Answer:
Two times at (-1,0) and (2.5,0)
Step-by-step explanation:
When the graph intersects or touches x-axis, y is equal to 0
so y = -2x^2 + 3x + 5
=> 0 = -2x^2 + 3x + 5
The formula to solve a quadratic equation of the form ax^2 + bx + c = 0 is equal to x = [-b +/-√(b^2 - 4ac)]/2a
so a = -2
b = 3
c = 5
substitute in the formula
x = [-3 +/- √(3^2 - 4x-2x5)]/2(-2)
x = [-3 +/- √(9 + 40)]/(-4)
x = [-3 +/- 7]/(-4)
x1 = (-3 + 7)/(-4) = 4/-4 = -1
x2 = (-3 - 7)/(-4) = -10/-4 = 5/2 = 2.5
so the graph has two x-intercepts (-1,0) and (2.5,0), therefore it intersects x-axis two times
The statements that apply to the ratio of rice and water are:
- The ratio of rice to water is 1 to 2.5
- The ratio of water to rice is 2.5 to 1
<h3>Ratios</h3>
Ratios are used to compare quantities of different measurements
The entries on the table are given as:
<u>Rice Water</u>
2 5
3 7.5
5 12.5
8 20
<h3>The ratios of both quantities</h3>
The ratio (r) of rice and water is then calculated as:
Pick any corresponding table entry.
So, we have:
Divide
This means that, the ratio of rice to water is 1 to 2.5, and the ratio of water to rice is 2.5 to 1
Read more about ratios at:
brainly.com/question/1781657
Answer:
yes
Step-by-step explanation:
this is a function as there are no negative exponents/fractions as exponents/division in the function....this is in fact a binomial hope this helps!
If I'm understanding the question right then 10.5^2
Answer: He bought 46.875 pounds of rice for the week.
Step-by-step explanation:
Total rice he bought = (Number of dishes made in a week) x (portion of rice in each dish)
GIven: Each portion has 5 ounces of rice.
i.e. each portion has pounds of rice. [ 1 pound = 16 ounces]
Total rice he bought ( in pounds)=
Hence, he bought 46.875 pounds of rice for the week.