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Readme [11.4K]
2 years ago
10

There are 10 girls in the class. This is three less thank half the number of boys . How many boys are in the class?

Mathematics
2 answers:
Andreas93 [3]2 years ago
5 0

Answer:

there are 6 boys

Step-by-step explanation:

alexdok [17]2 years ago
3 0
If 10 is 3 less, then adding 3 to 10 is 13 and if 13 is half the number of boys then 13 + 13 is 26. I’m not too sure but I think the answer is 26 boys
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What are the real and complex solutions of the polynomial equation? x^3-8=0. with imaginary numbers
seraphim [82]

Answer:

Solutions are 2,  -1 +  0.5 sqrt10 i  and -1 - 0.5 sqrt10 i

or 2,  -1 +  1.58 i  and -1 - 1.58i

(where the last 2 are equal to nearest hundredth).


Step-by-step explanation:

The real solution is x = 2:-

x^3 - 8 = 0

x^3 = 8

x = cube root of 8 = 2

Note that a cubic equation must have  a total of 3 roots ( real and complex in this case).  We can find the 2 complex roots by using the following identity:-

a^3 - b^3 = (a - b)(a^2 + ab + b^2).

Here  a = x and b = 2 so we have

(x - 2)(x^2 + 2x + 4) = 0

To find the complex roots we solve x^2 + 2x + 4 = 0:-

Using the quadratic formula x = [-2 +/- sqrt(2^2 - 4*1*4)] / 2

= -1 +/- (sqrt( -10)) / 2

= -1 +  0.5 sqrt10 i  and -1 - 0.5 sqrt10 i

4 0
2 years ago
Read 2 more answers
yesterday Kate and her cousin Robert went out for a movie. there they spent $50 in total. Robert spent $10 more than kate. how m
antoniya [11.8K]

<em>while the two were at the movies Katie spent $40.00</em>

6 0
3 years ago
A triangle has two sides of length 1 and 8. What is the smallest possible whole-number length for the third side?
valkas [14]

Answer:

8

Step-by-step explanation:

For the smallest possible length, this has to be one of the shorter sides. Let the length of this side be x.

So, by the triangle inequality theorem, 1+x>8, which means x>7.

So, the smallest possible whole number length is 8.

7 0
2 years ago
Lilly has read seven-eighths of her book and is on page 147. How many pages does lilly have left to read?
lara [203]

Answer:

21

Step-by-step explanation:

Since Lilly has read 7/8 of her book (aka 147 pages), divide 147 by 7 and you get 21.

This means 1/8=21

Since she has read 7/8 of the book, and the full book is 8/8, 8/8-7/8= 1/8

Meaning she has 1/8 of the book left to read.

As said before, 1/8 =21

Thus, she has 21 pages left to read.

4 0
3 years ago
For a snack, sameer ate a plum with 32 calories and several strawberries with 4 calor each. If the total number of calories in S
solmaris [256]

6 strawberries.

one plum= 32 calories

one strawberry=4 calories

total calories=56

56-32=24

24 calories come from the strawberries

24÷4=6

Therefor 6 strawberries


4 0
3 years ago
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