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3 years ago

Rate of change from X = 15 to X = 19.

Mathematics

1 answer:

vova2212 [387]3 years ago

8 0

Answer:

26%

Step-by-step explanation:

Subtract the old amt from the new amt, then divide by the old amt:

19-15/15 = 4/15 = 26.6%. Rounded to the nearest tenth it would be 26%.

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I NEED HELP AND BEING TIMED SO GIVE CROWN FOR ANSWER

-Dominant- [34]

Answer:

Correct Answer: Option 3

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

If g(x)=3x-2, find g(8)-g(5)

finlep [7]

Answer:

g(x)=3x-2

g(8)=3×8-2

=22

g(5)= 3×5-2

=13

g(8)-g(5)= 22-13=9

5 0

2 years ago

The ratio of the number of boys to the number of girls in a theater is 7:9. There are 12 more girls than boys. How many children

skelet666 [1.2K]

Ok, there is an equation you can use to solve it.

n is a number.

p is also a number, but different to n.

$\frac { 7 }{ 9 } \cdot \frac { n }{ n } =\frac { p }{ p+12 } \\ \\ \frac { 7 }{ 9 } \cdot 1=\frac { p }{ p+12 } \\ \\ \frac { 7 }{ 9 } =\frac { p }{ p+12 }$

$\\ \\ 7\left( p+12 \right) =9p\\ \\ 7p+84=9p\\ \\ 9p-7p=84\\ \\ 2p=84\\ \\ p=\frac { 84 }{ 2 } \\ \\ p=42$

Therefore:

<u></u> $\frac { 7 }{ 9 } \cdot \frac { n }{ n } =\frac { 42 }{ 42+12 } =\frac { 42 }{ 54 } =\frac { 7 }{ 9 } \cdot \frac { 6 }{ 6 } \\ \\ \therefore \quad n=6$

So all together there were 54 girls and 42 boys in the theatre.

54 + 42 = 96

That's 96 children in total. (Answer)

7:9 = 42:54

5 0

3 years ago

What is the product of 2x + y and 5x – y + 3?

VMariaS [17]

Step-by-step explanation:

Distribute:

=2x+(y)(5x)+(y)(−y)+(y)(3)

=2x+5xy+−y2+3y

Answer:

=5xy−y2+2x+3y

7 0

1 year ago

What is the value of X if 3/2x +4 =2x-1

masha68 [24]

Let's isolate x by moving the -1 to the left and the 3/2x to the right (direction chosen so that you don't get negative numbers):

$4 + 1 = 2x - \frac{3}{2}x \implies 5 = \frac{1}{2}x$

Now multiply both sides by 2 and swap sides:

$2 \cdot 5 = 2 \cdot \frac{1}{2}x \implies x = 10$

5 0

3 years ago