# math

posted by .

Ihave to evalaute expressions can someone tell me which whay is the correct way.

15+ 20 ÷ 5
Is
15 + 4= 19 or 5 ÷ 5=9

210-5 x 30
Is it
210-150=60 or 205 x30=61590

Have you heard of BEDMAS?

it shows the correct order of operation in arithmetic
B-brackets first
E-exponents
D
M ...Division and Multiplication in the order they come
A
S ... Addition and Subraction in the order they come

so for your first one it is
15 + (20 ÷ 5)
=15 + 4
=19

thanks I got the next one
210-150=60

## Similar Questions

1. ### Math

Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer?

If 0°<= 360°, solve the equation, sec x=-2 a. 150° and 210 ° b. 210° and 330° c. 120° and 240° d. 240° and 300° I believe it is C. am i right?
3. ### math

Find the mean of the following set of numbers. 13, 15, 18, 18, 18, 19, 22, 26, 28, 33 is this correct?
4. ### Physics

While standing on a frictionless ice surface, a 50 kg skater pushes against a wall with an average force of 150 N west for 0.210 s. Calculate the velocity of the skater at 0.210 s. This was what i did: m = 50 kg Fnet = 150 N t = 0.210 …
5. ### physics

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus?
6. ### Physics

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus?
7. ### Physics

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus?
8. ### math

Which one(s) of these twelve brands would be considered outliers, if there are indeed any at all?
9. ### Physical Science

1. Which equation correctly shows beta decay?
10. ### math

A local photocopying store advertises as follows. " We charge 9 cents per copy for 150 copies or less, 6 cents per copy for each copy over 150 but less than 210 , and 3 cents per copy for each copy 210 and above. " Let x be the number …

More Similar Questions