All categories

3 years ago

Evaluate the expression -8x + 5 - 2x - 4 + 5x when x = 2 before and after simplifying.

Mathematics

2 answers:

umka2103 [35]3 years ago

7 0

Answer:

-9

Step-by-step explanation:

Alex777 [14]3 years ago

5 0

Answer:

Step-by-step explanation:

all we have to do is plug in 2 for x into the equation:

-8(2) + 5 -2(2) -4 + 5(2)

-16 + 5 -4 -4 + 10

-11 -8 + 10

-19 + 10

the answer is

-9

to simplify the equation we’ll combine like terms

-8x + 5 -2x -4 + 5x

-10x + 1 + 5x

-5x + 1

now we’ll plug in 2 for x

-5(2) + 1

-10 + 1

the answer is still

-9

You might be interested in

38. Emily is buying some graduation pictures. She pays $25 for the sitting and $15 for each

goldfiish [28.3K]

a. She pays $100 for 5 sheets

b. 25+15x dollars for x sheets

c. 8 sheets

Step-by-step explanation:

Given

Sitting cost = $25

Per sheet picture cost = $15

Let p be the number of sheets of pictures

Then the cost can be written as a function of p

$c(p) = 25+15p$

Now,

a. How much does she pay for 5 sheets of pictures?!

Putting p = 5 in the function

$c(5) = 25 + 15(5)\\= 25+75\\=100$

She will pay $100 for 5 sheets of pictures

b. How much does she pay for "x" sheets?

Putting x in place of p

$c(x) = 25+15x$

c. How many sheets can she buy for $145?

We know the cost now, we have to find p so,

$145 = 25+15p\\145-25 = 25+15p-25\\120 = 15p$

Dividing both sides by 15

$\frac{15p}{15} = \frac{120}{15}\\p = 8$

Hence,

She can buy 8 sheets for $145

Keywords: Linear equation, Algebraic functions

Learn more about functions at:

#LearnwithBrainly

5 0

3 years ago

A product of 9 and number plus one is 19. Write an equation?

Degger [83]

Answer:

9x + 1 = 19. hope this helps

Step-by-step explanation:

- Zombie

6 0

2 years ago

Read 2 more answers

Need help with number 26, multi-step!!

Rufina [12.5K]

Answer:

$204.11

Step-by-step explanation:

He is paying 70% of the original cost, so he is paying

269.99(0.7) = $188.99

He has to pay 8% sales tax on that discount price, so he pays

$188.99(0.08) = $15.12 tax

for a total of

$188.99 + $15.12 = $204.11

8 0

2 years ago

Select all equations that can represent the question: "How many groups of 45 are in 1?" A ?⋅1=45? Times 1 is equal to 4 fifths B

Aleonysh [2.5K]

This question is not correctly written.

Complete Question

Select all equations that can represent the question: "How many groups of 4/5 are in 1?" A ?⋅1=4/5? Times 1 is equal to 4 fifths B 1⋅4/5=?1 times 4 fifths is equal to ? C 4/5÷1=?4 fifths divided by 1 is equal to ? D ?⋅4/5=1? Times 4 fifths is equal to 1 E 1÷4/5=?1 divided by 4 fifths is equal to ?

Answer:

D ?⋅4/5=1 = ? Times 4 fifths is equal to

E 1÷4/5=? = 1 divided by 4 fifths is equal to

Step-by-step explanation:

How many groups of 4/5 are in 1?

The operation used to solve this is that Division operation.

Hence, we solve it by saying:

1 ÷ 4/5 = ?

= 1× 5/4 = ?

5/4 = ?

Cross Multiply

5 = 4 × ?

? = 5/4

The equations that can represent the question: is

Option D ?⋅4/5=1 = ? Times 4 fifths is equal to

Option E 1÷4/5=? = 1 divided by 4 fifths is equal to

7 0

2 years ago

0 류 In + 0 4 1 6 1 Which fraction is equal to 좋

Diano4ka-milaya [45]

Answer:

B = 6/8

Step-by-step explanation:

3 x 2 = 6

____ __

4 x 2 8

(Equivalent fraction)

5 0

2 years ago