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Nady [450]
4 years ago
9

Write an expression equivalent to 6 - 2x + 5 + 4x that only has two terms.

Mathematics
1 answer:
777dan777 [17]4 years ago
3 0

Answer:

11 + 2x

Step-by-step explanation:

In algebra, like terms are terms that have the same variables (letter after the number). Like terms can be combined for example the 6 and 5 have the same variable (none) so they can be combined. IMPORTANT! While we do combine the 2x and the 4x since the 2x came after a minus sign we consider it a negative, so -2x + 4x (or 4x - 2x) is 2x NOT 6x

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Given the proportion a/b=12/19 which ratio completes the equivalent proportion a/12=?
Hitman42 [59]
\bf \cfrac{12}{19}=\cfrac{a}{12}  solve for "x"
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3 years ago
Find the unit rate:<br> You score 35 points in<br> seven basketball games
MatroZZZ [7]

Answer:

5 points per game

Step-by-step explanation:

35/7 = 5

6 0
3 years ago
Find the area of the shape ​
defon

Answer:

15 units squared

Step-by-step explanation:

Area of a trapezium is half the sum of the parallel sides times the distance between them

So A=0.5×(7+3)×3

A=15

6 0
3 years ago
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In a multiple regression model involving 44 observations, the following estimated regression equation was obtained. Ŷ = 29 + 18x
icang [17]

Answer: D. .400

Step-by-step explanation:

Given : In a multiple regression model involving 44 observations, the following estimated regression equation was obtained.

\hat{Y}= 29 + 18x_1 + 43x_2 + 87x_3

For this model,

Regression sum of squares =SSR = 600

and Sum of squares due to error =SSE = 400.

Total sum of squares = SST= SSR+SSE

SST= 600+400=1000

The multiple coefficient of determination is given by :-

R^2=1-\dfrac{SSR}{SST}

Substitute values , we get

R^2=1-\dfrac{600}{1000}

R^2=1-0.600=0.400

Thus, the multiple coefficient of determination for the above model is R^2=0.400

Hence, the correct answer is D. .400.

3 0
3 years ago
Sophia determined that the expression Negative (4 x minus 5) + 2 (x minus 3) is equivalent to –2x – 5 by using the steps below.
strojnjashka [21]

Answer:

She is not correct because she did not substitute the same number in both expressions in Step 1

Step-by-step explanation:

CASE 1: substitute 1 for x  to both sides of the equations

L.H.S

-(4x-5)+2(x-3)

-(4 (1) - 5)+ 2(1-3) = - (-1) + 2(-2) = 1 - 4 = -3

R.H.S

-2x - 5

-2(1) - 5 = -2-5 = -7

Hence for x= 1

-(4x-5)+2(x-3) ≠ -2x -5

Because -3 ≠ -7

CASE 2: substitute -1 for x  to both sides of the equations

L.H.S

-(4x-5)+2(x-3)

-(4 (-1) - 5)+ 2(-1-3) = - (-9) + 2(-4) = 9 - 8 = 1

R.H.S

-2x - 5

-2(-1) - 5 = 2-5 = -3

Hence for x= -1

-(4x-5)+2(x-3) ≠ -2x -5

Because 1 ≠ -3

Answer:

She is not correct because she did not substitute the same number in both expressions in Step 1

6 0
3 years ago
Read 2 more answers
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