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
sweet-ann [11.9K]
3 years ago
10

7x + 2y = 248x + 2y = 30​

Mathematics
2 answers:
vekshin13 years ago
7 0

Answer:x=3 and y=4

Step-by-step explanation:

Let's solve your system by substitution.

x+y=7;x+2y=11

Step: Solvex+y=7for x:

x+y=7

x+y+−y=7+−y(Add -y to both sides)

x=−y+7

Step: Substitute−y+7forxinx+2y=11:

x+2y=11

−y+7+2y=11

y+7=11(Simplify both sides of the equation)

y+7+−7=11+−7(Add -7 to both sides)

y=4

Step: Substitute4foryinx=−y+7:

x=−y+7

x=−4+7

x=3(Simplify both sides of the equation)

bagirrra123 [75]3 years ago
5 0
(8x + 2y) - (7x + 2y) = 30 - 24

X = 6
You might be interested in
6 + 16x - 2x -12 This is math again
Bogdan [553]

Answer:

14x−6

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The wavelength of red light in a spectrum is about 0.0000007 meters. Which
Nana76 [90]

Answer:

0.0000007

And if we count the number of zeros before the number 7, we can rewrite the number like this:

7x10^{-7}

We cansolve this problem also counting the number of positions that we need to move the decimal point to the right in order to obtain the first number (7)

And the best option would be:

B. 7 x 10-7

Step-by-step explanation:

For this case we have the following number given:

0.0000007

And if we count the number of zeros before the number 7, we can rewrite the number like this:

7x10^{-7}

We cansolve this problem also counting the number of positions that we need to move the decimal point to the right in order to obtain the first number (7)

And the best option would be:

B. 7 x 10-7

8 0
2 years ago
9 (9m+3t)=<br> simplify pls
Aleks04 [339]

Answer:

81m+27t

Step-by-step explanation:

We need to distribute the 9 to the terms inside the parentheses:

9(9m+3t)=9(9m)+9(3t)=81m+27t

8 0
2 years ago
Read 2 more answers
What equation is equal to<br> 3/8 less than a number is 11
PtichkaEL [24]

Answer:

11=x-\frac{3}{8}

5 0
2 years ago
What is the solution to 3x²+x+10=0
e-lub [12.9K]

Answer:

x = - 1/6 + √-119/6, and, - 1/6 - √-119/6

Step-by-step explanation:

Using the quadratic formula which is: - b ± √b² - 4ac / 2a

a = 3, b = 1, c = 10

- 1 ± √1² -4 * 3 * 10 / 2 * 3

- 1 ± √1 - 120 / 6

-1 ± √-119 / 6

= -1/6 + √119/6,               or                  - 1/6 - √-119/6

7 0
3 years ago
Other questions:
  • The Sun illuminates ________________________ of the Moon at all times.
    11·2 answers
  • I need some help I'm kind of stuck here thank u
    13·2 answers
  • Viola is a collegiate volleyball player whose protein needs have been determined to be 1.4 g/kg body weight. Viola is 6'2" tall
    7·1 answer
  • ONLY ANSWER IF YOU KNOW IT CORRECT GETS BRAINLIEST! :))
    6·2 answers
  • In algebra, you can use function _____ to express the idea that salary depends on the number of hours of training.
    9·2 answers
  • Sheila bought burgers and fries for her children and some friends. the burgers cost $2.05 each and the fries are $.85 each. she
    7·1 answer
  • Write the equation of the line shown in the graph in slope intercept form sorry I’m asking for help but my mom slower then a tur
    12·1 answer
  • Evaluate and solve <br> f(3)+f(0) when f (x) = 10x – 5
    15·1 answer
  • Write an equation for each line in slope intercept form​
    10·1 answer
  • The length of a tunnel is 450 miles. On a map of the tunnel, 1 inch represents 60 miles. What is the length of the tunnel on the
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!