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2 years ago

What value of r makes the following equation true

Mathematics

2 answers:

Montano1993 [528]2 years ago

8 0

Answer:

Step-by-step explanation:

8 = -3(2) + 7(2)

8 = (-6) + (14)

8 = 8

NNADVOKAT [17]2 years ago

4 0

Answer:

$8 = - 3r + 7r \\ 8 = 4r \\ r = \frac{8}{4} = 2 \\ r = 2 \\ thank \: you$

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Find the area of the shaded region. Round the the nearest tenth.

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Answer:

226.084 sq.m.

Step-by-step explanation:

Radius of circle = 18.6 cm

Area of sector = $\frac{\theta}{360^{\circ} }\pi r^2$

Area of sector = $\frac{123}{360} \times 3.14 \times (18.6)^2$

Area of sector = $371.157 m^2$

Area of triangle = $\frac{1}{2} \times a \times b \times Sin x$

a = OA = radius = 18.6 cm

b = OB = radius = 18.6 cm

x =123 °

Substitute the values in the formula

Area of triangle = $\frac{1}{2} \times 18.6 \times 18.6 \times Sin 123$

Area of triangle = $145.073 m^2$

So, Area of shaded region = Area of sector - Area of triangle

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postnew [5]

Answer:

n = 13

Step-by-step explanation:

1/5(n + 3) + 4 = 3/10(2n - 2)

~Simplify both sides

1/5n + 3/5 + 4 = 3/5n - 3/5

~Combine like terms

1/5n + 23/5 = 3/5n - 3/5

~Subtract 23/5 to both sides

1/5n = 3/5n - 26/5

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3 years ago

What value of r makes the following equation true​

What value of r makes the following equation true