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const2013 [10]
3 years ago
15

2r - 12 = 12 - 10r whats the answer

Mathematics
2 answers:
Serga [27]3 years ago
7 0

Answer:

dude what is r?

Step-by-step explanation:

for example

3 + 3z - 10

if z is 2

3 + 3 × 2 - 10

Andrew [12]3 years ago
4 0

Answer:

r=2

Step-by-step explanation:

bring the numbers to the other sides

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Step-by-step explanation:

the central angle is the same as the arc

mDE= 104°

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mDEF= 180°

mCFD= 180°

mDFE= 256°

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(SAT Prep) Find the value of x.
photoshop1234 [79]

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Step-by-step explanation:

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After 3 minutes, a submarine had descended to −320 feet. After 8 minutes, the submarine had descended to −420 feet. Assuming a l
LiRa [457]

Answer:

d(t) = -20t - 260

Step-by-step explanation:

The depth function is:

d(t) = mt + b

After 3 minutes, a submarine had descended to −320 feet.

This means that d(3) = -320. So

d(t) = mt + b

-320 = 3m + b

After 8 minutes, the submarine had descended to −420 feet.

This means that d(8) = -420. So

d(t) = mt + b

-420 = 8m + b

From the first equation:

b = -320 - 3m

So

-420 = 8m + b

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m = \frac{-100}{5}

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b = -320 - 3*(-20) = -260

So

d(t) = -20t - 260

7 0
3 years ago
Solve the following problems. Be sure to indicate if a solution is to be rejected based on the contextual situation.
aleksklad [387]

Answer:

1. 5/3 cm

2. 10 in

Step-by-step explanation:

1. The length of a rectangle is 4 cm more than 3 times its width.

Let the length be L and the width B

Then,

L = 4 + 3B

If the area of the rectangle is 15 cm2

Area = LB = 15

B(4 +3B) = 15

3B² + 4B - 15 = 0

3B² - 5B + 9B - 15 = 0

B(3B - 5) + 3(3B - 5) = 0

(3B - 5)(B + 3) = 0

3B - 5 =  or B + 3 = 0

B = 5/3 or -3

since B cannot be negative, B = 5/3 cm

2. The ratio of length to width in a rectangle is 2 ∶ 3.

Let the length be L and the width B

Then,

L/B = 2/3

2B = 3L, B = (3/2)L

when the area is 150 in2.

Area = LB = 150

(3/2)L² = 150

L² = 150×2÷3

L² = 100

L = √100

L = ±10

since the length cannot be negative, L = 10 in

4 0
3 years ago
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