3 years ago

Solve algebraically using substitution or elmantion your choise -2x + 6y = -10 y = -4

Mathematics

1 answer:

Whitepunk [10]3 years ago

3 0

Answer:

x = -7

Step-by-step explanation:

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Use long division to determine the decimal equivalent of 2/3

blagie [28]

Answer: 0.6666... (never ending digit)

Step-by-step explanation:

2/3 divide the numerator, '2' by the denominator '3'

4 0

3 years ago

A circle has an area of 144 cm2.Find the circumference

lara [203]

Circumference of Circle = 2πrArea of circle = πr²144 = 3.14 * r²r² = 144/3.14r² = 45.85r = √45.85r = 6.77 Circumference = 2πr = 2*3.14*6.77Circumference = 42.51 m²
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4 years ago

Drag the tiles to the boxes to form correct pairs.

snow_lady [41]

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Step-by-step explanation:

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3 years ago

Find z1z2 if z1 = 2/5(cos63° + isin63°) and z2 = 10/3(cos117° + isin117°).

Airida [17]

Answer:

-10/3 is the answer

Step-by-step explanation:

Given are two complex numbers as

$z1=\frac{2}{5} (cos63 + isin63)\\z2=\frac{10}{3} (cos 117 + isin117})$

Recall Demoivre theorem as

(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)

Hence here we have sum of angles as

A+B = 63+117 =180

$z1z2=\frac{2}{5} \frac{10}{3} (cos180+isin180)$

= $\frac{-10}{3}$

Since sin180=0 and cos 180=-1

7 0

4 years ago

THis is kinda hard, pls help ASAP

Feliz [49]

Answer:

yep this kinda hard!!!!!!!!!!!!?!??!

7 0

3 years ago