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3 years ago

Which inverse operation should be performed first?: m = 7 = 32.

Mathematics

1 answer:

Mumz [18]3 years ago

7 0

The answer is multiplication

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Which three steps are correct when solving this quadratic equation by completing the square? X^2-10x=39

sergey [27]

Step-by-step explanation:

Any answer that involes,

Step 1: Complete the Square

${x}^{2} - 10x = 39$

$( \frac{ - 10}{2} ) {}^{2} = 25$

${x}^{2} - 10x + 25 = 64$

Step 2: Turn the left side into a binomial

$(x - 5) {}^{2} = 64$

Step 3: Solve for x.

$x - 5 = + - 8$

$x - 5 = 8$

$x = 13$

$x - 5 = - 8$

$x = - 3$

X=-3 or X=13

4 0

3 years ago

David is making a wall out of bricks. Each brick is 2/3 foot long. There are 20 bricks lined up end to end to make the wall. Wha

Law Incorporation [45]

The total length of wall is 160 inches

Solution:

Given that,

$Length\ of\ each\ brick = \frac{2}{3}\ foot$

1 feet = 12 inches

Therefore,

$Length\ of\ each\ brick = \frac{2}{3} \times 12\ inches = 8\ inches$

There are 20 bricks lined up end to end to make the wall

To find: Total length of wall in inches

$Total\ length\ of\ wall = \text{length of each brick } \times \text{ total number of bricks}$

Thus we get,

$Total\ length\ of\ wall = 8 \times 20\\\\Total\ length\ of\ wall = 160\ inches$

Thus total length of wall is 160 inches

8 0

3 years ago

Pleaseeee helppppppppp meeeeee

Lera25 [3.4K]

Answer:

x = 10 yd

Explanation:

These triangles are based on proportions. 12 yd is proportional to 18 yd, and x yd to 15 yd. We want to find x. We'll use the rule of three to calculate the unknown number.

12/18 = x/15

x = (12 · 15)/18

x = 10 yd (10 yards from the hut to the gold coins)

3 0

3 years ago

Estimate of 2728/124

kati45 [8]

Answer: the real answer is 22 but a way for you to get a good estimate would be too look at the equation as 2730/120 and then you would get 22.75.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

The circumference of a circle is 11pi inches. What is the area, in square inches, of the circle? Express your answer in terms of

Eva8 [605]

$\bf \textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=11\pi \end{cases}\implies 11\pi =2\pi r\implies \cfrac{11\pi }{2\pi }=r\implies \boxed{\cfrac{11}{2}=r} \\\\[-0.35em] ~\dotfill\\\\ \textit{area of a circle}\\\\ A=\pi r^2\qquad \qquad \implies A=\pi \left( \cfrac{11}{2}\right)^2\implies A=\pi \left( \cfrac{11^2}{2^2}\right)\implies A=\cfrac{121\pi }{4}$

4 0

4 years ago