All categories

3 years ago

What is the solution to this equation? 7x + 3 = 10x - 5.4

Mathematics

1 answer:

stich3 [128]3 years ago

7 0

Answer:

$x=2.8$

Step-by-step explanation:

$7x+3=10x-5.4$

Subtract 3 from both sides:

$7x+3-3=10x-5.4-3$

$7x=10x-8.4$

Subtract 10x from both sides:

$7x-10x=10x-8.4-10x$

$-3x=-8.4$

Divide both sides by -3:

$\frac{-3x}{-3}=\frac{-8.4}{-3}$

$x=2.8$

You might be interested in

Can someone help me pls!!!

Cerrena [4.2K]

Answer:

First one: Function

Second one: not a function (a function cannot have two outputs)

Third one: Function

Last one: Not a function (doesn't pass vertical line test)

Step-by-step explanation:

Hope it helps!

6 0

2 years ago

Read 2 more answers

Which of the following are solutions to the equation below (5x+1)^2=7?<br><br> Check all that apply.

stiv31 [10]

(5x+1)² = 7; expand: 25x² + 10x +1 = 7 or 25x² + 10x -6 = 0

Solve this quadratic for x:

x = [-b + √(b² - 4ac)]/2a and x = [-b - √(b² - 4ac)]/2a
Plug the values and you'll find :
x = (- √7 - 1)/5 (answer C)
x = (+√7 -1)/5 (answer E)

4 0

2 years ago

Read 2 more answers

Help please anyone thank you

vampirchik [111]

Answer:

true

Step-by-step explanation:

the line is going down. if it was positive then it would be going from left all to right going up.

7 0

2 years ago

Read 2 more answers

There are 12 inches in 1 foot and 5,280 feet in 1 mile. if Elena ran 2-1/2 miles. How many feet is that ?

lapo4ka [179]

Answer:

$13,200\ ft$

Step-by-step explanation:

we know that

1 mile=5,280 feet

we have that

Elena ran 2-1/2 miles

<em>Convert mixed number to an improper fraction</em>

$2\frac{1}{2}\ mi=\frac{2*2+1}{2}=\frac{5}{2}\ mi$

Convert miles to feet

$\frac{5}{2}\ mi=\frac{5}{2}(5,280)=13,200\ ft$

8 0

3 years ago

Use the figure to find the measures of the numbered angles.

Elena L [17]

Step-by-step explanation:

∠5 = 49⁰

∠6 = 131⁰

Mark it brainliest if it helps you ❤️

5 0

2 years ago