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3 years ago

How would you estimation to evaluate this expression: 10.2 times(2time3.7)plus 8

Mathematics

1 answer:

Mamont248 [21]3 years ago

6 0

Answer:

Step-by-step explanation:

10.2 × (2 × 3.7) + 8

≈ 10 × (2 × 4) + 8

= 10 × 8 + 8

= 80 + 8

= 88

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Solve the equation: 5/6 = 1/3 + D

Sauron [17]

Answer: $\frac{1}{2}$

Explanation:
$\frac{5}{6} = \frac{1}{3} + D$
$\frac{5}{6} - \frac{1}{3} = \frac{1}{3} - \frac{1}{3} + D$
$\frac{5}{6} - \frac{1}{3} = D$
$\frac{5}{6} - 2(\frac{1}{3}) = D$
$\frac{5}{6} - \frac{2}{6} = D$
$\frac{3}{6} = D$ = $\frac{1}{2}$

8 0

3 years ago

If a regular polygon has exterior angles that measure approximately 17.14º each, how many sides does the polygon have?

mr Goodwill [35]

Exterior angles for n sides = 360/n = 17.14, n = 360/17.14 = <span>21 sides</span>

6 0

2 years ago

(2x-3)^2 - (3x-2)^2

lara [203]

Answer:

im Pretty sure x

Step-by-step explanation: Distribute:

=4x2+−12x+9+−9x2+12x+−4

Combine Like Terms:

=4x2+−12x+9+−9x2+12x+−4

=(4x2+−9x2)+(−12x+12x)+(9+−4)

=−5x2+5

Answer: −5x2+5

3 0

3 years ago

What is 30 divided by 75 and show the work plz?

Anna007 [38]

Answer:

All Work is on the Paper.

Step-by-step explanation:

Glad to Help!

7 0

3 years ago

5. When I sine an angle like 60°, it gives me a value like 0.866025403. What does this number represent?

PolarNik [594]

Answer:

See below

Step-by-step explanation:

The number you described is the same as $sin(60^{\circ})=\frac{\sqrt{3}}{2}$ where the sine of an angle is the ratio between a right triangle's opposite side to the angle and the hypotenuse. So, in this case, if we had a right triangle with a height of $\sqrt{3}$ units and a hypotenuse of 2 units, the ratio between the two sides will result in the value you provided. This right triangle in particular would be a 30-60-90 triangle.

In the case of a unit circle, it’s the y-coordinate of the point where a 60° angle in the standard position intersects a unit circle and a right triangle is created from that.

5 0

3 years ago