1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
il63 [147K]
3 years ago
11

Lena had $12. She bought a pack of craft paper for $6 and a sharpener for $2. Which expression correctly shows the total money L

ena has left? A $12 − (−$6) + (−$2) B $12 + (−$6) − (−$2) C $12 − (−$6) − (−$2) D $12 + (−$6) + (−$2)
Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
7 0
The anserw will be D
stiks02 [169]3 years ago
3 0
Lena spent $8 so she has $4 left. A isn't right because the answer to that is 16. B isn't right because it equaled 8. C equaled 20. D equaled 4 so the answer is D.
You might be interested in
Trevor plans on buying a car. Four banks offer the annual interest rates shown.
mote1985 [20]

Solution

In order to find  greatest to least number, we have to convert the given fractions into decimals.

3 \frac{1}{10} % = 3 + 1/10 = 3 + 0.10 = 3.10%

3 \frac{2}{5}% = 3 + 2/5 = 3 + 0.40 = 3.40%

3 \frac{1}{4} %= 3 + 0.25 = 3.25%

3 \frac{1}{3}% = 3 + 0.33 = 3.33%

Now we can easily, compare the numbers and write from greatest to least.

3.40%, 3.33%, 3.25%, 3.10%

Greatest to least  = 3 2/5%, 3 1/3%3, 3 1/4%,  1/10%,

Thank you :)

8 0
4 years ago
Read 2 more answers
A rubber ball is dropped onto a hard surface from a height of 9 feet, and it bounces up and down. At each bounce it rises to 80%
8_murik_8 [283]
There are 12 inches in a foot, so 9ft = 108in. Also, 80% = 0.8. Therefore the formula is: h(n) = 108 * 0.8^n. To find the bounce height after 10 bounces, substitute n=10 into the equation: h(n) = 108 * 0.8^10 = 11.60in (2.d.p.). Finally to find how many bounces happen before the height is less than one inch, substitute h(n) = 1, then rearrage with logarithms to solve for the power, x: 108 * 0.8^x = 1; 0.8^x = 1/108; Ln(0.8^x) = ln(1/108); xln(0.8) = ln(1\108); x = ln(1/108) / ln(0.8) = -4.682 / -0.223 = 21 bounces
4 0
3 years ago
Our math team had m students last year, but this year it has already n students! By what percent did the number of students grow
AlekseyPX
For this case we are going to assume the following:
 m: whole number greater than zero.
 n: integer greater than zero.
 Where,
 n> m
 According to these assumptions, the percentage of growth is given by the following formula:
 (n / m) * 100 - 100
 Answer:
 
the number of students did grow by:
 
(n / m) * 100 - 100
4 0
4 years ago
Read 2 more answers
Dayren is driving to visit family. She drives at a average of 65 miles per hour. She drives 227.5 miles before lunch. And then 9
Kitty [74]

Answer:

5 hours

Step-by-step explanation:

First, add the miles together

Next, divide 65 into the sum of 227.5 and 97.5(which is 325)

8 0
3 years ago
Read 2 more answers
Help and explain pls and thankyouu
defon

Hello,

1)

\left\{\begin{array}{ccc}2x-y&=&7\\-2x+3y&=&9\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}2y&=&16\\-2x+3y&=&9\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}y&=&8\\-2x+3*8&=&9\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}x&=&7.5\\y&=&8\\\end{array} \right.\\\\

Answer C

2)

\left\{\begin{array}{ccc}x-2y-3z&=&5\\x+2y+3z&=&7\\x+z&=&3\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}2x&=&12\\x+2y+3z&=&7\\x+z&=&3\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}x&=&6\\2y+3z&=&1\\z&=&-3\\\end{array} \right.\\\\\\\\\left\{\begin{array}{ccc}x&=&6\\y&=&5\\z&=&-3\\\end{array} \right.\\\\\\

Answer C

5 0
3 years ago
Other questions:
  • Krista lives 1/2 mile from school.
    7·2 answers
  • Help please i don't get it​
    10·1 answer
  • There are 7 women and 9 men if 2 are promoted what is the probability they are both men
    10·1 answer
  • Autry made 45% of the shots he took during the basketball game. If he attempts 20 shots how many times did he score?
    12·1 answer
  • 27^4–9^5 3^9 is divisible by 25
    15·1 answer
  • Please help, i dont know what to do this is my last option.
    10·2 answers
  • Plzzzzz help meeEEEE ALL 3 REWARD BRAINLIESTT
    11·1 answer
  • &gt;…_~§-+*First Answer Gets Brainliest*+-§~_…&lt;<br> Questions In the picture!
    12·1 answer
  • Help me❤️!!!!!!!!!!!
    14·1 answer
  • 2. Three times some number, decreased by five is no less than 16.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!