PEMDAS
20div2*10
100
Write the following sentence using mathematical symbols:
Two times the sum of three and y amounts to four.
2(3+y)=4
What is the additive inverse of -11.2?
11.2
Give an example of the commutative property.
a+b=b+a
2/3+1/5
13/15
1+2(1-4)^2
19
Write the following sentence using mathematical symbols:
The difference of eight and x is the same as the product of 2 and x.
8-x=2x
What is the multiplicative inverse of -9?
-1/9
Give an example of the associative property.
a+(b+c)=(a+b)+c
1/4-6/7
-17/28
(abs(-2)^3+1)/(-7-sqrt4)
-1
Write the following sentence using mathematical symbols:
The quotient of z and nine amounts to nine plus z.
z/9=9+z
Simplify the following expression:
7x^2+3-5(x^2-4)
2x^2+23
Give an example of the distributive property.
a(b+c)=ab+ac
12/17*4/9
16/51
3-[(4-6)+2(5-9)]
13
Write the following sentence using mathematical symbols:
The sum of five and y is greater than or equal to 7.
5+y>=7
Simplify the following expression:
(2.1x-5.6)-(-x-5.3)
3.1x-0.3
Is the following expression true? If no, explain.
a+(b-c)=(a+b)-c
No; associative property is only true for numbers that are added or multiplied.
7/8div6/13
91/48 or 1 43/48
(-2sqrt(12+4)-(-3)^2)/(6^2+abs(1-9))
-17/44
Write the following sentence using mathematical symbols:
Twenty is less than the difference of five and twice x.
20<5-2x
Simplify the following expression:
1/2(4a-6b)-1/3(9a+12b-1)+1/4
-a-7b+7/12
Is the following expression true? If no, explain.
a(b-c)=ab-ac
Yes
(1/2+3/4)/(7/8-2/3
6