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slamgirl [31]
3 years ago
13

Evaluate 2x - y + 4z, if x = 1, y = 2 and z = -1

Mathematics
1 answer:
lidiya [134]3 years ago
5 0

2 x 1 - 2 + 4 x -1 =

the answer is -4.

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Find the area of a circle with a diameter of 56 millimeters.
ANEK [815]

Answer: 784π mm²

Step-by-step explanation: To find the area of a circle, start with the formula for the area of a circle which is shown below.

Area = πr²

Notice that here, we're given the diameter instead of the radius.

Remember that the radius is equal to half of the diameter. So the radius of this circle will be equal to half 56 millimeters or 28 millimeters.

So plugging into the formula, we have (π)(28 mm)².

A common mistake is to plug 56 millimeters into the formula but remember that we must plug in the radius and not the diameter.

Multiplying, (28 mm)² is equal to (28 mm)(28 mm) or 784 mm².

So we have 784π mm².

So the area of the circle is 784π mm².

6 0
3 years ago
Ahh i need help this is confusing
Kaylis [27]
I only figured out the answer for the Dorthy question, the answer is 210
7 0
3 years ago
Read 2 more answers
2-33+(-4)+5-(-6)-70=
VikaD [51]
2-33+(-4)+5-(-6)-70=

2-33-4+5+6-70=
-35+5+6-70=
-30+6-70=
-24-70=
-94

Answer=-94

5 0
3 years ago
THIS IS WORTH 50 POINTS I will mark you as the brainlyest only if you graph this on a GRAPH. Graph this on a GRAPH y= 1/3x+3 .
jenyasd209 [6]
I hope this helps. Keep in mind the 1/3 is slope and the 3 is y-intercept.

3 0
3 years ago
Read 2 more answers
Brainliest answer to whoever is right,<br> (6b - 4)(b - 8) = 0.<br> Solve for b
liubo4ka [24]

There are two answers.

b1 = 2/3

b2 = 8

6 0
3 years ago
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