In science class the ratio to girls to boys is 3 to 7.
If their are 50 students in the class, how many boys are there?

Answer:

B. 2

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

9514 1404 393

Answer:

  512 million

Step-by-step explanation:

Expected value is the sum of the products of probability and the value associated with that probability. Here, it is the sum ...

  0.4(390) +0.4(890) +0.2(0) = 512 . . . million

The expected value of the loss over a 5-year period is $512 million.

Answer:its 60

Step-by-step explanation:

look at g and put the number thats there on g

.

Step-by-step explanation:

25) h=11

26). two sides are same = 12cm

27). time = 15 hours

28). veronica travelled = 6+1 = 7 days

29). number of tickets buyed by people each showing : 231

30) ©

Answer:

First ans is true but second one is not the cotrect

one

Answer:

the 12%+13%=25%is correct while the a%=55a=5% is not correct

Answer:

x²+5x+7 = 0

comparing above equation with ax² + bx +c

a=1, b = 5, c= 7

then

using quardatic formula

x = -b ±[tex]\sqrt{b^{2} - 4ac[/tex]

        2a

on solving option d is correct answer

Step-by-step explanation:

Answer:

the answer is x-1/2

Answer:

logarithmic scale

The student might be able to graph these results clearly by taking the log of the values.

For given question,

A student has a range of values from 0.000001 to 1,000,000

We need to find the way so that the student will be able to graph these results.

We can write  0.000001 as [tex]1\times 10^{-6}[/tex]

[tex]\Rightarrow 0.000001=10^{-6}[/tex]

and 1,000,000 as [tex]1\times 10^6[/tex]

[tex]\Rightarrow 1,000,000=10^6[/tex]

If we take the log of these range values, then it would be,

[tex]\Rightarrow log(10^{-6})=-6[/tex]

and [tex]log(10^6)=6[/tex]

This means, the student might be able to graph these results clearly by taking the log of the values.

Learn more about logarithm here:

https://brainly.com/question/20785664

#SPJ3

Answer:

25 miles

pls tell if I'm wrong

Answer:

Step-by-step explanation:

Y= -2/5 x -4/1 so the answer is Y=8/5

Answer:

A) (-3,-2)

Step-by-step explanation:

Answer

35

Step-by-step explanation:

4.55/.13=35. Also, Heidi could do 35x13. I hope this helps!

Answer:

58.3696

Step-by-step explanation

7.64 *7.64=58.3696

Answer:

C: [tex]\frac{5}{2} + \frac{1}{2} i[/tex]

Step-by-step explanation:

Did this through my TI-89 calculator. ^^

Answer:

Slope: [tex]\frac{7}{2}[/tex]

Y-intercept: (0, 2)

Step-by-step explanation:

7x = 2y - 4

-2y = -7x - 4

y = [tex]\frac{-7}{-2}[/tex] x - [tex]\frac{4}{-2}[/tex]

y = [tex]\frac{7}{2}[/tex] x + 2

The slope is always the coefficient of x and the y-intercept is always the constant. It looks like (0, constant) when written in y-int form.

Answer:

slope (m) is 7/2 (aka 3.5) and y-int is (0,2)

Step-by-step explanation:

I don't really have an explanation, basically rearrange the problem so that to y is on the left but it would be 2y so divide the right side by two. I an explain further in depth if needed

E=egg farm

x=distantce between  the Berto´s trains and the meeting point.

t=time where the trains meet up

⇒110 miles/h                                          ⇒85miles/h

[---------------------------E----------------------]-------------------------------------X

[............12 miles.......][........34 miles.....][------------ x ----------------------]

distance between Berto´s train and Eduardo´s train=

=12 miles+34 miles=46 miles.

