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Sauron [17]
3 years ago
11

25 points and brainiest

Mathematics
1 answer:
-BARSIC- [3]3 years ago
5 0
2. $1000/65hrs = $15.38 per hour

3. Assuming that you get time and a half for OT.
$25 x 45hrs + 1.5(20hrs x $25)
= $1125 + $750
=$1875

4. You lose 8 hrs pay. So you only work 32 hrs.
32hrs x $25 = $800
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A cereal company fills boxes with 16 ounces of cereal. the acceptable percent error in filling a box is 2.5%. find the least and
miskamm [114]
Least = 16 - 0.025 * 16 =   15.6 ounces
Greatest = 16 + 0.025*16 =  16.4 ounces
7 0
3 years ago
Let $a$ and $b$ be nonzero real numbers such that
algol [13]
<h3>Answer:   -7/2</h3>

=========================================================

Explanation:

Let's expand out (2 - 7i)(a + bi) using the FOIL rule

(2 - 7i)(a + bi) = 2a + 2bi - 7ai - 7bi^2

(2 - 7i)(a + bi) = 2a + 2bi - 7ai - 7b(-1)

(2 - 7i)(a + bi) = 2a + 2bi - 7ai + 7b

(2 - 7i)(a + bi) = (2a+7b) + (2bi-7ai)

(2 - 7i)(a + bi) = (2a+7b) + (2b-7a)i

We're told the result is purely imaginary. What this means is that the real part (2a+7b) is zero, while the imaginary part (2b-7a) is nonzero. If both are zero, then we have 0+0i = 0 which is purely real.

For example, the complex numbers 0-7i and 0+2i are purely imaginary.

Let's use the fact that 2a+7b must be zero to do the following steps:

2a+7b = 0

2a = -7b

a = -7b/2

a/b = -7/2 which is the final answer

We must check to see if 2b-7a is nonzero

2b - 7a = 2b - 7(-7b/2)

2b - 7a = 2b + 24.5b

2b - 7a = 26.5b

The result is nonzero if and only if b is nonzero. Luckily we're told b is nonzero at the top of the problem. So we don't have any worries that (2b-7a) is zero.

Therefore, (2a+7b) + (2b-7a)i will be purely imaginary with a/b = -7/2

------------------

A concrete example:

Let a = -14 and b = 4

a/b = -14/4 = -7/2

(2-7i)(a+bi) = (2-7i)(-14+4i) = 0 + 106i which is purely imaginary.

I'll let you do the steps in expanding that out using the FOIL rule.

4 0
1 year ago
A circle with the equation (x + 3)2 + (y - 2)2 = 25 is reflected over the line x = 2.
zlopas [31]
(x-7)² + (y-2)² = 25
3 0
3 years ago
Read 2 more answers
What is 2,750 plus 2,750?
jek_recluse [69]
2750plus2750equels5500
5 0
3 years ago
Read 2 more answers
A uniform bar of length l and weight w is attached to a wall with a hinge that exerts a horizontal force hx and a vertical force
maria [59]
The answer is Hx = ½ Wsin θ cos θ
The explanation for this is:
Analyzing the torques on the bar, with the hinge at the axis of rotation, the formula would be: ∑T = LT – (L/2 sin θ) W = 0
So, T = 1/2 W sin θ. Analyzing the force on the bar, we have: ∑fx = Hx – T cos θ = 0Then put T into the equation, we get:∑T = LT – (L/2 sin θ) W = 0
4 0
3 years ago
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