I don’t really understand this type of stuff so please help.

Answers

Answer 1

Answer:

For 1 and 2, you plot both lines, and wherever they intersect is the solution to the system. Given the equation of a line, I think the easiest way to plot it is to find two points on the line, then draw a line through them. For example, if $y=5x-1$ , then when $x=0$ , you get $y=-1$ ; when $x=1$ , you get $y=4$ . So plot the points (0, -1) and (1, 4), then strike a line through.

1. Notice that dividing both sides of $2y=10x-2$ by 2 returns $y=5x-1$ , same as the first equation. So the system of equations reduces to one equation, which can have an infinite number of solutions. (This is because for any choice of $x$ or $y$ , you can always find a corresponding value for the other variable.)

2. See attached image. $3x-y=2$ is given by the purple line.

For 3-6, you have several options. The two simplest methods of solving them are by substitution or elimination.

3. Like with (1), notice that dividing both sides of the first equation by 2 gives $x+3y=9$ , so there will be an infinite number of solutions.

4. (by substitution) Since $y=-7x+3$ , we can replace $y$ in the second equation:

$-7x+3+7x=10\implies3=10$

but this is false, so there are no solutions to this system.

5. (by substitution) Since $x=2y+2$ , in the first equation we have

$-5(2y+2)+3y=-10y-10+3y=-7y-10=11\implies-7y=21\implies y=-3$

Then back in the second equation we find

$x=2(-3)+2=-6+2=-4$

So (-4, -3) is the only solution here.

6. (by substitution) Notice that the left hand sides of both equations are the same, so we end up with 7 = 12, but this is false, so no solution exists.

Related Questions

Bryan has a summer job of unloading fruit crates. Last week he unloaded 243 crates. This week he unloaded 361. How many more did Bryan unload this week than last week?
The new number, 200, is 400 less than the original number. What is the approximate percent change?
3/4 of Melissa's friends babysit for extra money. 2/3 of her friends babysit and pet sit. What fraction of those who babysit also pet sit?A) 1/2B) 1/4C) 12/17D) 8/9
The equation of the line of best fit of a scatter plot is y = 7x − 9. What is the slope of the equation?−9, −7, 7, 9
Solve for x.3(x)+10= 2x3+2x6

The veterinarian weighed Oliver’s new puppy, Boaz, on a defective scale. He weighed 36 pounds. However, Boaz weighs exactly 34.5 pounds. What is the percent of error in measurement of the defective scale to the nearest tenth?Please help me :)

Answers

Answer:

4.3

Step-by-step explanation:

If your rounding to the nearest tenth them its 4.3. Don't listen to any of the other answers. They keep giving wrong answers. I tried to put 4 in because thats what the people on brainly said but it said I was wrong. I clicked show answer and it said 4.3. So everyone reading this...... its 4.3!!

new amount - original amount = amount of change

amount of change/original amount × 100 = percent of change

-----------------------------------------------------------------------------

36 - 34.5 = 1.5

1.5/34.5 × 100 = 4%

Convert 65% percent into a fraction in simplest form

Answers

The fraction form of 65% is 13 / 20

What is fraction?

A fraction is a part of a whole number, and a way to split up a number into equal parts. It is written as the number of equal parts being counted, called the numerator, over the number of parts in the whole, called the denominator.

Given that, convert 65% percent into a fraction in the simplest form,

We know that,

a percentage is a number or ratio that can be expressed as a fraction of 100.

To change a percent to a fraction, put the percentage over 100 (after removing the % sign) and simplify if necessary.

65% = 65 / 100 = 13 / 20

Hence, the fraction form of 65% is 13 / 20

Learn more about fractions, click;

brainly.com/question/10354322

#SPJ5

Well write it in decimal form first : 65.0

Then divide it by 100 because when you make a decimal into a percent you multiply it by 100, so : 0.65.

Now put it in fraction form. *Remember the decimal places. Eg : tenths, hundreds* : 65/100

Now simplify *You can take away zeros too, but this doesn't share zeros so don't* : 65/100 -->13/20

13/20 is your fraction. Hope I helped! 13/20 = 65%

What is The approximate amount