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All Questions
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234934 Questions
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349
1
Algebra
A transit train from Boston to New York and a passenger train from New York to Boston both departed at 3:00. The distance between the New York station and the Boston station is 280 miles. The speed of the transit train was 80 miles per hour. The speed of
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Guest
Sep 27, 2021
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222
0
help plz
My trip to work is 120 miles. If I go 8 mph faster than my usual speed, I'll get to work 20 minutes earlier. How long does my trip take, in hours, if I go my usual speed?
Guest
Sep 27, 2021
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364
1
Logarithm
Find the base b so that log_b (81)= 1/3.
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Guest
Sep 27, 2021
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388
2
\[f(x) = \left\{ \begin{array}{cl} 2x + 7 & \text{if } x < -2, \\ -x^2 - x + 1 & \text{if } x \ge -2. \end{array} \right.\]
Let\[f(x) = \left\{ \begin{array}{cl} 2x + 7 & \text{if } x < -2, \\ -x^2 - x + 1 & \text{if } x \ge -2. \end{array} \right.\]Find the sum of all values of $x$ such that $f(x) = -5.$
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Guest
Sep 27, 2021
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352
2
Help. O.O
5/8 of the beads in the box were red. The rest were blue beads and green beads in the ratio 3:4. There were 138 fewer green beads than red beads. How many beads were in the box in all?
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Guest
Sep 27, 2021
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201
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Polynomial
Find the sum of the coefficients in the polynomial 3(3x^{7} + 8x^4 - 7) - 7(x^5 - 7x^2 + 5) + 6(x^3 + x^2) when it is fully simplified.
Guest
Sep 27, 2021
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357
1
Help pls
https://web2.0calc.com/questions/please-help_38557
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Guest
Sep 27, 2021
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341
1
plz help
Find the intersection of the lines 9x-4y=30 and 7x+y=-11. Express your answer as an ordered pair (x,y).
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Guest
Sep 27, 2021
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444
1
Help
In the diagram below, we have $XY = 2\cdot AX = 2\cdot YB$ and $\dfrac{AZ}{ZC} = \dfrac{2}{3}$. Find $\dfrac{[YBC]}{[ZYC]}$. [asy] pair A, X, Y, B, Z, C; A = (0,0); X = (0.3,-0.2); Z = (0.4,0.2); Y = 3*X; B = 4*X; C = 2.5*Z; draw(X--Z--Y--C--B--A--C);
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Guest
Sep 27, 2021
Sep 26, 2021
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382
1
Number Theory
How many five-digit numbers of the form 32x5y are divisible by 34?
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Guest
Sep 26, 2021
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443
1
For how many values of theta such that -8pi ≤ theta ≤ 8pi is sin(theta) = 0.12345?
For how many values of theta such that -8pi ≤ theta ≤ 8pi is sin(theta) = 0.12345?
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Guest
Sep 26, 2021
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222
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help with coordinate
A line through the points( 2, -9) and (j, 7) is parallel to the line 2x +8y = 21 . What is the value of j ?
Guest
Sep 26, 2021
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258
1
PLSSSSS HELP
Find the value of B - A if the graph of Ax + By = 3 passes through the point (-7,2), and is parallel to the graph of x + 3y = -5.
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Guest
Sep 26, 2021
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338
1
Numbers
A three digit number "abc" has the property that the product of a and b is equal to c. The digits a, b, and c are distinct. What is the greatest possible value of the three digit number?
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Guest
Sep 26, 2021
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356
1
An SUV costs $27,155 and costs an average of $0.18 per mile to maintain. A hybrid model of the SUV costs $33,715 and costs an average of
An SUV costs $27,155 and costs an average of $0.18 per mile to maintain. A hybrid model of the SUV costs $33,715 and costs an average of $0.13 per mile to maintain. After how many miles will the cost of the gas-only SUV exceed the cost
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Guest
Sep 26, 2021
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391
1
A truck travels for 4 hours at an average speed of 47 miles per hour. How much longer must the truck travel at an average speed of 61 miles
A truck travels for 4 hours at an average speed of 47 miles per hour. How much longer must the truck travel at an average speed of 61 miles per hour so that the average speed for the total trip will be 50 miles per hour? (Round your
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Guest
Sep 26, 2021
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392
1
An airplane flying into a headwind travels 2600 miles in 6 hours and 15 minutes. On the return flight, the same distance is traveled
An airplane flying into a headwind travels 2600 miles in 6 hours and 15 minutes. On the return flight, the same distance is traveled in 4 hours. Find the speed of the plane in still air and the speed of the wind,
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Guest
Sep 26, 2021
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252
1
Number Theory
If n = 2 (mod 7), find the remainder when (n + 2)(n + 4) is divided by 7.
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Guest
Sep 26, 2021
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310
1
Exponents
What is the value of n if 2^10 * 4^20 * 8^40 = 2^n?
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Guest
Sep 26, 2021
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328
3
HELP PLZ!
Let $ABC$ be any triangle. Equilateral triangles $BCX$, $ACY$, and $BAZ$ are constructed such that none of these triangles overlaps triangle $ABC$. The perimeter of hexagon $AZBXCY$ is $78$. What is the perimeter of $\triangle ABC?$ [asy] pair A,B,C,X,Y,Z;
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Guest
Sep 26, 2021
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358
2
Quadratic
Find the vertex of the graph of the equation y=-2x^2+18x-15.
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Guest
Sep 26, 2021
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354
1
How to simplify
Calculate sqrt(60x)*sqrt(12x)*sqrt(63x)*sqrt(42x). Express your answer in simplest radical form in terms of x. Note: When entering a square root with more than one character, you must use parentheses or brackets. For example, you should enter sqrt(14) as
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Guest
Sep 26, 2021
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327
1
Quadratic
If we express 2x^2 + 6x + 11 in the form a(x - h)^2 + k, then what is h?
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Guest
Sep 26, 2021
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229
0
Counting problem
Cory has 3 apples, 2 oranges, 2 bananas, and 4 strawberries. If Cory eats one piece of his fruit per day and the pieces of fruit within each category are indistinguishable, in how many orders can Cory eat the fruit?
Guest
Sep 26, 2021
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