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3 years ago

5x + 3 = 7x – 1. Find x a. 1/3 b. ½ c. 1 d. 2

Mathematics

1 answer:

weqwewe [10]3 years ago

3 0

Answer:

Step-by-step explanation:

First you need to get like items on the same side(put the variables on one side and the non-variables on the other). Remember anything you do on one side of the equal, you have to do on the other side, too.

5X+3=7X-1 I'm going to move the -1 first, but you don't have to as long as you keep the equation equal.

5X+3+1=7X-1+1 We know that +1-1 is zero and so is -1+1. So

5X+3+1=7X We don't need to keep that zero.

5X+4=7X Now, we want to move the 5X over.

5X-5X+4=7X-5X Simplify and get rid of the zero.

4=2X Last, we have to divide to get the 2 away from the X.

4/2=2X/2 Not everyone know that slash mean divide, :-).

2=X

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Choose the property of addition that justifies the equation<br><br> 9+2=2+9

Alenkasestr [34]

Answer:

Communitive Property

Step-by-step explanation:

Communitive property is when you switch up numbers when you multiply and add but it's still the same.

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3 years ago

AB has coordinates A(-5,9) and B(7,- 7). Points P, Q, and I are collinear

VMariaS [17]

Answer:

$\overline{QT}$

Step-by-step explanation:

We want to find the coordinates of a certain point C(x,y) such that C divides $A(x_1,y_1)$ and $B(x_2,y_2)$ in the ratio m:n=3:2

The x-coordinate is given by:

$x=\frac{mx_2+nx_1}{m+n}$

The y-coordinate is given by:

$y=\frac{my_2+ny_1}{m+n}$

AB has coordinates A(-5,9) and B(7,- 7)

We substitute the values to get:

$x=\frac{3*7+2*-5}{3+2}$

$x=\frac{21-10}{5}$

$x=\frac{11}{5}$

and

$y=\frac{3*-7+2*9}{3+2}$

$y=\frac{-21+18}{5}$

$y=-\frac{3}{5}$

Therefore C has coordinates $(\frac{11}{5},-\frac{3}{5})$

The line segment that contains C is $\overline{QT}$

See attachment.

6 0

3 years ago

Jada rode her bike at a constant speed for 3 hours. During that time, she traveled 7.2 miles. What was Jada's riding speed?

NeTakaya

Answer: 2.4 miles per hour

Step-by-step explanation: just do 7.2/3=2.4

or another way you could do this is do 2.4 x 3=7.2

3 0

3 years ago

Which expression is equivalent to (-2)(a+6)

Eva8 [605]

The equivalent answer to this expression is found by using the distributive property.
(-2a - 12)
Simply multiply the negative 2 into the second parenthesis.

3 0

3 years ago

L is between M and N. If NL = 5x, LM = 3x, and NL = 15, find x.

Leona [35]

Answer:

x = 5

Step-by-step explanation:

Given that,

NL = 5x, LM = 3x, and NL = 15

L is between M and N.

To find,

The value of x.

Solution,

It is mentioned that, L is between M and N. So,

LM = LN

Put all the values,

3x = 15

⇒ x = 5

So, the value of x is equal to 5.

Reference,

brainly.com/question/19871240

6 0

3 years ago