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2 years ago

Express -23 in the form bi where b is a real number TIME SENSITIVE

Mathematics

1 answer:

balu736 [363]2 years ago

4 0

Answer:

Step-by-step explanation:

i stands for square root of negative 1. If you multiple i and square root of 23 you will end up with the original

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Solve 2x^2 + x − 4 = 0

ki77a [65]

Answer:

x= −1 /4 + 1 /4 √33

5 0

2 years ago

Read 2 more answers

Which of the following is a polynomial with roots 4, -5, and 7?

o-na [289]

Answer:

Step-by-step explanation:

given the roots of a polynomial, say x = a, x = b and x = c, then

(x - a), (x - b) and (x - c) are it's factors and the polynomial is the product of it's factors.

here the roots are x = 4, x = - 5 and x = 7, hence

(x - 4), (x + 5) and (x - 7) are the factors

f(x) = a(x - 4)(x + 5)(x - 7) ← a is a multiplier

let a = 1 and expand the factors

f(x) = (x² + x - 20)(x - 7)

= x³ + x² - 20x - 7x² - 7x + 140

= x³ - 6x² - 27x + 140 → A

6 0

3 years ago

An island is 3 kilometers due north of its closest point along a straight shoreline. A visitor is staying in a tent that is 13 k

spin [16.1K]

Answer:

The visitor should run 13 km due west from the tent

Step-by-step explanation:

Here we have;

Location of island = 3 km North of point on shoreline

Location of tent = 13 km East of point on shoreline

Running speed of visitor = 8 km/h

Swimming speed = 1 km/h

Distance of island from tent = $\sqrt{3^{2} + 13^{2} } = 13.34 km$

Since, time = distance/speed, it will take 13.34/1 hours or 13.34 hours to swim directly to the island.

However if the visitor first runs to the closest point on the shoreline to the island, then swims across to the island, it will take;

13/8 Hr + 3/1 hr = 37/8 hours or 4.625 hours only.

Therefore, to minimize the time it takes to reach the island, the visitor has to run 13 km west of the tent to first get to the closest point of the shoreline to the island before swimming across to the island.

3 0

2 years ago

Read 2 more answers

1/3 of the guests chose beef , 5/12 of the guests chose chicken 69 of the guests choose vegetarian how many guests were there at

Vlad1618 [11]

we can call guest x

1/3x+5/12x+69=total guests at the wedding

if we multiply 1/3 by 4 we get 4/12. we can add 4/12 to 5/12 to get 9/12 which can be reduces to 3/4. that means the vegetarian guests make up 1/4 of the wedding. if 69 is 1/4, then we have all the information we need to solve this

25% 69 ----- ------ 100% ?

we are solving for the question mark. this is just a diagram. we know 25% of the 100% of the guest and we know that we have 69 of the however many guest. multiply 100 by 69

100x69=6900

now divide 6900 by 25

6900/25=276 guests at the wedding

8 0

3 years ago

Circle the expression equivalent to (5x^3)^2<br>25x^5<br>25x^6<br>10x^5<br>10x^6

lions [1.4K]

Answer:

It's 25x^6.

Thumbs-up (^_-)

7 0

2 years ago