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2 years ago

Which two complex numbers when added together and written in standard form equal 10-3i?

Mathematics

1 answer:

dedylja [7]2 years ago

4 0

Answer:

A -3 − 4i C 13 + i

Step-by-step explanation:

We add the real part and the imaginary part separately.

Adding A and C will give us 10 - 3i:

-3 - 4i + 13 + i

= -3 + 13 - 4i + i

= 10 - 3i.

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J) You spend $35. Tip is 15%. How much did you pay in total?

rusak2 [61]

Answer:

You paid $40.25 in total.

Step-by-step explanation:

In this question:

Spending of 35%

Tip of 15% means that 15% of 35 will be added to your total spending. So

$T = 35 + 0.15*35 = 35 + 5.25 = 40.25$

You paid $40.25 in total.

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2 years ago

A cake weighs 225g and is shared equally between five people. what weight of cake does each person receive?

cluponka [151]

Step-by-step explanation:

$\frac{225g}{5} = 45$

which means each person receive 45g cake

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2 years ago

Please someone what is the total surface area of this pryamid

Dimas [21]

Answer:

$\large\boxed{C.\ (25+25\sqrt3)\ in^2}$

Step-by-step explanation:

We have the square and four equilateral triangles.

The formula of an area of a squre:

$A_S=a^2$

a - length of side

The formula of an area of an equilateral triangle:

$A_T=\dfrac{a^2\sqrt3}{4}$

a - length of side

Clculate the areas:

SQURE:

$A_S=x^2\ in^2$

TRIANGLE:

$A_T=\dfrac{x^2\sqrt3}{4}\ in^2$

The SURFACE AREA of a square pyramid:

$S.A.=A_S+4A_T\\\\S.A.=x^2+4\cdot\dfrac{x^2\sqrt3}{4}=x^2+x^2\sqrt3$

Put x = 5:

$S.A.=5^2+5^2\sqrt3=(25+25\sqrt3)\ in^2$

7 0

3 years ago

Solve for x: 2x^2 + 3x = 2 <br>solving other quadratic equation by factoring

DIA [1.3K]

Answer: x=1/2,-2

not sure if that is what you need

Step-by-step explanation:

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2 years ago

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Naily [24]

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2 years ago