4 years ago

True or false? I believe it's false

Mathematics

1 answer:

seropon [69]4 years ago

3 0

That is false. The parabola opens to the right.

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The graph shows the scores of an exam. About what percent of students scored above 86%?

Gemiola [76]

Attach shows the scores of students in an exam

$\begin{gathered} \text{(students scored above 86\%) = }\frac{\text{ number of students score above 86\%}}{\text{Total scored }}\text{ x }\frac{100}{1} \\ \text{(students scored above 86\%) = }\frac{\text{8+5.9+2.2+2}}{1.4+2.2+4.5+6.2+8.5+16.5+18+16.3+8+8+5.9+2.2+2}X\frac{100}{1} \\ \\ \text{(students scored above 86\%) = }\frac{18.1}{99.7}\text{ X }\frac{100}{1} \\ \text{(students scored above 86\%) = }18.15\text{ \%} \\ \text{(students scored above 86\%) = 18\%} \end{gathered}$

Hence the correct answer = 18% Option A

8 0

1 year ago

3(2x + 12) = -2(x - 4) + x

mart [117]

Answer:

-4

Step-by-step explanation:

1. Use the distributive property to get 6x + 36 = -2x + 8 + x

2. Combine like terms 6x + 36 = -x + 8

3. Subtract 36 on both sides. 7x + 36 = 8 > 7x = -28

4. Divide by 7