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Step2247 [10]
3 years ago
8

When a² + a – 3 is subtracted from 3a? – 5, the result is

Mathematics
2 answers:
Marina CMI [18]3 years ago
7 0

Answer:

2a^2 - a - 2

Step-by-step explanation:

SCORPION-xisa [38]3 years ago
6 0

Answer:

2a^2 - a - 2

Step-by-step explanation:

(happy to help!!!)

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-3/7*(-8)= plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Sindrei [870]

Answer:

3.42857143

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What complex number is represented by the polar coordinates (4, -pi/4)
nexus9112 [7]

Answer:

\displaystyle \large{z=2\sqrt{2} -2 \sqrt{2}i}

Step-by-step explanation:

A complex number is defined as z = a + bi. Since the complex number also represents right triangle whenever forms a vector at (a,b). Hence, a = rcosθ and b = rsinθ where r is radius (sometimes is written as <em>|z|).</em>

Substitute a = rcosθ and b = rsinθ in which the equation be z = rcosθ + irsinθ.

Factor r-term and we finally have z = r(cosθ + isinθ). How fortunately, the polar coordinate is defined as (r, θ) coordinate and therefore we can say that r = 4 and θ = -π/4. Substitute the values in the equation.

\displaystyle \large{z=4[\cos (-\frac{\pi}{4}) + i\sin (-\frac{\pi}{4})]}

Evaluate the values. Keep in mind that both cos(-π/4) is cos(-45°) which is √2/2 and sin(-π/4) is sin(-45°) which is -√2/2 as accorded to unit circle.

\displaystyle \large{z=4\left(\frac{\sqrt{2}}{2} - \frac{\sqrt{2}}{2}i \right)}\\\\\displaystyle \large{z=2\sqrt{2} -2 \sqrt{2}i}

Hence, the complex number that has polar coordinate of (4,-45°) is \displaystyle \large{z=2\sqrt{2} -2 \sqrt{2}i}

3 0
2 years ago
PLEASE HELP ME I NEED TO FINISH THIS!!!
egoroff_w [7]

Answer:

2, 1, 1/2, 1/4

Step-by-step explanation:

2¹ = 2

2^0 = 1

2^-¹

= 1/2¹

= 1/2

2^-2

= 1/2²

= 1/2*2

= 1/4

To complete the table

2² 2¹ 2^0 2^-1 2^-2

4 2 1 1/2 1/4

5 0
3 years ago
The bill from your plumber was $134. The cost for labor was $32 per hour. The cost for materials
galben [10]

Answer:

2.75 hours, or 2 hours and 45 minutes

Step-by-step explanation:

Subtract the cost of materials from the bill, 134-46=88.

Then, for every hour, he charges 32, so divide the difference by 32, 88/32.

5 0
3 years ago
What is the answer for x?<br> 5=-2.5x+8
Airida [17]
The answer for x is
x = 1.2
7 0
3 years ago
Read 2 more answers
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