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deff fn [24]
2 years ago
7

23.

Mathematics
1 answer:
olganol [36]2 years ago
6 0

72 boys.

Step-by-step explanation:

no. of boys (initial) : no. of girls : no. of boys (final)

3 : 2

3 : 2

______________________________________

9 : 6 : 4

9u - 4u = 5u = 30

5u = 30

1u = 30/5 = 8

9u (initial no. of boys) = 8×9

= 72

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(-30(-7))-(210(-3))=
Vlad [161]

Answer:

840

Step-by-step explanation:

(−30)(−7) − (210)(−3)

=210 − (210)(−3)

=210 − (−630)

=840

Hope this helps!

brainliest?

:)

3 0
2 years ago
Read 2 more answers
Help? Please?<br> I really suck at geometry
Maslowich

Answer:

x = 14

y = 4

Explanation:

Ok so, just from looking at the two triangles i can tell they're congruent right triangles. I used different colors to show which sides of the triangle correspond and are equal to each other in my attatched photo.

So the side thats equal to x is the same length as the side that's equal to y+10 on the other triangle.

So we can write the equation x = y + 10.

Using this same method, the side that's equal to x + 2 is the same length as the side that's equal to 4y on the other triangle.

So, we can write the equation 4y = x + 2.

Now we have the equations \left \{ {{x=y+10} \atop {4y=x+2}} \right. you could rewrite to be in slope- intercept form so they're easier to graph. But a graphing calculator online would plot it just fine.

If you graph these two equations they'll intersect at the solution ( 14, 4 ). I'll include the graph in my images as well.

To check your answer, you can plug in x and y and see if the triangle sides end up being the same length. I did and it was correct.

8 0
3 years ago
Use the equation n= b-4 to find the value of n when b=9
Valentin [98]

Put 9 in for b

N=9-4

N=5

6 0
3 years ago
Identify all the prime numbers within each range of numbers given below (inclusive): a. 4 to 11 and b.) 16 to 25
scZoUnD [109]

Answer:

A. 5, 7, 11; B: 17, 19, 23

Step-by-step explanation:

These are all the numbers that don't have common factors besides one and itself

5 star, thank, and brainliest if helpful!

8 0
3 years ago
HELP MY MOM IS GOING TO KILL ME
alex41 [277]

Answer:

−a2+17b

Step-by-step explanation:

6 0
2 years ago
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