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azamat
2 years ago
15

2x+7y= -5 5x - 7y = 14

Mathematics
2 answers:
il63 [147K]2 years ago
8 0

Answer:

19

Step-by-step explanation:

Jlenok [28]2 years ago
5 0

Let's solve for x:

2x+7y=−5

Step 1: Add -7y to both sides.

2x+7y+−7y=−5+−7y \\ 2x=−7y−5

Step 2: Divide both sides by 2.

\frac{2x}{2}  = \frac{7y−5}{2}\\ x=  \frac{ - 7}{2}  y+ \frac{ - 5}{2}

Therefore, the answer for the first one will be x = -7/2 y + -5/2.

Let's solve for x.

5x−7y=14

Step 1: Add 7y to both sides.

5x−7y+7y=14+7y \\5x=7y+14

Step 2: Divide both sides by 5.

\frac{5x}{5} = \frac{7y + 14}{5} \\ x= \frac{7}{5} y+ \frac{14}{5}

Therefore, the answer for the second one will be x = 7/5 y + 14/5

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Can someone please help me with this plz only on 13
BaLLatris [955]

Answer:

2/9

Step-by-step explanation:

To determine the fraction of students that walk to school, take the fraction of students that do not ride the bus and multiply by the fraction that walk

6/15* 5/9

Simplify the fractions

6/15 Divide the top and bottom by 3

2/5

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4 0
3 years ago
Mrs Alivia’s bathroom is in the shape of a rectangle with a width of 6 feet. Her kitchen is in the shape of a rectangle with a w
Vedmedyk [2.9K]

Answer:

1. The length of the bathroom is equal to its width.  FALSE

2. Equation 2(x+6)=29 can be used to find the length of the bathroom, x.

TRUE

3. The legend of the bathroom is 11.5 feet.  FALSE

4. The equation 2 x+6=29 can be used to find the length of bathroom, x.

FALSE

5. The length of the bathroom is 8.5 feet. TRUE

Step-by-step explanation:

Here, given:

The width of the bathroom = 6 feet

The width of the kitchen = 10.75 ft

The perimeter of the bathroom = 29 feet

Let us assume the length of the bathroom =  k units

PERIMETER OF A RECTANGLE = 2 ( LENGTH + WIDTH)

Now, for the Mrs Avila's bathroom

29 feet  = 2 (k + 6)

⇒ 29  = 2k + 12

or, 2 k =  29 - 12 = 17

⇒ k = 17/2  = 8.5 feet

So, the length of the bathroom = 8.5 units

Now, let us consider the given statements:

1. The length of the bathroom is equal to its width.  FALSE

As here, Length= 8.5 units and width =   6 units

2. Equation 2(x+6)=29 can be used to find the length of the bathroom, x.

TRUE

3. The legend of the bathroom is 11.5 feet.

FALSE, the length of the bathroom is 8.5 units.

4. The equation 2 x+6=29 can be used to find the length of bathroom, x.

FALSE, the correct equation that can be used is  2x + 12  = 29

5. The length of the bathroom is 8.5 feet.

TRUE

5 0
3 years ago
The sum of two numbers is 63. The larger number is 23 more than the smaller number. What are the numbers?
Sunny_sXe [5.5K]

x+y=63

x=y+23

y+23+y =63

2y +23 = 63

2y =40

y=40/2 =20

y = 20

x = 20+23=43

the numbers are 20 & 43

5 0
3 years ago
Read 2 more answers
Which statement is true about this argument? premises: if an angle measure is greater than 90°, then the angle is an obtuse angl
vazorg [7]
Answer: option d. the argument is valid by the law of detachment.

The law of detachment consists in make a conlcusion in this way:

Premise 1) a => b
Premise 2) a is true

Conclusion: Then, b is true

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IN this case:

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Premise 2) angle = 102 [i.e. it is true that angle > 90]]

Conclusion: it is true that angle is obtuse

3 0
3 years ago
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A study of commuting times reports the travel times to work of a random sample of 1010 employed adults in Chicago. The mean is x
MrMuchimi

Answer:

standard error of the mean = 1.6960

Step-by-step explanation:

Given -

Mean (\overline{X}) = 53 minutes

Standard deviation ( s ) = 53.9 minutes

n = 1010

standard error of the mean  =  

\sigma _{\overline{X}}    =   \frac{s}{\sqrt{n}}

        = \frac{53.9}{\sqrt{1010}}

       =  1.6960

3 0
3 years ago
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