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2 years ago

How to turn y=7x-3 into standard form

Mathematics

2 answers:

pishuonlain [190]2 years ago

7 0

Answer:

7x-y=3

Step-by-step explanation:

that is what this guy said online

anyanavicka [17]2 years ago

6 0

Answer:

$7x-y=3$

Step-by-step explanation:

The standard form of a linear equation is $Ax+By=C$ .

Rewrite the equation with the sides flipped.

$7x-3=y$

Move all terms containing variables to the left side of the equation.

Subtract $y$ from both sides of the equation.

$7x-3-y=0$

Move $-3$ .

$7x-y-3=0$

Add $3$ to both sides of the equation.

$\bold{7x-y=3}$

$\mathrm{Therefore,\:}y=7x-3\: \mathrm{in\:standard\:form\:is}\:7x - y = 3$

Terms:

<u>Linear equation</u>

An equation whose graph is a line, that is, an equation that has a degree of one.

<u>Terms</u>

Any expression written as a product or quotient.

<u>Variable</u>

A letter used to represent a number value in an expression or an equation.

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how high up a vertical wall will a 26-foot-long extension ladder reach if its base is placed 10 feet away from the wall

allsm [11]

Answer:

24ft high

Step-by-step explanation:

Assuming the wall is perpendicular to the ground (so that it forms a right angle, and that when the ladder is placed on the ground and leaned up against the wall that it forms a right triangle), we can use the Pythagorean Theorem to describe the situation mathematically.

<h3><u>The Pythagorean Theorem</u></h3>

For any right triangle (a triangle that has a right angle) the Pythagorean Theorem applies. The Pythagorean Theorem describes the relationship between side lengths as $a^2+b^2=c^2$ , where "c" is the length of the "hypotenuse" (the side across from the right angle), and "a" and "b" are the lengths of the "legs" (the other two sides that are touching the right angle). Since addition is commutative, it doesn't matter which leg you pick for side "a" or side "b", it only matters that the hypotenuse must be "c".

Given that the ladder is across from the right angle (the angle formed by the wall and the ground... the two "legs"), the ladder represents the hypotenuse in this situation.

<h3><u>Substituting known values, and solving the equation</u></h3><h3> $a^2+b^2=c^2$ </h3>

Substitute known values, and simplify...

$a^2+(10)^2=(26)^2$

$a^2+100=676$

Subtract 100 from both sides...

$(a^2+100)-100=(676)-100$

$a^2=576$

Apply the square root property...

$\sqrt{a^2}=\pm \sqrt{576}$

$a=\pm 24$

$a=24$ or $a=- 24$

Since the distance height the ladder will reach is not a negative number, we reject the negative solution. Hence, the ladder will reach 24ft high, if placed 10ft from the base of the wall.

8 0

2 years ago

The year book club has a meeting. The meeting has 30 people , which is two thirds of the club. How many people are in the club?

Pepsi [2]

Answer: 45

Step-by-step explanation:

30 times (3/2)

30 times 3 equals 90.

90 divided 2 equals 45.

5 0

4 years ago

Read 2 more answers