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Expand and simplify 5(x+4)-3(2+3x)

5(x+4)-3(2+3x) Expand first bracket 5x+20-3(2+3x) Expand second bracket 5x+20-6-9x simplify 14-4x
JF
Answered by Jacob F. • Maths tutor
5491 Views

A 4 digit number is picked. It's second digit is a prime number, it must be even and it must be greater than 5000. How many possible numbers can be picked?

This involves the product rule for counting. Step 1: Identify the possible numbers for the first digit 5, 6, 7, 8 or 9 (5 in total) Step 2: Identify the possible numbers for the second digit 2, 3, 5 or 7 (4 ...
TS
Answered by Thomas S. • Maths tutor
7821 Views

Factorise 15a^2 + ab - 6b^2

15a 2 +ab-6b 2 =(?a+?b)(?a-?b) factors of 15= 3 and 5 factors of 6= 2 and 3 if we try (3a+2b)(5a-3b) that gives us 15a 2 +10ab-9ab-6b 2 = 15a 2 +ab-6b 2 therefore the answer is (3a+2b)(5a-3b)
AB
Answered by Aayushi B. • Maths tutor
3602 Views

Calculate the distance travelled by the ball traveling at 3m/s for 60 seconds

Speed = Distance/Time Speed = 3 Time = 60 Distance = Speed x Time Distance = 3 x 60 = 120m
SG
Answered by Sam G. • Physics tutor
3720 Views

A fridge of height 2m and width 0.8m is tilted in a delivery van so that one edge rests on the edge of a table and another touches the ceiling, as shown in the diagram. The total height of the inside of the van is 1.5m. Find the height of the table.

Let h be the height of the table. Let the edges of the fridge be A touching the ceiling, B touching the table and C touching the floor. Let D be the point on the ceiling vertically above B and E be the point...
CH
Answered by Charles H. • Maths tutor
3618 Views