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creativ13 [48]
3 years ago
7

WILL GIVE BRAINLIEST!!!!!

Mathematics
2 answers:
Svetach [21]3 years ago
7 0

Answer:

1.   30x+60y=800

let 60y=800-30x

then:

30x+800-30x=800

0=0

2.     You look nice and smart  and a little mean

Darrick (DJ) Webb

Step-by-step explanation:

tatuchka [14]3 years ago
7 0

Answer:

infinitely many

Step-by-step explanation:

30x+60y=800

let 60y=800-30x

then:

30x+800-30x=800

0=0

infinitely many- unless you want to factor it instead of solving

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Find x when y = 3 in the literal equation 3x + 6y= 24.<br> A. 3<br> B. 18<br> C. 6<br> D. 2
alekssr [168]

Answer: It is D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the solution of this system of linear equations? 3y=3/2x+6 1/2y-1/4x=3.
tensa zangetsu [6.8K]

Answer:

No solution

Step-by-step explanation:

Please, separate equations with a comma, or the word "and," or a semicolon.

Next, determine the LCD and multiply both equations by it, so as to elimiinate the fractional coefficients.

3y=3/2x+6 1/2y-1/4x=3

should be written as the system

   3y=(3/2)x+6         Use parentheses around the fraction for clarity

(1/2)y-(1/4)x=3            Same:  use parentheses

The LCDs here are 2 (for the first equation) and 4 (for the second equation).  Multiply the first equation by 2 to eliminate the fractions:

   3y=(3/2)x+6         →   6y = 3x + 12, and

4[ (1/2)y-(1/4)x=3 ]     →   2y  -  x   = 12

Let's use the substitution method to solve this system.  Solve the 2nd equation for x, obtaining x = 2y - 12.  Substitute 2y - 12 for x in the 1st equation 6y = 3x + 12:

6y = 3(2y - 12) + 12, or

6y = 6y - 36 + 12

This reduces to 0 = -24, which is never true.  Thus,

this system has NO solution.

 

5 0
3 years ago
An employee in a shoe repair store must schedule his day so that he can complete all of his work. To do that, he must know how l
sdas [7]

It takes him 17 minutes to make each shoe.

<em>How to Solve: </em>

  1. take away the 30 min lunch break from the time becomes 11:45 to 4:00
  2. calculate the distance from 11:45 to 4:00 which is 4 hours and 15 minutes to complete each shoe.
  3. Convert the hours into 60 minutes each so 60*4= 240 now add the extra minutes 240+15= 255 minutes
  4. Now divide that bye 15 shoes 255/15= 17 minutes
  5. So it takes 17 minutes to make each shoe. :)
6 0
3 years ago
Find three numbers such that their sum is 12, the sum of the first, twice the second, and three times the third is 31, and the s
Tpy6a [65]

Answer:

a = 3, b = -1, c = 10

Step-by-step explanation:

Let the three numbers be a, b and c.

Equation 1: a + b + c = 12

Equation 2: a + 2b + 3c = 31

Equation 3: 9b + c = 1

Equation 2 - Equation 1:

Equation 4: b + 2c = 19

Equation 3 times by the number 2

Equation 5: 18b + 2c = 2

Equation 5 - Equation 4

17b = -17

b = -1

Substitute into Equation 4:

2c - 1 = 19

2c = 20

c = 10

Substitute into Equation 1:

a + b + c = 12

a - 1 + 10 = 12

a = 3

8 0
3 years ago
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If angle X is an acute angle with tan X = 8/7, what is the value of sec X?
iren [92.7K]

Answer: \frac{\sqrt{113}}{7}

Step-by-step explanation:

As X is an acute angle, all 6 trigonometric functions with an argument of X are positive.

Using the identity 1+\tan^{2} X=\sec^{2} X,

1+\left(\frac{8}{7} \right)^{2}=\sec^{2} X\\\\\sec^{2} X=\frac{113}{49}\\\\\therefore \sec X=\boxed{\frac{\sqrt{113}}{7}}

5 0
2 years ago
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