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3 years ago

Solve equation by the quadratic formula. List the solutions, separated by commas.

Mathematics

1 answer:

ANEK [815]3 years ago

4 0

Answer:

k=−3±i√55

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Step-by-step explanation:

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How do I find the area of the non-shaded figure?!?

gtnhenbr [62]

Answer:

51 cm²

Step-by-step explanation:

rectangle = 6x12=72

triangle = 1/2(7)(6)=21

Non-shaded=72-21=51 cm²

5 0

3 years ago

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What is 130% converted into a decimal?

Free_Kalibri [48]

Move the percent two places to the left 1.30

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3 years ago

The sum of the digits of a two-digit number is 8. The difference between the number and the reversed number is 10 more than the

Vesna [10]

Answer:

The number is 62

Step-by-step explanation:

Let the digits of the number be T and U;

A 2 digit number is represented as: 10T + U

So,

$T + U = 8$

$10T + U - (10U + T) = 10 + 10U + T$

Required

Find the digit

Make U the subject in the first equation

$U = 8 - T$

Substitute 8 - T for U in the second

$10T + U - (10U + T) = 10 + 10U + T$

$10T + 8 - T - (10*(8-T) + T) = 10 + 10(8 - T) + T$

$10T + 8 - T - (80-10T + T) = 10 + 80 - 10T+ T$

$10T + 8 - T -80+10T - T = 10 + 80 - 10T+ T$

Collect Like Terms

$10T + 10T - T- T + 8 -80 = 10 + 80 - 10T+ T$

$18T -72 = 90 - 9T$

$9T + 18T = 90 + 72$

$27T = 162$

$T = 162/27$

$T = 6$

Recall that:

$U = 8 - T$

$U = 8 - 6$

$U = 2$

<em>Hence, the number is 62</em>

5 0

3 years ago

Plz help me asap worth 20 points

Ainat [17]

Answer:

OK so the equation has a exponent so if there is a exponent then you need to multiply. since 227 is the Area and the exponent is 2.

Step-by-step explanation:

3 0

3 years ago

Suppose the area of a circle is 254.4696 square inches. Whats the radius of the circle (use pie=3.1416. A. 18 in. B. 81 in. C. 9

zalisa [80]

Answer:

The radius of the circle is 9 in

Choice C is correct

Step-by-step explanation:

254.4696 square inches. Whats the radius of the circle (use pie=3.1416.

The area of a circle with radius r is given as;

$A=\pi *r^{2}$

We substitute the given area and the value of pi given to solve for the radius;

$254.4696=3.1416*r^{2}\\\\r^{2}=\frac{254.4696}{3.1416}\\\\r^{2}=81\\\\r=\sqrt{81}=9\\\\r=9$

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4 years ago