Questions by Changwang Zhang

Questions by Changwang Zhang

Use the graph to calculate the following

asked Jan 13, 2020

1 answer

1 vote

37.5k views

Question using this equation: 1.25x=0.75x+50

asked Jan 14, 2019

1 answer

4 votes

218k views

For which system of equations is (2, 2) a solution? A. –3x + 3y = 0 x + 6y = 10 B. –2x + 5y = –6 4x – 2y = 4 C. 5x – 2y = –6 3x – 4y = 2 D. 2x + 3y = 10 4x + 5y = 18

asked Jan 4, 2019

2 answers

2 votes

6.4k views

The gases that help shape the earth temperature are

asked Nov 6, 2018

1 answer

1 vote

173k views

A two-step reaction mechanism that has an overall reaction of 2H2O2(aq) mc012-1.jpg 2H2O(l) + O2(g) has the following fast step and rate law. Step 2: H2O2 + OI– mc012-2.jpg H2O + O2 + I– (fast) Rate =

asked Sep 5, 2018

2 answers

3 votes

127k views

How do you find the percent of a number? ex: 87 is 37% of___ ___is 32% of 25

asked Apr 10, 2018

1 answer

3 votes

142k views

Celeste wants to have her hair cut and permed and also go to lunch. She knows she will need $86. The perm costs twice as much as her haircut and she needs 5$ for lunch. How much does the perm cost?

asked Feb 14, 2018

1 answer

2 votes

86.1k views

The addictive substance in tobacco is A) tar B) ddt C) epinephrine D) nicotine

asked May 20, 2017

2 answers

5 votes

216k views

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