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Tanya [424]
4 years ago
10

Help my little sister

Mathematics
2 answers:
guapka [62]4 years ago
6 0
If the folder cost $2 and the notebook cost 4 times that then the notebook cost $8

If the notebook cost 2 times the cost of a set of pencils and a notebook cost $8 then a set of pencils cost $4 (half the cost of the notebook)

We already know the cost of the folder is $2 and we need one of each idem: Folder=$2  Notebook=$8  Pencils=$4 

2+8+4
10+4
14

The total is $14
Lesechka [4]4 years ago
3 0
The total cost of 1 folder, 1 notebook, and 1 set of pencils is $14.00 because 8 + 2 + 4 = 14.
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How many solutions will each system of linear equations have? Match the systems with the correct number of
JulsSmile [24]

Answer:

Step-by-step explanation:

Given that,

y = x + 6 equation 1

3x - 3y = -18.  Equation 2

Substitute equation 1 into equation 2

3x-3(x+6) = -18

3x - 3x - 18 = -18

-18 = -18

Therefore, it has no solution. Check attachment for echelon matrix solution

B. y = -2x + 5 equation 1

2x + y = -7.  Equation 2

Substitute equation 1 into 2

2x -2x + 5 = -7

5 = -7

Since the equation is not balance, then, it has infinite numbers of solution.

C. y = -4x + 11.  Equation 1

6x + y = 11.   Equation 2

Substitute equation 1 into 2

6x - 4x + 11 = 11

2x = 11 - 11

2x = 0

x = 0

Also, y = -4x + 11

y = 0 + 11 = 11

Then, this has a unique solution I.e. one solution.

5 0
3 years ago
Which inequality says that n + 2 is at least 7?
LekaFEV [45]
The answer is C... or a
4 0
3 years ago
Write the point-slope form of the equation of the line through the given point with the given slope.
IrinaVladis [17]

Answer:

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Step-by-step explanation:

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Integrate the following. ∫<img src="https://tex.z-dn.net/?f=84dx" id="TexFormula1" title="84dx" alt="84dx" align="absmiddle" cla
bogdanovich [222]

Answer:

\displaystyle \int {84} \, dx = 84x + C

General Formulas and Concepts:

<u>Calculus</u>

Integration

  • Integrals
  • Definite/Indefinite Integrals
  • Integration Constant C

Integration Rule [Reverse Power Rule]:                                                               \displaystyle \int {x^n} \, dx = \frac{x^{n + 1}}{n + 1} + C

Integration Property [Multiplied Constant]:                                                         \displaystyle \int {cf(x)} \, dx = c \int {f(x)} \, dx

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

\displaystyle \int {84} \, dx

<u>Step 2: Integrate</u>

  1. [Integral] Rewrite [Integration Property - Multiplied Constant]:                 \displaystyle \int {84} \, dx = 84\int {} \, dx
  2. [Integral] Reverse Power Rule:                                                                     \displaystyle \int {84} \, dx = 84x + C

Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit:  Integrations

4 0
3 years ago
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