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Assoli18 [71]
3 years ago
9

The product of 15 and a number x is −75.

Mathematics
1 answer:
lesya [120]3 years ago
7 0

Answer:

the solution is in the figure

the number is -5

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Nina [5.8K]

Answer:

The slope is 0

Step-by-step explanation:

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3 years ago
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What is the lowest common denominator of the following two fractions?
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nesecito puntos pa preguntar una cosa

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Find the point 3x - 7x₂ =5. of the lines x, - 5x2 = 1 and of intersection
tia_tia [17]

Answer:

(\frac{9}{4},\frac{1}{4})

Step-by-step explanation:

We are given that two lines

x_1-7x_2=5 and x_1-5x_2=1

We have to find the intersection point of two lines

Let 3x_1-7x_2=5 (equation 1)

x_1-5x_2=1 (Equation 2)

Multiply equation 2 by 3 then subtract  from  equation 1

-7x_2+15x_2=5-3

8x_2=2

x_2=\frac{2}{8}=\frac{1}{4}

Substitute x_2=\frac{1}{4} in the equation 1

Then, we get

3x_1-7\frac{1}{4}=5

3x_1-\frac{7}{4}=5

3x_1=5+\frac{7}{4}=\frac{20+7}{4}=\frac{27}{4}

x_1=\frac{27}{4\times 3}=\frac{9}{4}

Hence, the intersection point of two given lines is (\frac{9}{4},\frac{1}{4})

6 0
3 years ago
The circumference of a circle is a 12.1mm. Find the length of the radius. Give your answer rounded to 1 DP.​
faltersainse [42]

Answer:

1.9

Step-by-step explanation:

r=C/2π

r-12.1/2π=1.9257...

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A shopper purchased 4 tables and 2 chairs for $200 and 2 tables and 7 chairs for $400. What is the cost of each table and each c
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4t+2c=200
2t+7c=400

I will solve for c in terms of t first
4t+2c=200
2c=200-4t
c=100-2t

Then I will substitute this in for c in the second equation to make it single variable
2t+7c=400
2t+7(100-2t)=400
2t+700-14t=400
300t=12
t=25 
Tables cost $25 each

Plug t back into one of the ORIGINAL equations to find the cost of chairs
4(25)+2c=200
100+2c=200
2c=100
c=50
Chairs cost $50 each

Hope this helps! :)


6 0
4 years ago
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