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schepotkina [342]
3 years ago
11

6(a)If the gradient of the straight line

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
5 0

Answer:

(i) k =1

(ii) y-intercept is 7

Step-by-step explanation:

<u>Given line:</u>

  • ky = kx + x + 7

<u>Divide all terms by k to get slope-intercept form of the line</u>

  • y = (1 + 1/k)x + 7/k

<u>Since the gradient (slope) of the line is 2:</u>

  • 1 + 1/k = 2
  • 1/k = 1
  • k = 1

<u>The equation is now:</u>

  • y = 2x + 7

<u>y - intercept is found when x = 0</u>

  • x = 0 ⇒
  • y = 2*0 + 7
  • y = 7

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A man has a collection of dimes and nickels with a total value of $1.70. if he has 8 more dimes than nickels how many of each co
Oxana [17]

Answer:

Step-by-step explanation:

We first have to write an expression for each of the types of coins in terms of one of them.  If he has 8 more dimes than nickels, let's call nickels "x".  That means that dimes is "x + 8".  The value of a nickel is .05, so the expression relating the number of nickels to the worth of the nickel is .05x.  The value of a dime is .10, so the expression relating the number of dimes to the worth of the dime is .10(x + 8).  The total value of these coins is 1.70:

.05x + .10(x + 8) = 1.70 and

.05x + .10x + .8 = 1.70 and

.15x = .9 so

x = 6

That means we have 6 nickels and 14 dimes.

6 0
3 years ago
Is the following relation a function?<br><br> X Y<br> 6 -1<br> -1 2<br> 4 3<br> 0 3
german
Answer: Given relation is a function

A relation is said to be a function if no value in its domain is paired up with more than one value in its range.

Since x values represent the Domain of a relation and y values represent the Range of a relation, in terms of x and y we can say:

A relation is said to be a function if an x-value is not paired up with more than one y-value.

From the above table we can see that all the x values are distinct, so no x value is paired with more than one y-value and thus given relation is a function. 
5 0
3 years ago
Read 2 more answers
HELP I WIKL GIVE BRAIN THINGGG
KiRa [710]

Answer:

10x + 3

Step-by-step explanation:

3(2x + 1) + 4x =

= 6x + 3 + 4x

= 10x + 3

6 0
2 years ago
Read 2 more answers
Please solve the following system of equations <br> x+3y=8 <br> 2x-y=2
Anuta_ua [19.1K]

Answer:

(2,2)

Step-by-step explanation:

Given equations are

x+3y=8       eq(1)

2x-y=2        eq(2)

we'll solve the system of equation by substitution.

Adding -3y to both sides of eq(1),we get

x+3y-3y=8-3y

x+0=8-3y

x=8-3y     eq(3)

Put above value of x in eq(2),we get

2(8-3y)-y=2

16-6y-y=2

16-7y=2

Adding -16 to both sides of above equation,we get

-16+16-7y=-16+2

0-7y=-14

-7y=-14

Dividing by -7 to both sides of above equation,we get

-7y/-7=-14/-7

y=2

Putting y=2 in eq(3),we get

x=8-3(2)

x=8-6

x=2

hence, the solution for this system of equations is (2,2).

5 0
3 years ago
4. Use graphing technology to approximate the solutions of the equation x? + 2x – 1 = x + 2 + 2 + the nearest tenth.​
BlackZzzverrR [31]

I'm sorry I don't really know but my guess is 2

5 0
3 years ago
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