Factor completely 3x^2 +2x +1

How to solve 4y=x 3x- y=70 using substitution

creativ13 [48]

X = 4y
3x - y = 70

substitute the x in the second equation with the other half of the first equation.

3(4y) - y = 70
12y - y = 70
11y = 70
y = 6.36 repeating, or 6 4/11

now use this to solve first equation
x = 4 (6 4/11)
x = 25.45 repeating

done

7 0

3 years ago

A driveway has an area of 96 square feet. The width of the driveway is 8 feet.

Mrrafil [7]

Answer:

12 feet

Step-by-step explanation:

A driveway is rectangular in shape.

Therefore we can calculate the area using the formula;

$A = L \times W$

From the question;

The area,A=96 feet square

The width, W=8 feet

We substitute this values into the formula to find the length, L.

This implies that

$96 =L \times 8$

Dividing through by 8.

$\implies \frac{96}{8}= \frac{L \times 8}{8}$

$\implies L = 12$

Hence,the length of the driveway is 12 feet.

4 0

3 years ago

Guys we have a big test tomorrow, and it is about angles and fractions and I just need someone to refresh my brain. Just answer

pishuonlain [190]

A right angle measures an angle exactly 90 degrees, obtuse= more than 90, acute less than 90 degrees. Triangle angles add up to 180 degrees quadrilaterals measure up to 360 degrees. A fraction can be written as a decimal or percent answer. A fraction is not a whole number. The reciprocal is the opposite of that number/ fraction. Pls give brainliest.

7 0

3 years ago

Help me pleas. You might have to zoom in on the picture to see better.

Ivanshal [37]

Answer:

1/2, -1/8, 1/32

Step-by-step explanation:

$- 2( - \frac{1}{4} ) = \frac{1}{2}$