Answer:
7x+3
Step-by-step explanation:
The only like terms are 5x and 2x
5+2=7
I'm not sure how euros work but I'm almost certain there are 18 20p coins
Answer:

Step-by-step explanation:
step 1
Find the circumference
The circumference of a circle is equal to

we have

assume

substitute

step 2
Find the measure in radians for the central angle of a circle whose radius is 5 and intercepted arc length is 7.2 units
Remember that
The circumference of
subtends a central angle of 
so
using proportion
Let
x-----> the central angle in radians

Answer:
a.0.045km
d.4500cm
e.45000mm
Step-by-step explanation:
45meters is equivalent to 0.045km,4500cm,45000mm
Therefore the right answers are
a.0.045km
d.4500cm
e.45000mm
Answer:
21 questions
Step-by-step explanation:
84%=.84 so multiply the total questions by 84% aka .84
.84*25=21