Jackiecroce12
28.06.2019 •
Mathematics
If 10 pencils and 7 erasers cost $4.23 and 3 pencils and 1 eraser cost $0.95, what is the cost of 2 erasers?
Solved
Show answers
More tips
- F Food and Cooking Discover the Benefits and Properties of Dates...
- C Computers and Internet Dynamically Assigned IP Address: What Is It and How Does It Work?...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
Answers on questions: Mathematics
- M Mathematics Solve the equation for y: -3y - 2 = 10...
- M Mathematics What does a daz washing powder look like in 3D net GET IT ASAP...
- M Mathematics 3x + 11 + 5x = 75 x=?...
- M Mathematics Aisha and jordan start by making a floor plan for their treehouWhich revision of these two sentences best shows that the coach blowing the whistle happened first? The...
- M Mathematics 4 2/5 can be written or regrouped as 3 7/5 especially if you need to regroup to be able to subtract in an equation true or false...
- M Mathematics A basketball player made the following number of free throws in 8 successive games: 6, 18, 15, 14, 19, 12, 19, and 15. What is the median number of successful free throws?...
- M Mathematics Whats 1+1 guys im really struggling I think its mayonasse...
- M Mathematics Solve 23t - 31 =24t - 30 for t. Round to the nearest tenth....
- M Mathematics 400% of what number is 80 ?...
- M Mathematics Find the coefficient of x2 in (3x2 – 5) 9 4 + 4x2), expand using algebraic expressions and answer....
Ответ:
$0.58
Step-by-step explanation:
Let x represent pencil and y represent eraser
10x + 7y = 4.23 → 1(10x + 7y = 4.23) → 10x + 7y = 4.23
3x + y = 0.95 → -3(3x + y = 0.95) → -21x - 7y = -6.65
-11x = -2.42
÷-11 ÷-11
x = 0.22
3x + y = 0.95
3(0.22) + y = 0.95
0.66 + y = 0.95
y = 0.29
2y = 2(0.29) = 0.58
Ответ:
86 92
Step-by-step explanation: