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aliina [53]
3 years ago
11

Which expression is equivalent to this polynomial? 6x2 + 10x − 56=

Mathematics
2 answers:
Semmy [17]3 years ago
7 0

Step-by-step explanation:

A 4x - 16 - 6x2 - 6x + 40

Solving like terms

-6x2 - 2x + 24

B 3x2 + 5x - 28 + 3x2 - 5x - 28

Solving like terms

6x2 - 64

C 4x - 16 + 6x2 + 6x - 40

Solving like terms

6x2 + 10x - 56

Option C is the correct answer

hammer [34]3 years ago
4 0
2nd one maybe I’m not to sure srry
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HELP NOW PLEASE brainlest and 20 points
ki77a [65]
First one is A
second one is C
5 0
3 years ago
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Renee calculated 3/6 plus 2/4 and said the answer equaled 5/10. Amanda solved the same problem and said the answer equaled one w
Yuliya22 [10]

Answer:

Amanda's

Step-by-step explanation:

Given :

3/6 + 2/4

The L. C. M of 6 and 4 = 12

(6 + 6) / 12

12 / 12

= 1

Renne's result = 5/10

Amanda's result = 1 whole

Hence, Amanda's result makes more sense.

5 0
3 years ago
What is the coefficient in the inequality 3x=10?
brilliants [131]

Answer:

3.3333333333333333333333333333333

Step-by-step explanation:

so u do 10 divided by 3 =3.333333333333333333333333.

x = what i said

7 0
3 years ago
Please do question 4 and 5 only. <br><br> I will mark brainliest to well explained answers.
Eva8 [605]
4) D
5) 19d

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7 0
3 years ago
Noah is buying a pair of jeans and using a coupon for 10%off. The total price is $56.70 which includes $2.70 in sales tax. Noah’
lora16 [44]

Answer:

See below.

Step-by-step explanation:

So, we know that Noah's purchase can be modeled by the equation:

x-0.1x+2.70=56.70

Part 1)

The solution to the equation will be the value of x.

In this case, x will represent the original price of the jeans.

We know that Noah has a coupon for 10% off the <em>original price of the jeans</em>.

So, 0.1x will represent how much of the original price Noah gets a a discount on.

Therefore, (x - 0.1x) represents the total cost of the jeans <em>after</em> the coupon.

So, x is our original price of the jeans.

Part 2)

To verify that 70 is <em>not</em> a solution, we can simply substitute 70 for x and check whether or not the equation is true. So:

(70)-0.1(70)+2.7\stackrel{?}{=}56.70

Multiply:

70-7+2.7\stackrel{?}{=}56.7

Subtract:

63+2.7\stackrel{?}{=}56.7

Add:

65.7\neq56.7

However, we <em>can</em> verify that 60 <em>is</em> the solution by substituting. So, substitute 60 for every x:

(60)-0.1(60)+2.7\stackrel{?}{=}5.7

Multiply:

60-6+2.7\stackrel{?}{=}56.7

Subtract:

54+2.7\stackrel{?}{=}56.7

Add:

56.7\stackrel{\checkmark}{=}56.7

So, 60 is indeed the solution and is the value of x.

So, this means that $60 was the original price of the jeans.

8 0
3 years ago
Read 2 more answers
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