S=d/t      ⇒d=S*t

S=seed

d=distance

T=time

Eduardo´s train;

46 miles+x=t*110 miles/h  ⇒x=t*110 miles/h-46 miles  (1)

Berto´s train;

x=t*85 miles/h  (2)

With the equations (1) and (2) we suggest this system equations:

x=t* 110 miles/h-46 miles

x=t*85 miles/h

we solve this system equiations :

t*110 miles/h-46 miles=t*85 miles/h

110t miles/h-85t miles/h=46 miles

25 t miles/h=46 miles

t=46 miles/25 miles/h=1,84 hour  (≈1 hour, 50 minutes, 24 seconds)

x=t*85 miles/h=156,4 miles

Solution: 1,84 hour

Answer:

1.84

Step-by-step explanation:

I did it on edge it was correct

Answer:  7.2 + L= 19.5

Answer: Find an answer to your question Find 2 consecutive odd integers such that the sum of twice the larger integer and the smallest integer is 85.

Step-by-step explanation:

Answer:

Step-by-step explanation:

15-3x

15-3(-2)

15+6

21

Answer:

21 is the correct answer

Answer:

80

Step-by-step explanation:

Im not really sure just the thingy says that 80 was the right anwser

Answer:

64

Step-by-step explanation:

Sorry I'm really late.

Answer:

The three integers are 12,13 and 14

Step-by-step explanation:

Let

x,x+1,x+2 be three consecutive integers.

Out of these, the smallest one is x and largest is x+2 as it comes at last in the integers.

So according to given statement

[tex]x+(x+1)+(x+2) = 4x-9[/tex]

This is a linear equation in one variable, which can simply be solved by using equality properties

[tex]x+x+1+x+2 = 4x-9\\3x+3 = 4x-9[/tex]

Subtracting 4x from both sides

[tex]3x+3-4x = 4x-9-4x\\-x+3=-9[/tex]

Subtracting 3 from both sides

[tex]-x+3-3 = -9-3\\-x = -12\\x = 12[/tex]

The smallest integer is 12.

The other integers are:

x+1 = 12+1 = 13

x+2 = 12+2 = 14

Hence,

The three integers are 12,13 and 14

Answer:

505

Step-by-step explanation:

sn=2a+(n-1)d

2*5+(100-1)5

10+(99)5

505

Answer:

x = -17

Step-by-step explanation:

y - y1 = m(x - x1)

y - 3 = 1/5(x - (-2))

y - 3 = 1/5(x + 2)

y - 3 = 1/5x + 0.4

y = 1/5x + 0.4 + 3

y = 1/5x + 3.4

Now we plug in y as 0 to find x

y = 1/5x + 3.4

(0) = 1/5x + 3.4

-3.4 = 1/5x + 3.4 - 3.4

-3.4 = 1/5x times 5

-3.4 times 5 = x

-17 = x

Answer:

Step-by-step explanation:

If we know the slope, we can solve for an unknown coordinate. First, let's review how to calculate slope.

Slope = Rise/Run (Change in y/Change in x)

In this case, we know the slope, so we will write out the slope formula. We will use the substitution method to solve this.

m = rise/run

rise = y2- y1 substituting ----> 3 - 0 = 3

run = x2 - x1 substituting ----> -2 - x = run

Now, we can return to the slope formula, as we now have enough information to solve.

1/5 = 3/R

To solve, we simply need to find the equivalent fraction of 1/5. We will use a proportion.

1R = 5 x 3

R = 15

Now that we know R, we can substitute it into the equation for run.

So, we now have:

15 = -2 - x

Subtracting -2 from both sides, gives us x = -17.

Finally, we must check our answer to make sure we are getting the correct slope when we calculate.

m = (3 - 0)/(-2 - -17)

m = 3/15 OR 1/5

Since. this matches the original slope we were given, we can be sure the answer is correct.

Answer:

11. 74

12. 8.5

13. 194

14. 56

15. the second one so 30.5 is more expensive

16. Manju walked further

Step-by-step explanation:

11. perimeter so add all the sides together

oh they are all perimeter so add the two numbers in each problem and then multiply that number by 2

60 vs 122 so the 30.5 is more expensive

280 vs 288 so manju walked more

brainliest would be greatly appriciated! Thanks!

Answer:

$8320

Step-by-step explanation:

.64 x 13000

Answer:

Step-by-step explanation:

Ok so what you are going to do is  set up and equation where 6x-7=4x-23

you will get x= -8 now plug it in