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All Questions
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232979 Questions
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353
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Analytic Geometry
Line m has the equation y = 3x + 5. Line n has the equation y = kx - 7. Lines m and n intersect at the point (-4, -7). What is the value of k?
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Guest
Oct 13, 2021
Oct 12, 2021
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292
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Algebra
Find positive integers (a,b) so that sqrt(37 + 20*sqrt3 + 66) = a + b*sqrt3. Answer in the form of "a, b".
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Guest
Oct 12, 2021
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439
3
+101
if anyone could help out with this that would be great!
If I have 2 more sisters than brothers and each of my sisters also has 2 more sisters than brothers, how many more sisters than brothers does my oldest brother have?
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vxnessa
Oct 12, 2021
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291
1
math problem
The positive five-digit integers that use each of the digits 1, 2, 3, 4 and 5 exactly once are ordered from least to greatest. What is the 60th integer in the list?
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Guest
Oct 12, 2021
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341
3
help with ratio
The ratio of Mario's money to Luigi's money was 9:4 before Mario went to the store. After Mario spent $84 on jackets, the ratio became 1:2. How much money did Mario have at first?
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Guest
Oct 12, 2021
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349
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Multiplicative Inverse vs. Multiplicative Idendity
What is a multiplicative inverse? If you can answer that question, what is a Multiplicative Identity?
I was so mad that I couldn't do this myself for my math class. PLEASE HELP, I'M DESPRATE! Also, I
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Guest
Oct 12, 2021
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306
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+101
could anyone explain how to do this?
When calculating his income tax an accountant realized that his federal tax was 30% of his income after his provincial tax was paid, and that his provincial tax was 20% of his income after his federal tax was paid. If the accountant's income before taxes
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vxnessa
Oct 12, 2021
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338
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help algebra
Two liters of a 30% acid solution are mixed with three liters of a $80\%$ acid solution. What percent of the mixture is acid?
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Guest
Oct 12, 2021
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212
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+4
I need it to be numerical, by the way, thanks!
There are 6 and 2 over 3 pounds of walnuts in a container, which will be divided equally into containers that hold 1 and 1 over 2 pounds. This would fill ____ and 4 over 9 containers.
JKCrz
Oct 12, 2021
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298
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Functions
Let f(x) = 3x - 8 and g(f(x)) = 2x^5 - 5x - 3. Find g(-5).
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Guest
Oct 12, 2021
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203
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Operations
Define a * b as 2a + b^2. If a * 5 = 9, what is the value of a?
Guest
Oct 12, 2021
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445
8
+677
paper squares
Anna, Bea, Clara and Dana have many paper squares of the same size in the colours red, green, blue and white.
a) Each of the girls chooses one of the colours first; each chooses a different one.
Find out how many choices the
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Straight
Oct 12, 2021
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236
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Copper has a specific heat of 0.385 J/(g×C). A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100C to 20
Copper has a specific heat of 0.385 J/(g×°C). A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100°C to 200°C. What is the mass of the piece of copper?
Guest
Oct 12, 2021
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189
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Graphing
Let y = f(x) be the function defined on -1 <= x <= 1 by the formula
This is a graph of y = f(x):
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Guest
Oct 12, 2021
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187
0
Coordinates
The length of the segment between the points (2a, a-4) and (4, -1) is $2\sqrt{19}$ units. What is the product of all possible values for a?
Guest
Oct 12, 2021
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214
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Operations
If $a \clubsuit b = a^2 - 2ab + b^2$ and $2 \clubsuit x = 81$, find the sum of all possible values of x.
Guest
Oct 12, 2021
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238
1
Pls help to find the answer. Thanks
Alan has a box of cookies. 25% of the cookies are chocolate-flavoured. 1/9 of the remaining cookies are butterscotch-flavoured. The other 16 cookies are caramel-flavoured. Find the total number of cookies in the box.
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Guest
Oct 12, 2021
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247
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Geometry
A right triangle with integer leg lengths is called "cool'' if the number of square units in its area is equal to the number of units in the perimeter. What is the sum of all the different possible areas of cool right triangles?
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Guest
Oct 12, 2021
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255
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Decimals
What is the 453rd digit to the right of the decimal point in the decimal expansion of 6/31?
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Guest
Oct 12, 2021
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256
2
SOS
How do you convert 25% into a fraction????
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Guest
Oct 12, 2021
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239
1
help algebra
Enter all solutions to (x-2)^{25*x^2} = 1
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Guest
Oct 12, 2021
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349
0
+677
Start-1!
There are two equations, but at least solve one of them:
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Straight
Oct 12, 2021
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