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2 years ago

Which of the following expressions are equivalent to 58 ?

Mathematics

1 answer:

Westkost [7]2 years ago

3 0

Answer:

(5^4)^2

Step-by-step explanation:

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Find the length of AC

mina [271]

The answer is 8 yd.. :)

5 1

3 years ago

Use the quadratic formula to find the solutions to the

nadezda [96]

Answer:

Step-by-step explanation:

The quadratic formula:

$\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

where a is the coefficient of $x^2$ , b being the coefficient of $x$ and c being the constant.

Plug in the values:

$\frac{-\left(-5\right)\pm \sqrt{\left(-5\right)^2-4\cdot \:2\cdot \:5}}{2\cdot \:2}$

$\frac{5\pm\sqrt{-15} }{4}$

Since $\sqrt{-15} =\sqrt{-1} \sqrt{15} =i \sqrt{15}$

The answer is:

$\frac{5\pm i \sqrt{15} }{4}$

6 0

3 years ago

Read 2 more answers

Please help I need to get this correct

ZanzabumX [31]

Answer: i think the answer is 2

Step-by-step explanation:

sorry if im wrong please forgive me

3 0

3 years ago

5. A monument casts a 78 ft. shadow at the same time that a vertical yardstick casts a 4.5 ft. shadow. How high is the monument?

rodikova [14]

Hello,

Using Thalès 's theorem:

Let's h the height of the monument.

$\dfrac{1}{h} =\dfrac{4.5}{78} \\\\h=\dfrac{78}{4.5} =\dfrac{156}{9} \approx{17.3\ (ft)}$

If you don't know what is the Thalès's theorem,

imagine that the similar triangles.

5 0

3 years ago

If x = -1, what is the value of y in the equation?y = 8x3 + 12x2 - 6x - 3

Bezzdna [24]

<h3>Answer: y = 7</h3>

Work Shown:

$y = 8x^3 + 12x^2 - 6x - 3\\\\y = 8(-1)^3 + 12(-1)^2 - 6(-1) - 3\\\\y = 8(-1) + 12(1) - 6(-1) - 3\\\\y = -8 + 12 + 6 - 3\\\\y = 7\\\\$

Explanation:

I replaced every x with -1. Then used the order of operations (PEMDAS) to simplify. Keep in mind that $(-1)^2 = (-1)*(-1) = 1$ and not $(-1)^2 = -1$

4 0

2 years ago

Read 2 more answers