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
elena-s [515]
2 years ago
11

robert has money in his saving account. he spent $35 of it on a new jacket. he has $70 left. how much money did he have his savi

ngs before he bought the jacket
Mathematics
1 answer:
aliina [53]2 years ago
6 0
He had $105 in his savings
You might be interested in
A new computer can complete a complex biochemistry calculation in 7 hours less than an older-model computer. Working together, t
Alchen [17]
The rate a computer works is 1/time. Working together, you add the rates.
Let new computer be x, old computer be y.
x = y - 7

\frac{1}{x} + \frac{1}{y} = \frac{1}{13} \\  \\ \frac{1}{y-7}+\frac{1}{y} = \frac{1}{13} \\  \\ \frac{2y-7}{y(y-7)} = \frac{1}{13} \\  \\ y(y-7) = 13(2y-7) \\  \\ y^2-33y+91 = 0 \\  \\ y = 29.96 \\  \\ x = y-7 = 29.96-7 = 22.96
Rounded to nearest tenth gives:
x = 23 hours
6 0
3 years ago
Your friend attempted to factor an expression as shown. Find the error in your friends work. Then factor the expression correctl
loris [4]

Answer:

Third step is incorrect. The correct factored form is (x-1)(2x-5).

Step-by-step explanation:

The given expression is

2x^2-7x+5

We need to find the factored form of this expression.

Step 1: Given

2x^2-7x+5

Step 2: Splitting the middle term method, the middle term can be written as (-5x-2x).

2x^2-5x-2x+5

(2x^2-5x)+(-2x+5)

Step 3: Taking out common factors from each parenthesis.

x(2x-5)-1(2x-5)

Step 4: Taking out common factors.

(x-1)(2x-5)

Therefore, the third step is incorrect. The correct factored form is (x-1)(2x-5).

3 0
2 years ago
A leprechaun places a magic penny under a​ girl's pillow. The next night there are 2 magic pennies under her pillow. The followi
vfiekz [6]

Answer:

34

Step-by-step explanation:

Since the pennies need to be kept under the pillow in order to be doubled, we're really looking for the day the girl will wake up with 5 billion pennies under her pillow.

The general formula of that geometric sequence will be: t = 1 + 2^(n-1)

We need to find the value of n when t will be over 5,000,000,000.

So, the equation becomes:

5,000,000,001 = 1 + 2^(n-1)

2^{n-1}= 5,000,000,001

log(2^{n-1}) = log(5,000,000,000)

(n-1) * log(2) = log(5,000,000,000)

n-1 = log(5,000,000,000) / log(2)

n-1 = 22.25

n = 33.25

Since it has to be complete days, and we have to reach over 5 billion, then we round it up to 34.

7 0
3 years ago
Debby pays rent twice a year, buys groceries once every quarter, and buys a transit pass
Natasha2012 [34]
<h3>Answer: 2x+4y+12z (choice B)</h3>

Work Shown:

x = amount of rent paid per half year

2x = amount of rent paid annually

y = amount spent on groceries per quarter

4y = amount spent on groceries annually

z = amount spent on a transit pass monthly

12z = amount spent on transit pass annually

2x+4y+12z = total amount of money spent annually

8 0
3 years ago
The diameter of a circle is 1 meter.the circumference is how many centimeters
andre [41]

Step-by-step explanation:

C= pi×d

d=.5 meters

so plug in the numbers

3.14 × .5= 1.75

circumference= 1.75 meters

3 0
3 years ago
Other questions:
  • Pls help me i think its the first one
    9·1 answer
  • Which of the following numbers listed below are solutions to the equation?
    7·1 answer
  • An airplane is at a location 800 miles due west of city X. Another airplane is at a distance of 1,200 miles southwest of city X.
    14·2 answers
  • Nina has 8 bags of potting soil.She puts an equal amount of soil in 3 outdoor planters.How much potting soil does Nina put in ea
    8·2 answers
  • A candidate took a phone poll of 110 people. Of the 110 people polled, 87 said they would vote for the other person. There are 9
    8·2 answers
  • Một công ty cần tuyển 4 nhân viên. Có 10 người, gồm 7 nam và 3 nữ nộp đơn xin dự tuyển, và mỗi người đều có cơ hội được tuyển nh
    8·1 answer
  • A researcher observes the level of aggression of six 5-year-old boys over the course of a school day. The number of incidents fo
    12·1 answer
  • 4cmx4cmx4cm pls SOMEONE 25 POINTS
    9·2 answers
  • A tank of water was drained at a constant rate. The table shows the number of gallons of water left in the tank
    5·1 answer
  • Given that (5,-9) is on the graph of f(x), find the corresponding point for the function -2/3f(x)​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!