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
Oduvanchick [21]
3 years ago
8

Solve the system

Mathematics
1 answer:
konstantin123 [22]3 years ago
7 0
Use substitution. 

y = 2 - x and y = 4x + 7 can become

2 - x = 4x + 7

Now solve for x

-5 = 5x

-1 = x

Now plug -1 for x in either equation.

y = 2 - x -> y = 2 - (-1) -> y = 3
y = 4x + 7 -> y = 4*-1 + 7 -> y = -4 + 7 -> y = 3

So C) is the correct answer.
You might be interested in
Calculate the amount of hcn that gives the lethal dose in a small laboratory room measuring 12.0 ft×15.0 ft×8.50ft.
Anarel [89]
Dimensions of the room in cm = 2.54 x 12 by 15 x 2.54 by 2.54 x 8.5 = 30.48 by 38.1 by 21.59

Volume of the room in cubic cm = 30.48 x 38.1 x 21.59 cubic cm = 25,072.21 cubic cm

Given that the density of air at room temperature is 0.00118g/cm^3, thus the mass of air in the room = 25,072.21 x 0.00118 = 29.59 g = 0.0296 kg

Given that the lethal dose of HCN is approximately 300 mg HCN per kilogram of air when inhaled, thus the <span>amount of HCN that gives the lethal dose in the small laboratory room is given by 300 x 0.0296 = 8.88 mg.</span>
7 0
3 years ago
This is Math 3. I am confused because of the -2
zhuklara [117]

Answer:

x=5

Step-by-step explanation:

for the work I use a website called symbolab.com and it does all the work and everything for you!

6 0
3 years ago
What is the probability that a phone number generated using the digits 1, 2, 2, 4, 5, 5, 6, and 2 is the number 654-5222
pochemuha

Answer:

336 ways

Step-by-step explanation:

The digits are 1, 2, 2, 4, 5, 5, 6, and 2 that is total eight digits.

The number 654-5222 contains 7 digits.

So, we have find The number of permutations for choosing 7 digits from 8 digits given above.

This can be done in following ways

\frac{8!}{3!\times2!} = \frac{40320}{6\times2}

= 336 ways

7 0
3 years ago
Finding angle measures between intersecting lines
grin007 [14]

Answer: 60° angle

Step-by-step explanation: AGD is a 90° angle, therefore, subtracting 30 from the 90 degrees gives you 60. As x is vertical to the 60 degree angle and verticals have the same degree measurement, x=60°.

3 0
3 years ago
X^2-12x+12=0 completing the square
Makovka662 [10]

Answer:

x1 = 6 + 2√6 or x2 = 6 - 2√6

Step-by-step explanation:

x² - 12x + 12 = 0

We need to use formula:

a² - 2ab + b² = (a - b)².

x² - 12x  =  - 12

x² - 2*6x + 6²- 6² = - 12

(x - 6)² - 36 = -12

(x - 6)² = - 12 + 36

(x -6)² = 24

(x - 6) = √24 or (x-6) = -√24

(x - 6) = 2√6 or (x-6) = - 2√6

x = 6 + 2√6 or x = 6 - 2√6

3 0
3 years ago
Other questions:
  • A company purchases shipments of machine components and uses this acceptance 11) sampling plan: Randomly select and test 30 comp
    12·1 answer
  • The diagram shows a square of side 3 in. containing a circle of diameter 3 in. To the nearest hundredth, what is the area of the
    15·1 answer
  • What is the product of 7 times 7 times 7?
    11·2 answers
  • Quadrilateral ABCD is similar to quadrilateral EFGH. What is the length of<br> segment BC?
    13·2 answers
  • the ratio of the corresponding linear measures of two similar cans of cat food is 4:3. the larger can has a SA of 100 inches. fi
    7·1 answer
  • P(A) = 0.50 P(B)= 0.80 P(A and B) = 0.20 . what is P(B\A)?
    10·2 answers
  • PLZZZ HURRY
    10·2 answers
  • 45% to a decimal ples help out
    5·2 answers
  • What is the y intercept
    9·1 answer
  • HELP ME IN MY MATH QUESTION PLEASE(ᗒᗣᗕ)՞
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!