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ollegr [7]
3 years ago
5

Solve the following equation. 2(x+2)−4x=8 Question 1 options: x=−2 x=3 x=−3 x=1

Mathematics
1 answer:
Tanya [424]3 years ago
7 0

Step-by-step explanation:

2(x + 2) - 4x = 8

2x + 4 - 4x = 8

2x - 4x = 8 - 4

-2x = 4

x = 4/-2

x = -2

Option → A

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What is 456+1290????
Arisa [49]

Answer:

1846

Step-by-step explanation:

1290+456

3 0
4 years ago
Read 2 more answers
8. 6r + 5 = 4 6 - 7y -20 ​
Rudiy27

Answer: r=-7/6y+7/2

Step-by-step explanation:

Step 1: Add -5 to both sides.

6r+5+−5=−7y+26+−5

6r=−7y+21

Step 2: Divide both sides by 6.

6r/6=-7y+21/6

3 0
3 years ago
A small motorboat travels 8mph in still water. It takes 3 hours longer to travel 44 miles going upstream than it does going down
Eddi Din [679]

The rate of the current is 2.03 mph if the small motorboat travels 8mph in still water. It takes 3 hours longer to travel 44 miles going upstream than it does going downstream.

<h3>What is a quadratic equation?</h3>

Any equation of the form \rm ax^2+bx+c=0  Where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.

Let's suppose the rate of the current  = r

The time it takes to go downstream + 4 hours   = time to go upstream

As we know the:

\rm   Time = \dfrac{Distance}{  Rate }

Now,

\rm \dfrac{44}{ (8 + r)}  + 3   =  \dfrac{44}{ (8 - r)}

After solving:

\rm   \dfrac{44}{ (8 - r)}-\dfrac{44}{ (8 + r)}    =3

After cross multiplication

44(8+r) - 44(8-r) = 3(8+r)(8-r)

88r = 3(64 - r²)

3r² + 88r - 192 = 0

After solving the above quadratic equation, we get:

r = 2.03 or

r=−31.37 (reject as it is negative)

So, the r  =2.03 mph

Thus, the rate of the current is 2.03 mph if the small motorboat travels 8mph in still water. It takes 3 hours longer to travel 44 miles going upstream than it does going downstream.

Learn more about quadratic equations here:

brainly.com/question/2263981

#SPJ1

3 0
3 years ago
Find the perimeter of the polygon with the vertices A (-1,5), B (-1,-4), C (-6,-4), and D (-6,5)
ch4aika [34]

68

Schools almost over, good luck!!

5 0
3 years ago
convert 13542 base six to base ten. I'm in math20 at Folsom Lake College and i'm trying to figure out this question. I had most
VikaD [51]
Converting to base 10 can be done easily by writing a sort of digit expansion. In base 6, this number literally means

13542_6=1\times6^4+3\times6^3+5\times6^2+4\times6^1+2\times6^0

Simplifying this gives the value in base 10.

13542_6=1296+3\times216+5\times36+4\times6+2
13542_6=2150_{10}
6 0
4 years ago
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