1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
8090 [49]
3 years ago
8

Evaluate this expression for x=2 and y=5.

Mathematics
1 answer:
bija089 [108]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Substitute the given values for x and y into the expression

\frac{20}{5} - \frac{8}{2} + \frac{3(2)(5)}{2+5}

= 4 - 4 + \frac{30}{7}

= 0 + \frac{30}{7}

= \frac{30}{7} = 4 \frac{2}{7}

You might be interested in
A) Write ²
I am Lyosha [343]

Answer:

see explanation

Step-by-step explanation:

(a)

x² - 2x - 4

using the method of completing the square

add/subtract ( half the coefficient of the x- term )² to x² - 2x

= x² + 2(- 1)x + 1 - 1 - 4

= (x - 1)² - 5

with c = - 1 and d = - 5

(b)

x² - 2x - 4 = 0 ← using result from (a) , that is

(x - 1)² - 5 = 0 ( add 5 to both sides )

(x - 1)² = 5 ( take the square root of both sides )

x - 1 = ± \sqrt{5} ( add 1 to both sides )

x = 1 ± \sqrt{5}

5 0
2 years ago
PLS ANSWER DUE LATER TODAY!!!
Readme [11.4K]

Answer:

1) y= 2x-4

2) y= 2/3 - 3

3) y=1/2x+2

4) y=-4x-4

Step-by-step explanation:

all you basically has to do is is subtract the x to isolate the y and if the y and if the y still has a number by it you use it to decide it

6 0
3 years ago
Find the total surface area of the rectangular prism
Mkey [24]

Answer:

124

Step-by-step explanation:

To find the surface area, we add the area from all faces or the prism.

the first face, we can put 8 times 2.5, which is 20. There are two of these faces, so we have 40 in our area so far.

next the other face. 4  times 2.5 is 10, and there are two of these faces. 60 in out area.

now the top and bottom faces. 8 times 4 is 32. there are two of these faces, and 60 +64 = 124

4 0
3 years ago
|3x-1|=4 help pleaseeeeeeeeee
FrozenT [24]

Answer: x = -1 or x = 5/3

Step-by-step explanation:

|3x - 1| = 4

=> 3x - 1 = 4 or 3x - 1 = -4

=>x = 5/3 or x = -1

7 0
2 years ago
Jesse needs 18 cups of flour to make 78 pancakes. How many pancakes can Jesse make with 12 cups of flour
Alex_Xolod [135]

18 : 78 = 12 : x

x = (78 * 12) : 18

x = 936 : 18

x = 52


52 is your answer

------------------------------

18 : 78 = 12 : 52

0.23 = 0.23

the answer is good


4 0
3 years ago
Other questions:
  • 4 cups of pineapple juice, 8 cups of orange juice and 12 cups of Sprite makes 18 servings. How many cups of pineapple juice will
    11·1 answer
  • What is 8,236 rounded by tenths?
    14·2 answers
  • It takes 2/3 of a yard of fabric to make a pillow case how many pillowcases can be made from 16 yards of fabric?
    14·2 answers
  • If f(x)=3x-2 and g(x)=2x+1 find(f-g)(x)
    14·1 answer
  • -3/4f = 5/4<br><br> F = ?<br><br> Answer faaast
    13·1 answer
  • the first box is divide/ multiply the second is height/base and the third is divide/multiply the fourth is the base/ 2 / the ar
    7·1 answer
  • 1 point
    7·2 answers
  • The area of a sector of an circle of a radius 5 cm, formed by an arc of length is 3.5cm. what is the answer
    15·1 answer
  • Determine the values of X, Y and Z on the following number line:<br> HH<br> X -11 Y 9 Z
    6·1 answer
  • Calculate the average (arithmetic mean) of the list of numbers shown in the table. (rounded to the nearest tenth) A) 35.2 B) 39.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!