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Savatey [412]
2 years ago
15

HELP MEEEE PLEASEEEEEEE!

Mathematics
2 answers:
krek1111 [17]2 years ago
8 0

Answer:

4 / 5

Step-by-step explanation:

The ratio will be equal to the number of boys divided by the number of girls so we get...

80 / 100 = 4 / 5

Aliun [14]2 years ago
6 0
The ratio would be 4:5
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What is the diameter, circumference, and area of a circle that has the radius of 7?
user100 [1]

Answer:

the diameter is: 14

the circumference is: C≈43.98

the area is: A≈153.94

Step-by-step explanation:

4 0
3 years ago
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Evaluate the function.<br> f(x) = 2x2<br> Find f(-3)<br><br> Can anybody answer this?
o-na [289]

Answer:

18

Step-by-step explanation:

f(x) = 2x^2

Let x = -3

f(-3) = 2 * (-3)^2

Exponents first

f(-3)=2 *9

f(3) = 18

6 0
3 years ago
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A certain couple tells you that they have two children, at least one of which is a girl. what is the probability that they have
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3 0
2 years ago
If x+a is a factor of 2x²+2ax+5x+10,find a.
vazorg [7]

If x+a is a factor of the polynomial, it means that -a is a root of the polynomial.

In fact, if a polynomial p(x) has a root x_0 (i.e. p(x_0)=0), then the polynomial is divisible by (x-x_0)

In your case, you know that the polynomial is divisible by (x+a)=(x-(-a)), so -a is a solution.

Let's evaluate p(-a) and set it to zero:

2(-a)^2+2a(-a)+5(-a)+10 = 0 \iff 2a^2-2a^2-5a+10=0 \iff -5a+10 = 0 \iff a = 2

We can check the answer: if a=2 the polynomial becomes

2x^2+2(2)x+5x+10 = 2x^2+9x+10

And we're claiming that -a=-2 is a root of this polynomial:

2(-2)^2+9(-2)+10 = 2\cdot 4 - 18 + 10 = 0

5 0
3 years ago
The midpoint of a line segment is the point halfway between its endpoints.<br><br> True or False?
horrorfan [7]
This is true. You can remember by it saying mid, as in middle.
5 0
3 years ago
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