Question

Hiiiiii friends can anybody help me plz

Answer 1

Question 5:

5a) $m-7=3$. Add 7 to both sides: $m=10$.

5b) $\frac{m}{5} =3$. Multiply 5 on both sides: $m=15$.

Question 6: $4(m+3)=18$ Divide both sides by 4: $m+3=\frac{18}{4}$. Subtract 3 to both sides: $m=\frac{18}{4}-3=\frac{18}{4} -\frac{12}{4}=\frac{6}{4}  =1\frac{1}{2}$, or 1.5.

Question 7:

Question 7a: A complementary angle is one of two angles which sum is 90°.

Question 7b: A supplementary angle is the same as a complementary angle, but instead it is one of two angles which sum is 180°.

Question 8: An equilateral has 3 sides. 1 side -> 3.5, 3 sides -> 3.5 x 3 = 10.5.

Question 9: First 5 whole numbers -> 1, 2, 3, 4 and 5. Total: 1+2+3+4+5=15. Mean: 15/5 (The 5 is the amount of numbers) = 3.

Question 10a: $x-4=4$

Question 10b: $y-2=8$.

Question 11: $7(m+3)=28$. Divide both sides by 7: $m+3=4$. Subtract both sides by 3: $m=1$.

Question 12 $16=4+3(t+2)$. Subtract 4 from both sides: $12=3(t+2)$. Divide both sides by 3: $4=t+2$. Subtract 2 from both sides: $2=t$/. Flip it around: t = 2.

Question 13a: 75%:25%

Question 13b: 20%:80%

Question 13c: $42\frac{6}{7}$%:$57\frac{1}{7}$%

Question 14: Difference -> 25000-24500=500

Percentage decrease -> 500/25000 * 100 = 0.02 * 100 = 2%

Q15a: 37.5 Q15b: 500 Q15c: 750