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2 years ago

Half of a number plus 12 is 46

Mathematics

2 answers:

VLD [36.1K]2 years ago

6 0

46 = 12 + (.5x)

the number is 68

68/2 = 34 +12 = 46

asambeis [7]2 years ago

4 0

Let the number = x
x/2 + 12 = 46
x/2 = 46 - 12
x/2 = 34
x = 34 * 2
x = 68

So, your final answer is 68

Hope this helps!

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Evaluate the exponent expression 3x–4 ⋅ xy2 for x = –1 and y = 2.

ddd [48]

Answer:

Step-by-step explanation:

Given,

x = - 1

y = 2

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Substitute the given values of x and y in the expression 3x - 4 ⋅ xy².

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8 0

2 years ago

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Step-by-step explanation:

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2 years ago

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2 years ago

Estimate the area of Alberta in square miles. Show your reasoning

ella [17]

Answer: About $278,250\ mi^2$

Step-by-step explanation:

The missing figure is attached.

Notice in the first picture that Alberta has a complex shape.

You can calculate the area of a complex shape by decomposing it into polygons whose areas can be calculated easily.

Observe the second picture. Notice that it can be descompose into two polygons: A trapezoid and a rectangle.

The area of the trapezoid can be calcualted with the formula:

$A_t=\frac{h}{2}(B+b)$

Where "h" is the height, "B" is the long base and "b" is short base.

And the area of the rectangle can be found with the formula:

$A_r=lw$

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Then, the apprximate area of Alberta is:

$A=\frac{h}{2}(B+b)+lw$

Substituting vallues, you get:

$A=(\frac{(410\ mi-180\ mi)}{2})(760\ mi+470\ mi)+(180\ mi)(760\ im)\\\\A=141,450\ mi^2+136,800\ mi^2\\\\A=278,250\ mi^2$

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2 years ago

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Marysya12 [62]

Answer:

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3 0

2 years ago

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