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4 years ago

2 + 7 * 12/6 - 3 ^ 2

Mathematics

2 answers:

stealth61 [152]4 years ago

6 0

Simplify the expression. The answer is:
7

Dafna11 [192]4 years ago

3 0

Using PEMDAS you would do the exponent first

2+7 * 12/6 - 3^2=
2+7 * 12/6 - 9=
2+7 * 2 - 9=
9 * 2 - 9=
18 - 9=
9

Hope this helps!!!

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3 years ago

The living spaces of all homes in a city have a mean of 2300 square feet and a standard deviation of 500 square feet. Let x be t

antoniya [11.8K]

Answer:

the mean and standard deviation is 2300 and 100 respectively

Step-by-step explanation:

Given that

Mean = 2300

Standard deviation = 500

let us assume the x be the mean of living space

And, the sample is of 25 homes

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3 0

3 years ago

4. Solve the equation using the quadratic formula.

Vikentia [17]

Answer:

A. x = -2, x = 1.25

Step-by-step explanation:

Use the quadratic formula

x = $\frac{-b+\sqrt{b^{2}-4ac } }{2a}$

Once in standard form, identify a, b, and c from the original equation and plug them into the quadratic formula.

4x² + 3x - 10 = 0

a = 4

b = 3

c = - 10

x = $\frac{-3+\sqrt{3^{2}-4x4(-10) } }{2x4}$

Simplify

Evaluate the exponent

x = $\frac{-3+\sqrt{9-4x4(-10)} }{2x4}$

Multiply the numbers

x = $\frac{-3+\sqrt{9+160} }{2x4}$

Add the numbers

x = $\frac{-3+\sqrt{169} }{2x4}$

Evaluate the square root

x = $\frac{-3+13}{2x4}$

Multiply the numbers

x = $\frac{-3+13}{8}$

Separate the equations

To solve for the unknown variable, separate into two equations: one with a plus and the other with a minus.

x = $\frac{-3+13}{8}$

x = $\frac{-3-13}{8}$

Solve

Rearrange and isolate the variable to find each solution

x = - 2

x = 1.25

6 0

3 years ago

Read 2 more answers