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kumpel [21]
3 years ago
10

Evaluate 3a²b + 1–20 if a=-5, b=9, and c=-10.

Mathematics
1 answer:
DIA [1.3K]3 years ago
6 0

Answer:

=656

Step-by-step explanation:

Evaluate for a=5,b=9

3(52)(9)+1−20

3(52)(9)+1−20

ps. there is no c

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Peter saves $167 a month. Peter saves $37 less each month than Bill. How much will Bill save in 2 years?
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Answer:

Hello! Your answer should be $2448.

Step-by-step explanation:

First, we should add 37 to 167 to find out how much money Bill makes in one month. Once we find that to be 204, we must multiply that by however many months he will be saving up for (24 months = 2 years). This will give us the expression 204 x 28, which equals 2448.

So, Bill will save $2448 in 2 years. Hope this helps!

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What is the common denominator for 1 2/3 and 3/4
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Step-by-step explanation:

Multiply 1*3

Add 2 to the number

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Answer:

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Step-by-step explanation:

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3 years ago
Suppose m = 2 + 6i, and | m + n | = 3√10, where n is a complex number.
Ksju [112]

Answer: a) √50

b) n = 1 + 7i

Step-by-step explanation:

first, the modulus of a complex number z = a + bi is

IzI = √(a^2 + b^2)  

The fact that n is complex does not mean that n doesn't has a real part, so we must write our numbers as:

m = 2 + 6i

n = a  + bi

Im + nI = 3√10

Im + n I = √(a^2 + b^2 + 2^2 + 6^2)= 3√10

            = √(a^2 + b^2 + 40) = 3√10

             a^2 + b^2 + 40 = 3^2*10 = 9*10 = 90

             a^2 + b^2 = 90 - 40 = 50

            √(a^2 + b^2 ) = InI = √50

The modulus of n must be equal to the square root of 50.

now we can find any values a and b such a^2 + b^2 = 50.

for example, a = 1 and b = 7

1^2 + 7^2 = 1 + 49  = 50

Then a possible value for n is:

n = 1 + 7i

6 0
3 years ago
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