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
GarryVolchara [31]
3 years ago
12

3х — 7y = 21

Mathematics
1 answer:
Zolol [24]3 years ago
7 0
Answer:

Explanation:

3x - 7y = 21

6x = 14y + 42
Or 6x - 14y = 42

3x - 7y = 21 (1)
6x - 14y = 42 (2)
———————
-2(3x - 7y = 21)
6x - 14y = 42
———————
-6x + 14y = -42
6x - 14y = 42
———————
0x + 0y = 0

So I think in this case x and y has infinitely many solution
You might be interested in
How do I solve inscribed angles?
Slav-nsk [51]
The triangles are similar so the angles are equal
2x^2 - 2 = 10x - 2
2x^2 - 2 - 10x + 2 = 0
2x^2 - 10x = 0
2x(x - 5) = 0
2x = 0       OR        x - 5 = 0
x = 0         OR        x = 5
0 doesn't make sense, because IF I plug 0 into 2x^2 - 2 I get a negative number.  We need to use 5 to find the angle measure

2(5^2) - 2 = 2(25) - 2 = 50 - 2 = 48 degrees or the measure of CED
4 0
3 years ago
Juan has x apples and 8 oranges. How many fruits does he have? Give your answer in terms of x
zubka84 [21]
X apples and 8 oranges = x+8

The answer is x+8.

Hope this helped☺☺
3 0
3 years ago
What sample size is needed to give a margin of error within plus-or-minus 5% in estimating a population proportion with 90% conf
VARVARA [1.3K]

Answer: 271.

Step-by-step explanation:

When the prior population proportion of success is not available, then the formula to find the sample size is given by :-

n=00.25(\dfrac{z_{\alpha/2}}{E})^2

Given : Significance level : \alpha: 1-0.90=0.1

By using the standard normal distribution table ,

Critical value : z_{\alpha/2}=1.645

Margin of error : E=0.05

Then , the required minimum sample size will be :-

n=0.25(\dfrac{(1.645)}{0.05})^2=270.6025\approx271

Hence, the required minimum sample size is 271.

4 0
3 years ago
The largest set of x values satisfying
velikii [3]

Answer:

If p\ge -\dfrac{1}{3}, then x>\dfrac{2}{3}+p and mn=\dfrac{2}{3}+p=\left(\dfrac{2}{3}+p\right)\cdot 1,\ \ m+n=\dfrac{5}{3}+p

Step-by-step explanation:

Solve two inequalities for x.

1. 2,018x-p

Separate terms with x and without x into two sides:

2,018x-2,020x

Multiply by -1:

2x>-2p\\ \\x>-p

2. 7x+3p

Separate terms with x and without x into two sides:

7x-10x

Multiply by -1:

3x>2+3p\\ \\x>\dfrac{2}{3}+p

Find the largest set of x values satisfying both inequalities:

x>-p\\ \\x>\dfrac{2}{3}+p

If

-p>\dfrac{2}{3}+p\\ \\-2p>\dfrac{2}{3}\\ \\2p

then x>-p and mn=-p=p\cdot (-1),\ m+n=p-1. In this case both m and n are negative.

If p>-\dfrac{1}{3}, then x>\dfrac{2}{3}+p and mn=\dfrac{2}{3}+p=\left(\dfrac{2}{3}+p\right)\cdot 1,\ \ m+n=\dfrac{5}{3}+p

If p=-\dfrac{1}{3}, then x>\dfrac{1}{3} and mn=\dfrac{1}{3}=\dfrac{1}{3}\cdot 1,\ \ m+n=\dfrac{4}{3}

7 0
3 years ago
Elijah waited until June u,2017 to file his 1040 for tax year 2016. His balance due is $88. What is the failure to file penalty?
Ad libitum [116K]
The failure to file penalty refers to the amount of money that a tax payer has to pay as penalty for not filing his tax before the assigned deadline. The failure to pay penalty is 0.5% of the tax balance that is owned per month.
Thus, for Elijah, who is owning $88, the failure to pay penalty is 0.5% *88 = $0.44.
Elijah has to pay $0.44 per month for the period during which he withhold the tax.
7 0
3 years ago
Other questions:
  • Y=x^2-9 if the domain is the set {-3,-2,-1}
    9·1 answer
  • Original price $65.00; Markdown: 12%
    14·1 answer
  • what is the probability that the first coin was a dime and the second coin was a penny? (please someone help me)
    9·1 answer
  • 4 is equivalent to how hundreths
    9·2 answers
  • Which of the following are true statements about any regular polygon? Check all that apply. A. all of it's angles measure 90 deg
    15·1 answer
  • What is the ratio of clocks to tables?<br> 5 tables<br>6 clocks<br><br>6:5<br>5:6<br>5:10<br>6:10​
    13·2 answers
  • I really need help!! Which box doesn't belong??
    5·1 answer
  • Find the value of a.the angle measures are 127 degrees 71 degrees and 102 degrees
    13·1 answer
  • Can you guys helps me real quick please the answer is not 2
    10·2 answers
  • Challenge An arts academy requires there to be 4 teachers for every 96 students and 6 tutors for every 66 students. How many stu
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!