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2 years ago

Two pencils and one pen cost $0.80, and one pencil and two pens cost $1.15. How many cents would three pencils cost

Mathematics

1 answer:

Margarita [4]2 years ago

5 0

Answer:

.33 cents

Step-by-step explanation:

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Identify the quotient in the form a + bi. HELP ASAP PLEASE!!

Step2247 [10]

Solving the expression $\frac{4-5i}{2+3i}$ we get $-\frac{7}{13}-\frac{22i}{13}$

So, Option A is correct.

Step-by-step explanation:

We need to solve the expression: $\frac{4-5i}{2+3i}$

Multiplying and dividing by 2-3i

$=\frac{4-5i}{2+3i}*\frac{2-3i}{2-3i}\\=\frac{4-5i*2-3i}{2+3i*2-3i}\\=\frac{4(2-3i)-5i(2-3i)}{(2)^2-(3i)^2}\\=\frac{8-12i-10i+15i^2)}{4-9i^2}\\We\,\,know\,\, i^2=-1\\=\frac{8-12i-10i+15(-1)}{4-9(-1)}\\=\frac{8-15-12i-10i}{4+9}\\=\frac{-7-22i}{13}\\=-\frac{7}{13}-\frac{22i}{13}$

So, solving the expression $\frac{4-5i}{2+3i}$ we get $-\frac{7}{13}-\frac{22i}{13}$

So, Option A is correct.

Keywords: Complex numbers

Learn more about Complex numbers at:

#learnwithBrainly

8 0

3 years ago

What is the slope of 9 and 180

Kipish [7]

Answer:

a slope of 9 and 180 would just be 9 and 180 over 1

Step-by-step explanation:

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2 years ago

Y=3x-1 y=-2x+4 what is the sum of x and y in the solution to the system

prohojiy [21]

Answer:

y=1,2 y=2

Step-by-step explanation:

3 0

2 years ago

Can someone please help me with this one? Oh and in the boxes I need to put a number NOT a check mark.

kari74 [83]

Grade 7 : Yes = 2 , No = 3
Grade 8 : Yes = 1 , No = 4

3 0

3 years ago

Gentry poured 23.5 ounces of milk and 7.75 ounces of cream in a mixing bowl.

denpristay [2]

Notice that because the capacity of the bowl is 35.5 ounces, but there has already been 31.25 ounces total added to it (23.5 ounces + 7.75 ounces), all that needs to be done is subtract 31.25 from 35.5:
35.5 - 31.25 = 4.25 ounces of cream could be added

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3 years ago