All categories

3 years ago

Evaluate the expression when x = –12. 3x – 17 a. –53 b. –19 c. 19 d. 53

Mathematics

1 answer:

Angelina_Jolie [31]3 years ago

3 0

3 * -12 - 17 = 3 * -12 = -36 -36 - 17 = -53 Answer = A

You might be interested in

Solve for s. S + 3s - 4 = 16 S = Submit

const2013 [10]

The answer is 5 because 16+4=20 and 3s + s = 4s so you’re left with 4s = 20 and I know that 4 times 5 is 20.
ANSWER: S=5

3 0

3 years ago

Solve the system of equations. 3x – 4y = 8 18x – 5y = 10 x= y =

Zepler [3.9K]

Answer:

Step-by-step explanation:

Solution by substitution method

3x-4y=8

and 18x-5y=10

Suppose,

3x-4y=8→(1)

and 18x-5y=10→(2)

Taking equation (1), we have

3x-4y=8

⇒3x=4y+8

⇒x=( 4y+8)/ 3 →(3)

Putting x= (4y+8 )/3 in equation (2), we get

18x-5y=10

18( (4y+8) /3) -5y=10

⇒24y+48-5y=10

⇒19y+48=10

⇒19y=10-48

⇒19y= -38

⇒y=- 38 /19

⇒y= -2→(4)

Now, Putting y=-2 in equation (3), we get

x=4y+8

x= (4(-2)+8) /3

⇒x= (-8+8)/ 3

⇒x= 0/ 3

⇒x=0

∴x=0 and y= -2

5 0

3 years ago

I seriously need help with this. I pay attention in class it's just so confusing!! I'm giving extra points. Now 15. Please tell

brilliants [131]

Answer:

Step-by-step explanation:

Its D because A is all 90 degrees

Not C because all 90

8 0

3 years ago

A container has 12 and 3/4 cups of lemonade .asher gives each of his classmates 7/8 of a cup of lemonade . He gives away all of

Agata [3.3K]

Asher gave lemonade to 14 students

Solution:

Given that, A container has 12 and $\frac{3}{4}$ cups of lemonade

Asher gives each of his classmates $\frac{7}{8}$ of a cup of lemonade

To find: Number of classmates received the lemonade

From given question,

Total cups of lemonade = $12\frac{3}{4}$

$\rightarrow 12\frac{3}{4} = \frac{4 \times 12 + 3}{4} = \frac{51}{4}$

cups of lemonade received by each classmate = $\frac{7}{8}$

Thus, number of classmates received the lemonade can be found by dividing total cups of lemonade by cups of lemonade received by each classmate

$\rightarrow \frac{\frac{51}{4}}{\frac{7}{8}}=\frac{51}{4} \times \frac{8}{7}$

$\rightarrow 14.57$

Thus Asher gave lemonade to 14 students

3 0

3 years ago

Four times a difference of 17 and a number is 84.

hichkok12 [17]

4×17-x=84
68-x=84
-x=16
x=-16

5 0

3 years ago