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2 years ago

Describe how to determine whether the parabola y = 3x2 + 3x + 6 is opening upward.

Mathematics

1 answer:

qaws [65]2 years ago

4 0

Answer:

Opening upward

Step-by-step explanation:

Standard equation of parabola is:

y = ax² + bx + c

The parabola is opening upward if a > 0 and opening downward if a < 0

The given parabola has a = 3 > 0, therefore it is opening upward

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Which one is right. I am lost and I need help

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3 years ago

If Log 4 (x) = 12, then log 2 (x / 4) is equal to A. 11 B. 48 C. -12 D. 22

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3 years ago

A sector of a circle makes a 127° angle at its centre. If the arc of the sector has length 36 mm, find

Veseljchak [2.6K]

Answer:

Approximately $68.5\; \rm mm$ .

Step-by-step explanation:

Convert the angle of this sector to radians:

$\begin{aligned}\theta &= 127^{\circ} \\ &= 127^{\circ} \times \frac{2\pi}{360^{\circ}} \\ &\approx 2.22\end{aligned}$ .

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In this question, it is given that the arc length of this sector is $s = 36\; \rm mm$ . It was found that $\theta = 2.22$ radians. Rearrange the equation $s = r\, \theta$ to find the radius $r$ of this sector:

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The perimeter of this sector would be:

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2 years ago

7(6+d)=49 Solve for d. A:d=7 B:d=-1 C:d=-7 D:d=1

Elan Coil [88]

Answer: d = 1

Step-by-step explanation:

First distribute the 7 to each term of (6 + d) = 42 + 7d = 49 now subtract 42 from both sides which = 7d = 7. Divide by 7 = 7d/7 = 7/7 = d = 1

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3 years ago

Find all real solutions of this equation to answer

Lera25 [3.4K]

Answer:

(6-2x)(3-2x)x=40

Step-by-step explanation:

(-2x-2x) (6+3)x=40

8x=40

8x/8=40/8

x=5

6 0

3 years ago

Read 2 more answers