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Naily [24]
3 years ago
8

which of the following expressions is equivalent to 3a-2ax4a+6a? (a) 4a^2+6a (b)3a-20a^2 (c) 9a-8a^2 (d) a^2

Mathematics
1 answer:
lianna [129]3 years ago
4 0

Answer:

\boxed{\sf (c) \ 9a - 8 {a}^{2}}

Step-by-step explanation:

\sf Simplify  \: the \:  following: \\  \sf \implies 3a - 2a \times 4a + 6a \\  \\  \sf  - 2a \times 4a =  - 2 {a}^{2} \times 4  :  \\  \sf  \implies  \boxed{ \sf - 2 {a}^{2}  \times 4} + 3a + 6a \\  \\  \sf  - 2 \times 4 =  - 8 :  \\  \sf \implies   \boxed{ \sf- 8} {a}^{2}  + 3a + 6a \\  \\  \sf 3a + 6a = 9a :  \\  \sf \implies 9a - 8 {a}^{2}

You might be interested in
Drag each tile to the correct box.
wlad13 [49]

The correct match of each tile of the equation with its solution is:

  • n - 13 = - 12 →→→ 1
  • n/5 = -1/5  →→→ -1
  • n + 15 = - 10 →→→ -25

<h3>How do we match each tile to the correct box?</h3>

To match each tile to the correct box, we have to solve the arithmetic operations in the box, then drag the correct tile that matches our answer into the box.

From the image attached below;

1.

n - 13 = - 12

Let us add (+13) to both sides to eliminate (-13), i.e.

n - 13 + 13 = - 12 + 13

n = 1

2.

n/5 = -1/5  

multiply both side by 5

n/5 × (5) = -1/5 × (5)

n = -1

3.

n + 15 = - 10

n +15 - 15 = - 10 - 15

n = -25

Learn more about matching each tile to the correct box here:

brainly.com/question/17203448

#SPJ1

7 0
1 year ago
If a quantity increases by 25% and then decreases by 25%, will that result be the original quantity? Explain.
Helen [10]
It depends if its decreasing 25% of the original quantity or decreasing by 25% of the quanity that is after already increasing by 25%.
5 0
3 years ago
HURRY PLEASE
Delicious77 [7]

Answer:

Infinite solutions

Step-by-step explanation:

2x−7y=12 (1)

−x+3.5y=−6 (2)

(2) x = 3.5y + 6

(1) 2(3.5y+6) - 7y = 12

7y + 12 - 7y = 12

12 = 12 (a true statement)

Since the variable got eliminated and we got a true statement, the system has infinitely many solutions.

One of the solutions:

(6,0)

8 0
2 years ago
Read 2 more answers
PLZ HURRY IT'S URGENT!!!!!!!
klasskru [66]

I think it would be C but that’s just my opinion

7 0
3 years ago
Read 2 more answers
Help help help math please last one be honest
nadya68 [22]

Answer:

122 degrees

Step-by-step explanation:

The two intersecting lines are parallel for this problem, which means that the angle next to angle3 is the same degree measure as the one that is 58 degrees.

Also, remember that two angles next to each other on a straight line are supplementary, meaning that they add to 180 degrees.

When keeping these two things in mind, you can solve like this:

180 = angle3 + 58

180 - 58 = angle3

angle3 = 122

122 degrees

5 0
2 years ago
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