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2 years ago

Evaluate the expression 34 ÷ (14 − 5) × 2. (4 points)

Mathematics

2 answers:

GalinKa [24]2 years ago

8 0

7.55 would be your answer

VladimirAG [237]2 years ago

6 0

Answer:

4.5

Step-by-step explanation:

This will be an easy explanation, but it will take time.

3 to the fourth power ÷ (14-5) x 2
3 to the fourth power ÷ 9 x 2
81 ÷ 9 x 2
81 ÷ 18 = 4.5

____________________________________________________________

Remember to use the PEMDAS operation.

P- Paran.

E- Expo.

M- Multi.

D- Dib.

A- Add

S- Sub.

__________________________________________________________

If it wants a numerical expression, round to the nearest whole number.

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EXPLAIN THE ERROR Cody was given two points (1/2,4) and (2/3,1), on a line and asked to create a linear equation in standard for

inessss [21]

Answer:

Cody made a mistake when calculating the slope of the line and this affected every other steps after than.

She divided -3 by 6 instead of -3 by 1/6

Step-by-step explanation:

Given

$(x_1,y_1) = (\frac{1}{2},4)$

$(x_2,y_2) = (\frac{2}{3},1)$

<em>See attached for steps</em>

Required

Explain Cody's error

<em>Cody made a mistake when calculating the slope of the line and this affected every other steps after than.</em>

See Proof

Slope (m) is calculated as thus:

$m =\frac{y_2 - y_1}{x_2 - x_1}$

$m =\frac{1 - 4}{\frac{2}{3} - \frac{1}{2}}$

$m =-\frac{ 3}{\frac{1}{6}}$

$m = -3/\frac{1}{6}$

$m = -3 * 6$

$m = -18$

This is in contrast to $m = -\frac{1}{2}$ , calculated by Cody

Solving further to determine the equation.

$y - y_1 = m(x - x_1)$

Where

$(x_1,y_1) = (\frac{1}{2},4)$

$m = -18$

$y - 4 = -18(x - \frac{1}{2})$

$y - 4 = -18x + 9$

Collect Like Terms

$y + 18x = 9 + 4$

$y + 18x = 13$

6 0

2 years ago