Tens place value, like twenty five
Answer:
Step-by-step explanation:
Remember these rules for addition, substraction, multiplication or division:
Addition
+ + = +
- - = -
Big + number - = +
Big -number + = -
Substraction
change the sign!
And follow the rules for addition
Multiplication or division
+ + = +
- - = +
+ - = -
Now for the exercise
<u>- (
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Change the signal
<u>(
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Answer:
what kind of a question is this? lol. seems liek u need to subtract those 20 students from 70. im not sure wat ur askin but here. try this.
Answer:
a = 12
Step-by-step explanation:
a² + 9² = 15²
a² = 15² - 9²
a² = 225 - 81
a² = 144
take the square root of both sides
a = 12
Start with x:
Since x and 57º make a straight line, x+57 = 180 (because a line is 180º). This says x=123º
Now for y:
Because lines m and n are parallel, y and 57º are alternate interior angles and have the same measure. y=57º
Finish with z:
Since y and z make a straight line, can you finish that one from here?
