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3 years ago

A way to get to 19 x 9

Mathematics

1 answer:

Tcecarenko [31]3 years ago

8 0

Answer:

171

Step-by-step explanation:

calculator

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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

Solve and graph

oksano4ka [1.4K]

2r - 9 > -6
2r - 9 = -6
2r = 3
r = 3/2 = 1.5
r > 1.5

9x-5 < -41
9x-5 = -41
9x = -36
x = -36/9 = -4
x < -4

3x + 13 > 7
3x + 13 = 7
3x = -6
x = -6/3 = -2
x > -2

4x + 3 > -17
4x + 3 = -17
4x = -20
x = -20/4 = -5
x > -5

7x - 4 < 10
7x - 4 = 10
7x = 14
x = 14/7 = 2
x < 2

4 0

3 years ago

Why is it important for student to learn about math(give important details )

weeeeeb [17]

Answer:

Step-by-step explanation:

So they can get prepared for the future

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3 years ago

1.A pizza place offers 6 different cheeses and 12 different toppings. In how many ways can a pizza be made with 1 cheese and 3 t

NNADVOKAT [17]

1.) You have 12 toppings. You choose one topping--that leaves you with 11 toppings. You choose another--that leaves 10. 12×11×10 = 1,320.
Multiply 1,320 topping choices by 6 cheeses to get 7,920 total combinations.

2.) (Though I'm less sure of these)
CDs: 6×5×4×3×2 = 720
Cassettes: 5×4 = 20
DVDs: 8×7×6×5 = 1680

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4 years ago

Pleaseeeee help I’m begging someone I PROMISE. I will mark brainlest

Lerok [7]

Answer:

Step-by-step explanation:

a) x>0 → items can not be negative

b) c(2,000) = 5,000+1.3(2,000) = $7,600

c)5,000+1.3x<10,000

5,000-5,000+1.3x<10,000-5,000

1.3x<5,000

x<3846 items

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4 years ago