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KengaRu [80]
3 years ago
12

Ali needs to solve the equation x^2 + 6x + 22 = 0 by completing the square. which pair of steps is the most efficient way to beg

in?
a. x^2 + 6x + 9 = -22 + 9

b. x^2 + 6x + 36 = -22 + 36

c. x^2 + 6x + 3 = -22 + 3

d. x^2 + 6x + 81 = -22 + 81
Mathematics
1 answer:
Cloud [144]3 years ago
8 0

Answer:

a. x² + 6x + 9 = -22 + 9

Step-by-step explanation:

they moved the 22 to the right by subtracting it. this leaves a binomial on the left side, which if what you want to solve it.

then they completed the square by dividing b (6) by 2 = 3. then squaring 3 to get 9.

if you added 9 to the left, then you have to add 9 to the right, therefore resulting in -22 + 9.

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33% of what number Is 1.45?
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ANSWER : <em>Approximately 4.39</em>

WHY? : You must round up the answer "x=4.3939". If thought of like .33X=1.45, then you divide 1.45 by .33

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Ganezh [65]
Sorry if im to late but these were the right answers

3 0
4 years ago
Can u please help me and show me how u got that answers.
GREYUIT [131]
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6 0
3 years ago
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The diagram shows a circle inside a semicircle.
rjkz [21]

A circle inside a semicircle is depicted in the diagram. The circle measures 10 cm in diameter. The semicircle has a 20 cm diameter. Calculate the shaded area. Give a precise response to the nearest decimal point.

The area of the shaded region is 39.3cm^{2}.

Given the diagram shows a circle inside a semicircle.

Every point in the plane of a circle, which is a closed, two-dimensional object, is evenly separated from the center. All lines that cross the circle join together to produce the line of reflection symmetry. Every angle also possesses rotational symmetry about its center.

Area of a circle = \pi r^{2}.

Semicircle is when a line travelling through the center of a circle reaches its two ends, a semicircle is created. Thus, a circle can be formed by combining two semicircles.

Area of a semicircle = \frac{1}{2} \pi r^{2}.

The circle has a diameter of 10 cm. The semicircle has a diameter of 20 cm.

Semicircle:

r_{1}=\frac{d_{1} }{2}=\frac{20}{2}=10cm\\S_{1}=\frac{ \pi r_{1}^{2}  }{2}   =\frac{ \pi \times 10^{2}  }{2} =50\pi cm^{2}

Circle:

r_{2}=\frac{d_{2} }{2}=\frac{10}{2}=5cm\\S_{2}=\pi r_{2}^{2}   = \pi \times 5^{2}  =25\pi cm^{2}

So,

S=\frac{S_{1} -S_{2}}{2} \\S=\frac{50\pi -25\pi}{2}\\S=\frac{25\pi}{2} \\S=39.3cm^{2}

Therefore, The area of the shaded region is 39.3cm^{2}.

To learn more about semicircle visit: brainly.com/question/3442660

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8 0
1 year ago
Which expression is equivalent to 3t - 5 + 8t + 3 ?
Serggg [28]

Answer:

11t -2

Step-by-step explanation:

3t - 5 + 8t + 3

Combine like terms

3t +8t- 5  + 3

11t -2

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3 years ago
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