Answer:
help me i have -30 points
Step-by-step explanation:
48 girls are there. Given that there is a ratio of boys to girls of 7:8. Then divide 42 boys by 7 boys which equals 6. After, multiply 6 by 8 girls equals 48 girls.
Answer:

Step-by-step explanation:
apply exponent rule:

45 degrees, you are cutting the right angle in half
What vectors? do you have more info?