Answer:
(x+10)(x-10)
Step-by-step explanation:
both numbers can be squared so you have to take out the square and since 100 is negative one must be positive and one must be negative
Answer:
three out of the eight homes have red doors. so 3 homes have red doors
Step-by-step explanation:
Answer:
28
Step-by-step explanation:
If you split the shape in half you get a cube and a trapezium, calculate the area of each and add them together to get the area of the entire shape.
Answer:
(-3,1)
y= 1
x= -3
Step-by-step explanation:
4x-9y=-21
-4x-3y=9
solve the equation
4x=-21+9y
-4x-3y=9
substitute the value of 4x onto an equation
-1(-21+9y)-3y=9
multiply -1 to the numbers in parenthesis
-21+-9-3y=9
add -9 to 9 and put the negative on nine as a positive.
-21-3y=18
add -21 to 18 but since 21 is a negative the equation is subtraction.
-3y=-3
divide Both sides by -3
y=1
substitute the value of y into an equation
-4x-3•1=9
multiply 3 to 1
-4x-3=9
put -3 as a positive and add 3 to 9
-4x=12
divide both sides by -4
x= -3
(-3,1)
7/3u = 21
Multiply both sides by 3
7u = 63
Divide both sides by 7
u = 9
