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HACTEHA [7]
2 years ago
12

Evaluate each expression when a = -4 and b = 31.) ab2.) 2a + 3b 2.) 2(a - b)​

Mathematics
1 answer:
Svet_ta [14]2 years ago
3 0

1) -12

ab is a times b. We plug in the numbers (-4)*(3) which equals -12.

2) 1

We plug in -4 for a, and 3 for b into the equation.

We get 2(-4) + 3(3)

2*-4 is -8. 3*3 is 9. We add them both, and -8+9 equals 1.

3) -14

We plug in -4 for a, and 3 for b into the equation.

2(-4-3)

-4-3 is -7. -7*2 equals -14.

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Samuel is incorrect because he didn't subtract the power of the numbers.

<h3>How many more rod cells are there?</h3>

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Lesechka [4]

Answer:

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  • arc ZY = 140°
  • arc XY = 82°

Step-by-step explanation:

The angle sum theorem helps you compute the angle inside the triangle. The inscribed angle theorem helps you compute the arc measures outside the triangle.

<h3>Theorems</h3>

The Angle Sum theorem tells you the sum of angles in a triangle is 180°. That lets you write the equation ...

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The Inscribed Angle theorem tells you an inscribed angle has half the measure of the central angle subtending the same arc. The arc and the central angle have the same measure: twice that of the inscribed angle.

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Using the equations we wrote describing the relationships of the unknowns to the known information, we find ...

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