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3 years ago

Please help with this i would be so glad and happy.

Mathematics

1 answer:

weqwewe [10]3 years ago

3 0

Answer:

Step-by-step explanation:

d) (-2 +4i) -( 3 + 9i) = -2 + 4i - 3 - 9i

= -2 - 3 + 4i - 9i

= -5 - 5i

e)3i(6 - 5i) = 3i *6 - 5i * 3i

= 18i - 15*i² {i² = -1}

= 18i -15*(-1)

= 18i + 15

= 15 + 18i

f) (-3 + 7i)(1 - 2i) = (-3)*1 - 2i * (-3) + 7i *1 - 2i* 7i

= -3 + 6i + 7i - 14i²

= -3 + 6i + 7i - 14*(-1)

= -3 + 6i+ 7i + 14

= 11 + 13i

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Please help me with this question!!

Verdich [7]

Answer:

y is 8

Step-by-step explanation:

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3 years ago

Read 2 more answers

a 120 lb. person would weigh about 20 lb. o. the earth's moon. A 150 lb. person would weigh 28 lb. on lo, a moon of Jupiter. Use

Naddik [55]

I think it would look like this 20:28 or 120:150

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4 years ago

The county fair charges $1.25 per ticket for the rides. Spencer bought 17 tickets for the rides and spent a total of $30.75 at t

lara [203]

Answer:

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Step-by-step explanation:

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3 years ago

What is the domain of f(x) = -x2 + 4 g(x) = -3x

erica [24]

Answer:

Step-by-step explanation:

(−∞,∞)

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3 years ago

An elevator can hold a maximum of 1500 pounds. An average child weighs 75 pounds and the average adult weighs 150 pounds. The el

CaHeK987 [17]

Let's take this problem step-by-step:

Let's first set up some variables:

c: # of children
a: # of adults

Let's examine the information given:

Elevator can hold a maximum of 1500 pounds

⇒ average child is 75 pounds

⇒ average adult is 150 pounds

⇒ therefore: $75c + 150a\leq 1500$

Elevator can fit no more than 14 people

⇒ therefore: $c + a \leq 14$

Let's graph the equations:

$75c+150a\leq 1500\\c+a\leq 14$

⇒ look at the image attached

The point at which the two graphs intersect:

⇒ is the solution that represents the amount of children and adults and

their combine weight

With the horizontal axis being the # of children and vertical axis being the # of adults:

⇒ the solution is 8 children and 6 adults

Answer: 8 children and 6 adults

Hope that helped!

7 0

2 years ago