Archive day

December 27, 2025

76 public questions were asked on this day.

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The total cost (C) of flood damage repair is represented by the equation C=mx+b, where m is the cost per square meter of damage and x is the area of flood damage in square meters. If the cost per square meter is $50, and...
Asked by ocean cureent 1 answer
Many beaches have narrowed over time due to what?(1 point) Responses beach nourishment beach nourishment beach erosion beach erosion terrace farming terrace farming crop rotation crop rotation
Asked by ocean cureent 1 answer
Beach renourishment, also known as beach nourishment or beach replenishment, is a coastal management strategy that involves importing and placing sand or other sediments to restore a beach that has been eroded. Like any...
Asked by ocean cureent 1 answer
How do both jetties and seawalls help manage beach erosion?(1 point) Responses Both use plants to help keep sand on the beach. Both use plants to help keep sand on the beach. Both provide flood protection in the event of...
Asked by ocean cureent 1 answer
Some benefits of a farmer intercropping growing both rubber and tea include which of the following? Choose the best THREE options. (1 point) Responses decreased deforestation decreased deforestation protection of the soi...
Asked by ocean cureent 1 answer
What is the primary goal of sustainable farming?(1 point) Responses developing new crops to grow while still growing traditional varieties developing new crops to grow while still growing traditional varieties meeting cu...
Asked by ocean cureent 1 answer
What conclusion did the researchers from University of California San Diego reach regarding the best type of material to use for beach nourishment?(1 point) Responses Boulders should be placed near the water's edge to pr...
Asked by ocean cureent 1 answer
Flood mitigation techniques used by the federal government include which of the following? Choose the TWO best options. (1 point) Responses encourages building of farms and cities along flood plains encourages building o...
Asked by ocean cureent 1 answer
Which of the following is one effect waves have on shorelines?(1 point) Responses They cause shorelines to move inland. They cause shorelines to move inland. They cause shorelines to extend further into the water. They c...
Asked by ocean cureent 1 answer
Jack walked up a hill at a speed of $(x^2-11x-22)$ miles per hour. Meanwhile, Jill walked a total distance of $(x^2-3x-54)$ miles in $(x+6)$ hours. If Jack and Jill walked at the same speed, what is that speed, in miles...
Asked by Bob 1 answer
Evaluate $531^2 - 2\cdot 531\cdot 530 + 530^2$
Asked by Bob 1 answer
If $(x + y)^2 = 78$ and $xy = 13$, what is $(x - y)^2$?
Asked by Bob 1 answer
Let $r$ and $s$ be the roots of $2x^2 + 5x - 13 = 0.$ Find $r^2 + s^2.$
Asked by Bob 1 answer
Simplify the expression \[\frac{1}{\sqrt{36} - \sqrt{27}} - \frac{1}{\sqrt{27} - \sqrt{18}} + \frac{1}{\sqrt{18} - \sqrt{9}}.\]
Asked by Bob 1 answer
Simplify the expression \[\frac{3}{\sqrt{2}} + \frac{1}{\sqrt{8}} - \frac{6}{\sqrt{32}}.\]
Asked by Bob 1 answer
Let $a$ and $b$ be the roots of $x^2 + 7x - 4 = 0$. Find $(a + 3)(b + 3).$
Asked by Bob 1 answer
One of the five quadratics below has a repeated root. (The other four have distinct roots.) What is the repeated root? \begin{align*} &-x^2 - 18x + 9 \\ &3x^2 - 6x + 12 \\ &8x^2 - 32x - 128 \\ &25x^2 - 30x + 64 \\ &x^2 -...
Asked by Bob 1 answer
Compute \[1234567890^2 - 2\cdot1234567890\cdot 1234567898 + 1234567898^2\]
Asked by Bob 1 answer
Find the largest prime factor of $309^2 - 147^2.$
Asked by Bob 1 answer
When the function f(x)=cosx is reflected across the x-axis, the resulting function is g(x)=−cosx . If the coordinates of the y-intercept of f(x)=cosx are (0,1) , what are the coordinates of the y-intercept of the reflect...
Asked by Mason 1 answer
Which of the following could be found in a table of values for the function g(x)=cos(−1.5x)−1 ?(1 point) Responses (2π3,−2) left parenthesis Start Fraction 2 pi over 3 End Fraction comma negative 2 right parenthesis (2π3...
Asked by Mason 1 answer
What is −cos(45°) ?(1 point)
Asked by Mason 1 answer
Use the image to answer the question. A solid line wave and a dotted line wave are plotted on a coordinate plane. The x-axis ranges from negative 2 pi to 2 pi in increments of pi. The y-axis ranges from negative 4 to 10...
Asked by Mason 1 answer
Question Use the image to answer the question. A waveform is graphed on a coordinate plane. The x-axis ranges from negative 2 pi to 2 pi in increments of Start Fraction pi over 2 End Fraction. The y-axis ranges from nega...
Asked by Mason 1 answer
Use the image to answer the question. A waveform is graphed on a coordinate plane. The x-axis ranges from negative 2 pi to 2 pi in increments of Start Fraction pi over 2 End Fraction. The y-axis ranges from negative 2 to...
Asked by Mason 1 answer