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SSSSS [86.1K]
3 years ago
13

I just need help with B. Please help me. I will mark Beainliest.

Mathematics
2 answers:
IRISSAK [1]3 years ago
6 0
Here we have to find the length of arc AB.

Length of an arc = ( central angle/360)×2 πr

= ( 64.6 / 360 ) × 2 × 5 miles × 22 / 7

= 0.179 × 220 miles / 7

= 39.38 miles / 7

= 5.625 miles.

The required answer is 5.625 miles.
kari74 [83]3 years ago
5 0
Remark
The circumference of a complete circle = 2*pi*r
A part of the circumference = k * 2* pi * r / 360 where k is the measure of any central angle.

Givens
k = 64.6 degrees
r = 5 miles

Formula
Walking distance = k/360 * 2 * pi * r

Sub and Solve
Walking Distance = (64.6/360) * 2 * 3.14 * 5
Walking distance = 5.6346 miles
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bezimeni [28]

Answer:

m = -3

b = 9

y = -3x + 9

Step-by-step explanation:

Let us solve the question

∵ The line passes through points (4, -3) and (3, 0)

∵ The rule of the slope is m = \frac{y2-y1}{x2-x1}

∵ (x1, y1) and (x2, y2) are 2 points on the line

∴ x1 = 4 and y1 = -3

∴ x2 = 3 and y2 = 0

→ Substitute them in the rule of the slope to find it

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→ Substitute the value of m in the form of the equation.

∴ y = -3x + b

→ To find b substitute x and y by the coordinates of the point (3, 0) or (4, -3)

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→ Substitute the value of b in the equation

∵ y = -3x + 9

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2 years ago
You need a 70% alcohol solution. On hand, you have a 420 mL of a 85% alcohol mixture. How much pure water will you need to add t
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Answer:

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Step-by-step explanation:

You need 420 mL of a 70% alcohol solution.

420 mL of solution and 70% of it should be alcohol.

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Let

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Darina [25.2K]

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