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labwork [276]
3 years ago
14

Substitute y = 2x + 1 y = 3x - 1

Mathematics
1 answer:
Svet_ta [14]3 years ago
4 0
2x+ 1 = 3x - 1 ;
1 + 1 = 3x - 2x ;
2 = x ;
x = 2 ;
Then, y = 2x2 + 1 = 5 ;
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(b) How much the selling price should be fixed for pulse bought for Rs.70 per kg. to earn a profit of Rs.6 after allowing a 5 %
Mama L [17]

Answer:

Rs. 80

Step-by-step explanation:

Given that :

Purchase price = 70

Profit = 6

Discount = 5%

Let selling price = x

Selling price * (1 - discount) = (purchase price + profit)

x * (1 - 5%) = (70 + 6)

x * (1 - 0.05) = 76

x * 0.95 = 76

0.95x = 76

x = 76 / 0.95

x = 80

Hence, selling price = Rs. 80

3 0
3 years ago
Samir bought 3 pounds of cement to repair the cracks in his sidewalk.
r-ruslan [8.4K]

Answer:

16oz=1lbs

First you need to see how many ounces equals three pounds, so you wanna go 16*3=48

You bought 48 ounces

You now take 48/2=24

You can fill 24 cracks with 3 pounds of cement

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is 782,943 rounded to the nearest ten thousand
Effectus [21]
The answer is 780,000
3 0
3 years ago
Read 2 more answers
Gareth 30 students in a class and the ratio of boys to girls in the class is 2:3 calculate the number of goals
pishuonlain [190]

Answer:

<em>There are 12 boys and 18 girls</em>

Step-by-step explanation:

<u>Equations</u>

There are 30 students in a class. Let's call:

x = number of boys

Since the sum of boys and girls is 30:

30 - x = number of girls

The ratio of boys to girls is 2:3, thus:

\displaystyle \frac{x}{30-x}=\frac{2}{3}

Crossing denominators:

3x = 2(30 - x)

Operating the parentheses:

3x = 60 - 2x

Adding 2x:

5x = 60

Dividing by 5:

x = 60/5 = 12

x = 12

There are 12 boys and 30-12=18 girls

8 0
3 years ago
The table below shows the outputs y for different inputs x:
igor_vitrenko [27]
Part A)
The table doesn't represent y as a function of x.
Why? <span>One reason is that 1 or 3 is the first element in more than one ordered pair.
 Part B)
f(x) = 10x + 20
f(120)= 10*120 + 20 = 1200 + 20 = 1220 
</span><span>f(120) represents cost of boating for 120 hours.</span><span>
 </span>

3 0
3 years ago
Read 2 more answers
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