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
Korolek [52]
3 years ago
5

21x+7y=42 and -5x+5y=10 Find the solution to the system of equations​

Mathematics
1 answer:
stiv31 [10]3 years ago
5 0

Answer:

Step-by-step explanation:

x=1 y=3

You might be interested in
Solve 5(2^x+4)=15 round to the nearest thousandth
Novosadov [1.4K]

Answer:

Step-by-step explanation:

Begin by dividing by 5

2x + 4 = 3            

Is this written as 2^(x + 4) = 3? I think it is.

Take the log of both sides

log 2^(x + 4) = log(3)

(x + 4) * log(2) = log 3

log 2 = 0.30103

log 3 = 0.47712

(x + 4) = log2 / log3

x + 4 = 0.63093               Add 4 to both sides

x = -3.369                        Rounded to the nearest thousandth

====================

If you mean the question exactly as it is written (the 4 is not part of the power)

5(2^x + 4) = 15

2^x + 4 = 3

2^x = 3 - 4

2^x = - 1

This can't be done 2 to any power should be >0.

if x>0 then this will give an ever increasing number

if xK0 then this will give an ever decreasing answer but still greater than 0.

No value will make 2^x go to something minus.

If I have misread this in some way, leave a note and I will get back to you.

5 0
3 years ago
How do i do this?....... ​
iris [78.8K]

Order of operations (from high priority to low priority):

Parentheses

Exponents

Multiplications/Division

Addition/Subtraction

All in left to right.

2 ÷ (5 + 3)⁻¹ ÷ 4

2 ÷ (8)⁻¹ ÷ 4

2 ÷ 1/8 ÷ 4

16 ÷ 4

= 4

3 0
3 years ago
Read 2 more answers
What is the slope of the line that passes through the points (-2,3) and (-14, -5)?
TEA [102]
Slope = 2/3 (positive 2/3)
You use the formula Y2-Y1/X2-X1 in order to get the slope

8 0
3 years ago
What is the quotient of 2 divided by 1/6
jekas [21]
It is 12 since 1/6=6^-1=6
implies 2*6=12
5 0
3 years ago
Read 2 more answers
F(x) = 3x2²2 = 13
snow_lady [41]

Answer: 5/13

Step-by-step explanation:

f(2)=\frac{3(2)^{2}-7}{4(2)^{2}-3}=\boxed{\frac{5}{13}}

8 0
2 years ago
Other questions:
  • Please answer as soon as you can, I need it today! I'll give you 15 points!
    8·1 answer
  • Slope intercept, just need one problem solved so I can get an idea thanks
    5·2 answers
  • Pls help ima mark BRAINLIST
    13·1 answer
  • In a particular year, approximately 1.7 million people took the mathematics section of a college achievement test. Of these, 44%
    7·1 answer
  • What is the value of
    15·2 answers
  • PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B
    15·1 answer
  • Amanda simplifies the following expression and shows her work below. What mistake did Amanda make that resulted in an incorrect
    12·1 answer
  • Your friend evaluates the expression when m = 10. is your friend correct? Explain your reasoning.
    14·2 answers
  • A tree in John's backyard has been growing for 4 1/2 years. The tree is 4/5 meters tall. What is the unit rate in meters per yea
    13·1 answer
  • Reflect this figure over the x-axis:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!