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
Yuri [45]
3 years ago
8

6. 2x+(-4)y (if x = -4 and y=-2) Evaluate each expression using the variable replacement

Mathematics
2 answers:
aleksandr82 [10.1K]3 years ago
8 0

Answer:

-4

Step-by-step explanation:

( 2 * - 2 ) + ( -4 * - 2 )

= -4 + 8

= -4

ASHA 777 [7]3 years ago
3 0

Answer:

-4

Step-by-step explanation:

(2)(-2)+(-4)(-2)

=(-4) + 8

= (-4)

You might be interested in
What is the constant of variation,k, of the direct variation,y=kx,through (5,8)
grigory [225]

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form \frac{y}{x}=k or y=kx

where

k is the constant of variation

in this problem we have

the point (5,8)

so

x=5\\y=8

substitute

\frac{y}{x}=k

\frac{8}{5}=k

therefore

<u>the answer is</u>

k=\frac{8}{5}

8 0
4 years ago
Read 2 more answers
Given two vectors A=2i+3j+4k,B=i-2j+3k find the magnitude and direction of sum<br>(physics question)
Law Incorporation [45]

Answer:

Magnitude =\sqrt{59} \\\\Direction \: of \: \overrightarrow{A + B} = \frac{3}{\sqrt {59}} , \:\frac{1}{\sqrt {59}} , \:\frac{7}{\sqrt {59}}

Step-by-step explanation:

A=2i+3j+4k

B=i-2j+3k

Sum of the vectors:

A + B = 2i+3j+4k + i-2j+3k = 3i + j + 7k

Magnitude =\sqrt{3^2 + 1^2+ 7^2} \\\\Magnitude =\sqrt{9+1+49} \\\\Magnitude =\sqrt{59}

Direction of the sum of the vectors:

\widehat{A + B} =\frac{\overrightarrow{A + B}}{Magnitude\: of \:\overrightarrow{A + B}} \\\\\widehat{A + B} =\frac{3i + j + 7k}{\sqrt {59}} \\\\\widehat{A + B} =\frac{3}{\sqrt {59}} i +\frac{1}{\sqrt {59}} j+\frac{7}{\sqrt {59}} k\\\\Direction \: of \: \overrightarrow{A + B} = \frac{3}{\sqrt {59}} , \:\frac{1}{\sqrt {59}} , \:\frac{7}{\sqrt {59}} \\\\

3 0
2 years ago
Esmerelda flips a coin and draws a card. What is the possibility that she gets “heads” and a black card?
elena55 [62]
The possibility of flipping heads is 1 in 2 (1/2)
the possibility of pulling a black card is 26 in 52 (26/52) which equals 1 in 2 (1/2)
multiply those together and you get 1 in 4, 1/4, or a 25%
7 0
2 years ago
Read 2 more answers
What is 1/3 +1/4 equal in math
defon
The answer to your question would be 7/12 I hope I answered your question today!
7 0
3 years ago
Read 2 more answers
If 9/10 of cats prefer felix food of the total 500 surveyed,how many do NOT prefer felix
gregori [183]

Answer:

450 cats do NOT prefer felix

Step-by-step explanation:

9/10= x/500

6 0
3 years ago
Other questions:
  • 4. Given the points M(-3, -4) and T(5,0), find the coordinates of the point Q on directed line segment MT that partitions MT in
    15·1 answer
  • Write a number in each box to make the sentences true
    7·1 answer
  • which statement could be used to explain why f(x) = 2x – 3 has an inverse relation that is a function? a. the graph of f(x) pass
    7·2 answers
  • "solve the following system of linear equations using substitution." y=-6x and 4x+5y=52
    10·1 answer
  • 660 is 10 times as much as 600 true or false
    5·1 answer
  • Bryan started to evaluate a decimal expression. 2.5(42 ÷ 3.2 – 10(0.2) + 3)– 5.2 2.5(16 ÷ 3.2 – 10(0.2) + 3) – 5.2 What should B
    5·2 answers
  • What is a common denominator for 1/7 and 1/3?<br><br> a 18<br> b 21<br> c 3<br> d 4
    5·1 answer
  • Please answer these questions! If they are all right you get brainliest :)
    11·1 answer
  • Describe the association for this scatterplot.
    13·2 answers
  • An economy package of cups has 840 green cups. If the green cups are 40% of the total package, how many cups are in the package?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!