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3 years ago

15

find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the ori

ginal number and divided by 2

1 answer:

blagie [28]3 years ago

8 0

Answer:

14

Step-by-step explanation:

First condition

Let the number be x

$\dfrac{x+ 8}{4} = \dfrac{x - 3}{2}$ Cross multiply

2(x + 8) = 4*(x - 3) Remove the brackets

2x + 16 = 4x - 12 Add 12 to both sides

2x + 16 + 12 = 4x - 12 + 12 Simplify

2x + 28 = 4x Subtract 2x from both sides

2x - 2x + 28 = 4x - 2x Simplify

28 = 2x Divide both sides by 2

28/2 = 2x/2

x = 14

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After one round in a card game, your score was -50 points. After the second round, your score was 29 points. How many points did

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Answer:

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Step-by-step explanation:

$score = 29 - (-50)$

Expressed as: The score is <em>the difference</em> between 29 and -50.

Simplify:

$score = 29 + 50$

Result:

$score = 79$

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2 years ago

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3 years ago

Read 2 more answers

Please find the perimeter and area of these shapes

ladessa [460]

Answer:

ABC shaded area = 36 $\pi$ - 72 cm²

ABC shaded area perimeter = $6\pi +12\sqrt{2}$ cm

ABCD area = $\dfrac52 \pi$ cm²

ABCD perimeter = $3\pi +2$ cm

Step-by-step explanation:

<u>Shape ABC</u>

Assuming you want the area and perimeter of the shaded part of the shape only...

<u>Area</u>

Area of a sector = $\dfrac12r^2\theta$ (where r is the radius and $\theta$ <em> </em>

⇒ area of a sector = $\dfrac12 \times 12^2\times \dfrac{\pi}{2} =36\pi \ \textsf{cm}^2$

Area of triangle = 1/2 x base x height

⇒ area of triangle = 1/2 x 12 x 12 = 72 cm²

Therefore, area of shaded area = area of sector - area of triangle

⇒ area = 36 $\pi$ - 72 cm²

<u>Perimeter</u>

Arc length = $r\theta$ (where r is the radius and $\theta$ <em> </em>

⇒ arc length = $12\times\dfrac12\pi =6\pi \ \textsf{cm}$

Hypotenuse of triangle = $\sqrt{a^2+b^2}$ (where a and b are the legs of the right triangle)

⇒ hypotenuse = $\sqrt{12^2+12^2} =12\sqrt{2}$ cm

Therefore, perimeter = arc length + hypotenuse

⇒ perimeter = $6\pi +12\sqrt{2}$ cm

<u>Shape ABCD</u>

<u>Area</u>

Area of a semicircle = $\dfrac12 \pi r^2$ (where r is the radius)

⇒ area of large semicircle ABC = $\dfrac12 \times \pi \times 2^2=2\pi \ \textsf{cm}^2$

⇒ area of small semicircle AD = $\dfrac12 \times \pi \times 1^2=\dfrac12\pi \ \textsf{cm}^2$

⇒ area of shape ABCD = $\dfrac12 \pi + 2 \pi=\dfrac52 \pi \ \textsf{cm}^2$

<u>Perimeter</u>

1/2 circumference = $\pi r$

⇒ perimeter = $2\pi +2+\pi=3 \pi+2 \ \textsf{cm}$

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2 years ago

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MrRa [10]

Answer:

A) f^5

Step-by-step explanation:

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3 years ago