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Post New Question
All Questions
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234931 Questions
0
347
1
Piecewise Function
Let f be defined by
f(x) = 2 - x if x <= 1
f(x) = 2x - x^2 if x > 1
Calculate f(-3) + f(0) + f(3).
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Guest
Sep 29, 2021
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360
1
help math
Find the last two digits of the following sum: 5! + 6! + 7! + 8! + 9! + 10! + ... + 100!
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Guest
Sep 29, 2021
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371
1
Geometry problem
In the diagram below, AM = BM = CM and angle BMC + angle A = 201 degrees. Find angle B in degrees.
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Guest
Sep 29, 2021
0
449
1
1. In triangle ABC we have AB=6 BC=12 AC=7 find cos angle A
1. In triangle ABC we have AB=6 BC=12 AC=7 find cos angle A
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Guest
Sep 29, 2021
0
358
1
Algebra
Bottle X contains 10% acid and bottle Y contains 20% acid. In what ratio, of the quantity of bottle X to the quantity of bottle Y, do I need to mix the liquid from the two bottles if I want to create a mixture that is 16% acid?
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Guest
Sep 29, 2021
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393
1
Prime and composite basics
Jon teaches a fourth grade class at an elementary school where class sizes are always at least 20 students and at most 28. One day Jon decides that he wants to arrange the students in their desks in a rectangular grid with no gaps. Unfortunately for Jon
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Guest
Sep 29, 2021
0
350
1
geometry
In the diagram below, line BC and line DE are parallel. Find y
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Guest
Sep 29, 2021
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455
1
divisiblity
For how many different digits is n the three-digit number 14n divisible by n ?
Note: 14n refers to a three-digit number with the unit digit of n not the product of 14n and n
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Guest
Sep 29, 2021
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349
1
fraction multiplication
Compute$$\left(\frac13 \right)^{-3} - \left(-\frac13 \right)^{-3}.$$
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Guest
Sep 29, 2021
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361
1
Geometry
The field shown has been planted uniformly with wheat. At harvest, the wheat at any point in the field is brought to the nearest point on the field's perimeter. What is the fraction of the crop that is brought to the longest side?
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Guest
Sep 29, 2021
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312
1
Coordinates
What is the y-coordinate of the y-intercept of the line that passes through the point (2,-3) and has slope 2?
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Guest
Sep 29, 2021
0
358
1
Probability
William is taking the 25-question, multiple choice American Mathematics Competition. Each question has five answer choices. William guesses random answers for the last four questions. What is the probability that he will get at least two of these final
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Guest
Sep 29, 2021
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357
2
Geometry
An equilateral triangle has an altitude length of 27 feet. Determine the area of the triangle.
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Guest
Sep 29, 2021
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291
1
help plz
Camy made a list of every possible distinct five-digit positive integer that can be formed using each of the digits 1, 3, 4, 5 and 6 exactly once in each integer. What is the sum of the integers on Camy's list?
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Guest
Sep 29, 2021
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213
0
help math
Find the number of ordered triples (a,b,c) of integers such that 0 <= a, b, c <= 5 and
\[a + b + c = 12.\]
Guest
Sep 29, 2021
0
343
1
Probability
Kendra has 5 red marbles, 4 blue marbles, and 3 white marbles. What is the probability that she draws a red marble and then a blue marble without replacing the first marble? *
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Guest
Sep 29, 2021
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352
1
Need answer quick pls
1/5 of Heidi's savings was equal to 3/7 of Joseph's savings. After Heidi spent $356 and Joseph saved an additional $428; they had an equal amount of money in their savings. How much did Heidi and Joseph save altogether in the end?
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Guest
Sep 29, 2021
0
344
1
Algebra
The height of a golfball hit off a 128-foot hill is modeled by the function h(t) = -16*t^2 + 32t + 128,where his height in feet and t is time in seconds. Find the time the golfball takes to reach the ground
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Guest
Sep 29, 2021
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202
0
Algebra
If a+b=7 and a^3+b^3=42 + ab, what is the value of the sum 1/a + 1/b? Express your answer as a common fraction.
Guest
Sep 29, 2021
0
353
1
Percent
After my salary was increased by 16%, it was $58,000. What was my salary before the increase?
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Guest
Sep 29, 2021
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207
0
Function
Let
f(x) = 2x + 7 if x < -2
f(x) = 2x - 13 if x >= -2
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Guest
Sep 29, 2021
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341
1
System
Solve the following system of equations for all three variables
6x + 8y - 3z = -10
2x + 8y - 5z = 2
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Guest
Sep 29, 2021
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328
1
Math but help
There were 6075 adults and children at a stadium. The ratio of the number of girls to the number of boys was 8:7. The number of adults was 4755 more than the number of boys and 4695 more than the number of girls. How many children were there altogether?
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Guest
Sep 29, 2021
0
362
2
Help pls.
Karen spent 1/4 of her money on 2 fish burgers and 6 chicken wings for a party. The cost of each fish burger was three times the cost of each chicken wing. She bought some more fish burgers with 2/3 of her remaining money. How many fish burgers did she
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Guest
Sep 29, 2021
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370
2
Need explanation and why each steps is done. Thank you!
There are 5 big jars of sugar and 2 small jars of sugar in a kitchen. There is
a total of 8.35 kg of sugar in the jars. 2 big jars contain 0.3 kg more sugar
than 3 small jars. How much sugar is there in all the big jars?
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Guest
Sep 29, 2021
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