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
mamaluj [8]
3 years ago
12

Can someone help me with this word problem.

Mathematics
2 answers:
vaieri [72.5K]3 years ago
7 0
Yeah so the notebooks=n and binders=b

3n+7b=47
12+7b=47
-12 -12
7b= 35
b= 5
Sunny_sXe [5.5K]3 years ago
7 0
4 x 3 = 12

47-12 = 35

35 divided by 7 is 5

so I believe he bought 5 binders

if you add it up it like 5 x 7= 35+12= 47
You might be interested in
What are the ordered pairs of the
9966 [12]

Start by writing the system down, I will use y to represent f(x)

y=x^2-5x+3\wedge y=-3

Substitute the fact that y=-3 into the first equation to get,

-3=x^2-5x+3

Simplify into a quadratic form (ax^2+bx+c=0),

x^2-5x+6=0

Now you can use Vieta's rule which states that any quadratic equation can be written in the following form,

x^2+x(m+n)+mn=0

which then must factor into

(x+m)(x+n)=0

And the solutions will be m,n.

Clearly for small coefficients like ours 5,6, this is very easy to figure out. To get 5 and 6 we simply say that m=3, n=2.

This fits the definition as 5=3+2 and 6=2\cdot3.

So as mentioned, solutions will equal to m=3, n=2 but these are just x-values in the solution pairs of a form (x,y).

To get y-values we must substitute 3 for x in the original equation and then also 2 for x in the original equation. Luckily we already know that substituting either of the two numbers yields a zero.

So the solution pairs are (2,0) and (3,0).

Hope this helps :)

5 0
2 years ago
It cost $8.31 to power one laptop computer for one year. How much does it cost to power 10 for one week.
svp [43]

Answer:

$1.60

Step-by-step explanation:

1 year have 52 weeks.

8.31/52=0.16

0.16*10= 1.60

5 0
3 years ago
Identify the volume and surface area of the sphere in terms of π.
Anastasy [175]

Answer:

Sphere Formulas in terms of radius r:

Volume of a sphere: V = (4/3)πr.

5 0
2 years ago
What is 4x-3=92 when you solve the answer
mixas84 [53]
4x-3=92
4x=92+3
4x=95
x= \frac{95}{4}  \\ x=23\frac{3}{4}   \\ x=23,75

3 0
3 years ago
Read 2 more answers
Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5
kondor19780726 [428]

Answer:  1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : \alpha=1-0.99=0.01

Using the t-distribution table ,

Critical value : t_{n-1, \alpha/2}=t_{21,0.005}= 2.831

Standard deviation: \sigma=\text{ 2.5 dollars }

Then, we have

E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

4 0
3 years ago
Other questions:
  • The gift shop at a science museum sells lollipops that are made to look like the planets. each lollipop is shaped like a sphere
    13·1 answer
  • The price of a small used car is three times greater than the price of a used motorcycle. If the price of the motorcycle is $950
    9·1 answer
  • g is constructing a triangular sail for a sailboat. Aluminum supports will run along the horizontal base and vertical height of
    13·1 answer
  • Sarah made pizzas for her party. She put meat on 1/2 of the pizzas. Only 1/4 of the meat pizzas has sausage on them. How many of
    15·2 answers
  • The scale of a railroad train set is 3.5 mm to 1 foot if the link of the model car in this it is 150 mm what is the approximate
    10·1 answer
  • Write the ratio of the first measurement to the second measurement. Compare in millimeters.
    6·1 answer
  • HELPPPPPPP!!!!!!!!!!!!!!!!!
    12·2 answers
  • He can run 5 miles in 50 minutes what is the unit rate that he runs in one minute ?
    5·1 answer
  • Caroline wants to compare the expressions 15-9 and 9 (-15) to determine which result is greater. How can she do this without fin
    10·1 answer
  • Can y'all help me with my math problem please
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!