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3 years ago

Write an expression that is equivalent to 2x2 - 2x + 7?

Mathematics

2 answers:

den301095 [7]3 years ago

4 0

Answer:

2x +7

Step-by-step explanation:

2x2 is multiplication , so u multiply ,minus the 2x would be 4x -2x , so it will give 2x + 7 as final asnwer

Natalija [7]3 years ago

4 0

Answer: 11-2x

We need to solve this using PEMDAS

P-Parentheses
E-exponents
M-multiplication
D-division
A-addition
A-subtraction

Let’s rewrite the equation

2•2-2x+7

The first thing we see here (in the order of PEMDAS) is multiplication. Let’s multiply 2•2

4-2x+7

The next thing we see here (in the order of PEMDAS) is addition. Let’s add 4 and 7.

11-2x

We cannot simplify this anymore since -2x has a variable with it. Your final equation will be 11-2x, which is still equivalent to your original expression.

Hope this helps comment below for more questions :)

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This rational expression is nonequivalent. 5x / 25x^4 ; x^3 / 5x^15 True or false?????

FromTheMoon [43]

It is nonequivalent. Figure it out this way. Think about what number has to be multiplied by both the numerator and the denominator of $\frac{5x}{25x^4}$ to get to $\frac{x^3}{5x^15}$ . It has to be the samee number for the one expression to be equivalent to the other. To get from 5x to x^3, we have to multiply by 1/5x^2. When we do that we get x^3. Good. Now we have to multiply the denominator by the same thing, 1/5x^2. $25x^4(\frac{1}{5}x^2)=5x^6$ . As you can see, they are not equivalent.

8 0

3 years ago

Read 2 more answers

Adding fractions 1/6+2/3=

mars1129 [50]

Answer:

$\frac{5}{6}$

$\frac{1}{6} + \frac{2}{3}$ is equivalent to $\frac{1}{6} + \frac{4}{6}$ .

This is because $\frac{2}{3}=\frac{4}{6}$

The rule is, in order to add fractions, your denominators must be equivalent. In other words, you must have the same denominator for both fractions.

Now what do we do? We add!

$\frac{1}{6} + \frac{4}{6} =\frac{5}{6}$

This is because 4 + 1 = 5.

Your answer is $\frac{5}{6}$ .

I hope this helps!

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3 years ago

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Bethany paid $408.75 for a pair of diamond stud earrings. The sale price was $375. What is the Percent of Sales Tax she paid for

9966 [12]

Answer:

She paid 9% of sales tax

Step-by-step explanation:

The sale price of diamond = $375

Let x be percent of sales tax

So, amount of tax = $x\% \times 375 = \frac{x}{100} \times 375 =3.75x$

So, Amount including tax = 375+3.75x

We are given that Bethany paid $408.75 for a pair of diamond stud earrings.

So, 375+3.75x=408.75

3.75x=408.75-375

$x=\frac{408.75-375}{3.75}$

x=9

Hence She paid 9% of sales tax

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3 years ago

Solve the following formula c=1/2f(q+b) for q

tensa zangetsu [6.8K]

Answer:q= (2C - fb)/f

Step-by-step explanation:

multiplying both sides by 2 we have,

2C = fb + fq,

subtract both sides by fb

fq = 2C - fb,

dividing both sides by f

q= (2C - fb)/f

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3 years ago

How to simplify -12 divided by 3•(-8+(-4) to the seccond power-6)+2

ehidna [41]

-12/3•(-8(-4)^2-6)+2 Original Equation
-12/3•(-8+16-6)+2 Simplify the (-4)^2
-12/3•(2)+2 Simplify everything inside the equation
-8+2 Using PEMDAS, you multiply -12/3•(2)
-6 You add from there

7 0

2 years ago