quadrant lll, and the bottom right is quadrant lV
What is the distance between the points (7,5) and (7, -8) on a coordinate plane?
Answer:
It should be 13
Step-by-step explanation:
Answer:
13
Step-by-step explanation:
Since 5 is positive and 8 is negative, then you can just add the two.
5 + 8 = 13
Or use the distance formula:
Distance = [tex]\sqrt{(x_{2} - x_{1}) ^{2} + (y_{2} - y_{1})^{2} }}\\\\\sqrt{(7 -7) ^{2} + (5 - (-8)) ^{2}}\\\\\sqrt{0 + 169} \\\\Approximately 13\\[/tex]
Consider the solution to the linear equation.
5 (x + 6) = 50. 5 x + 30 = 50. 5 x = 20. x = 4.
Which describes the inverse operations used after the distributive property?
addition then division
subtraction then division
multiplication then subtraction
division then addition
the answer is b
Answer:
the answer is b i think
Step-by-step explanation:
12345
The value of a car is $15000 and depreciates at a rate of 8% per year. What is the decay factor?
Answer:
Answer:1,875
Step-by-step explanation:15,000 ÷ 8 = 1,875
Answer: I think it is 1200
Step-by-step explanation: because $15000 of 8% is equal to 1200 because it just is
If ABCD is a rectangle, find the measure of angle ABD.
Answer: 31 degrees
Step-by-step explanation: Angle ABD and BDC are alternate interior angles, meaning that they are congruent. Therefore, the measure of angle ABD is 31 degrees.
The measure of angle ABD is 31°
What are alternate interior angles?Alternate interior angles are formed by a transversal intersecting two parallel lines . They are located between the two parallel lines but on opposite sides of the transversal, creating two pairs (four total angles) of alternate interior angles. Alternate interior angles are congruent, meaning they have equal measure.
Given;
Angle CDB= 31°
Now
Angle ABD= Angle CDB (alternate interior angles)
Angle ABD= 31°
Therefore, angle ABD will be 31°
Learn more about angles;
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Solve for
m
.
−
5
m
=
−
35
m =
Answer: 7
Step-by-step explanation: -35 / -5 = 7
Answer:
The answer is 7. I did the lesson and 7 was the correct answer
Step-by-step explanation:
The heights of green bean starter plants at a nursery are Normally distributed with a mean of 40 centimeters. If a green bean plant that has a z-score of 1.67 has a height of 45 centimeters, then what is the standard deviation of this Normal distribution? Round your answer to the nearest hundredths.
Answer:2.99 on edge
Step-by-step explanation: i got the question wrong just for the answer hope this helps
Answer:
2.99 on edge
Step-by-step explanation:
HELP PLEASE ILL VENMO THE FIRST PERSON WHO ANSWERS
Answer:
y=2p+9 i really hope this helps and you dont have to venmo me anything but i had to hurry because i have a quiz and i have to go. bye. hope this helped
Step-by-step explanation:
a train is running at a speed of hundred kilometre per hour how much distance will it run in 12 minutes
Step-by-step explanation:
In an hour, there are 60 minutes.
100km * (12/60) = 20km.
Hence the train runs 20km in 12 minutes.
find the measure of a line EC
9514 1404 393
Answer:
41
Step-by-step explanation:
The product of segment lengths from the point of intersection to the circle is the same for both chords.
QC·QE = QD·QF
2x(21) = (x+4)(30)
14x = 10(x +4) . . . . . divide by 3
4x = 40 . . . . . . . . . . subtract 10x
x = 10 . . . . . . . . . . . .divide by 4
2x +21 = EC = 2(10) +21 . . . . . find EC
EC = 41
Find the value of c that makes the trinomial a perfect square trinomial.
m^2-14m+c
Answer:
49
Step-by-step explanation:
m^2-14m+c
Take the -14
Divide by 2
-14/2 = -7
Square it
(-7)^2 = 49
Add it to each side
m^2-14m+49
The value of c is 49
Can someone help me.
Answer:
Its green
Step-by-step explanation:
In here wehn they don't say or it means that the line is going to be attached
vary hard 12th grade work
Can you please help do not understand
