The correct answer would be: There are 30 girls in Anya's class.
The result is this because the given ratio of boys to is 10 to 15. The number of boys is 20 which is 2 times the number given in the ration which means that to get to the number of girls in the class we have to multiply the ration of girls, in this case 15, with two. And this way we get to the number of 30 girls in Anya's class.
For more complicated numbers that cannot be calculated right away, always use the following equation:
A:B=C:x
A*x=B*C
x=B*C/A
Hope it helps :)
Answer:
a) 28 days
b) 50 miles
Explanation:
a) 5 miles a day
140 miles ? days
140÷5= 28 days
b) 5 miles a day
? miles 18 days
18×5= 90 miles
140 miles - 90 miles = 50 miles
9514 1404 393
Answer:
A
Step-by-step explanation:
The parallelogram has rotational symmetry of degree 2. It looks the same after rotation by 180°.
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<em>Additional comment</em>
When a figure only looks like itself after a full rotation of 360°, it is said to have rotational symmetry of degree 1. All of the figures here will return to their original appearance after one 360° rotation. So, we assume the intent of the question is to identify figures with a <em>rotational symmetry of degree greater than 1</em>.
Answer:
the 3 represent a one thousand
so that means 4.oo9* 1000 = =49
