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Alborosie
2 years ago
14

Please Help me on number 4

Mathematics
1 answer:
Iteru [2.4K]2 years ago
5 0

Step-by-step explanation:

a.here, 3x+y=6

reducing it into slope intercept form we get,

y=-3x+6

comparing it with y=mx+c we get,

slope(m)=-3 and

y-intercept (c)=6

b.here,y=5x+2

comparing it with y=mx+c we get,

slope(m)=5 and

y-intercept (c)=2

c.here,x=4y-1

reducing it into slope intercept form we get,

4y=x+1

or,y=x/4+1/4

comparing it with y=mx+c we get,

slope(m)=1/4 and

y-intercept (c)=1/4

d.here,y=-x+6

comparing it with y=mx+c we get,

slope(m)=-1 and

y-intercept (c)=6

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The sales tax for an item was $19.20 and it costs $480 before tax. Find the sales tax rate. Write your answer as a percentage
Zigmanuir [339]

Answer:

sales tax rate = 4%

Step-by-step explanation:

In this problem formula to express one term in percentage is used

To express x as percentage of y is given by (x/y*100) %

______________________________________________

Cost of item = $480

sales tax = $19.20

we have to find sales tax rate.

sales tax rate is percentage of cost price which will levied as tax .

thus, we have to find sales tax as percentage of cost price.

using the percentage cost as given above

sales tax as percentage = sales tax/ cost of item *100

sales tax as percentage = 19.20/480 *100 = 4%

Thus, sales tax rate is 4%.

It means that if cost price of item is $100 then $4 will be the sales tax for the item.

5 0
2 years ago
What is the value of x if HF = 4x+1 and AB = 12x-3?|<br><br><br> Given m
Reptile [31]

Answer: <em>x = 1.25</em>

Step-by-step explanation:

<em>HF - is the middle line of the triangle ABC.</em>

HF=\dfrac{1}{2} AB\\\\HF=4x+1\\AB=12x-3\\\\4x+1=\dfrac{1}{2}  \cdot (12x-3)\\\\4x+1=\dfrac{12x-3}{2} \\\\(4x+1) \cdot 2 =12x-3\\8x+2=12x-3\\8x+2-12x=12x-3-12x\\-4x+2=-3\\-4x+2-2=-3-2\\-4x=-5\\-4x \cdot (-1)=-5 \cdot (-1)\\4x=5\\4x \div 4=5 \div 4\\x=1.25

7 0
2 years ago
When 3 times a number is subtracted from 10, the result is the sum of the number and 22
Arada [10]

Answer:

x = -6

Step-by-step explanation:

Let the number be x

<u>Condition:</u>

=> 10-3x = x+22

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<em>Dividing both sides by -2</em>

=> x = -6

6 0
3 years ago
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4a. If (11+x) is positive, but (4+x) is negative, what is one number that x could be?
sattari [20]

Answer:

Step-by-step explanation:

x has to be equal to or less than a -5 to get (4 + x) to be a negative number.

x has to be equal to or greater than -10 for (11 + x) to be a positive number.

Therefore, any number between -10 and -5 will work.

8 0
3 years ago
Please hurry 6of25 and I’m very confused
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selma

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