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3 years ago

3.27x+1.28y+1.83x−2.77y

Mathematics

1 answer:

Firdavs [7]3 years ago

8 0

Answer:

5.1x - 1.49y

Step-by-step explanation:

We need to add or substract like terms.

like terms are the terms that have the same variable, in this case:

3.27x and 1.83x are like terms, and adding them we get:

3.27x + 1.83x = 5.1x (you add only the coefficients and the x stays the same)

we do the same for the terms with 'y':

1.28y and −2.77y are like terms, but in this case we must substract because of the − sign:

1.28y −2.77y = -1.49y

the final answer is the conjunction of the two results that we obtained:

5.1x - 1.49y

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I need the answer to a and b

erica [24]

Answer:

a. x = 7

b. x = 36/5

Step-by-step explanation:

<u>Points to remember</u>

The ratio of of corresponding sides of similar triangles are equal.

<u>a). To find the value of x</u>

From the figure 1 we get two similar triangles, ΔABC and ADE

We can write,

AB/AD = AC/AE

3/6 = x/(x + 7)

3(x + 7) = 6 * x

3x + 21 = 6x

6x - 3x = 21

3x = 21

x = 21/3 = 7

<u>b). To find the value of x</u>

From the figure b we get

ΔABC ~ ΔEDF

AB/DE = BC/DF

4/5 = x/9

x = (4 * 9)/5 = 36/5

7 0

3 years ago

Tan2x=___

SSSSS [86.1K]

Step-by-step explanation:

tan2x = sin2x/cos2x

we know that ,

sin2x = 2sinxcosx
sin2x = 2sinxcosx cos2x = cos²x - sin²x

Since, tan2x = 2sinx*cosx/cos²x- sin²x

Dividing by cos²x in numerator and denominator.

We get ,

tan2x = 2sinx/cosx / 1- sin²x/cos²x

Since, we get tan2x= 2tanx/1-tan²x

Option (c) is correct option.

Hope it will be helpful

7 0

2 years ago

A line passes through (-6, 2) and (6, 6). What is the x-intercept and equation?

ivanzaharov [21]

Answer:

Equation: $y=\frac{1}{3} x+4$

X-Intercept:<em> -12 </em>(set y equal to 0 in your equation)

4 0

3 years ago

For the first 2 home football games, the concession stand sold a total of 70 hamburgers. How many hamburgers can they expect to

sasho [114]

Answer:

385 hamburgers.

Step-by-step explanation:

So the data they have given us is that there have been 2 home games, with 70 hamburgers sold. If we divide the number of hamburgers sold by the number of games (70/2), we come up with the average hamburgers sold per game, which is 35. We can use an equation to find the amount of hamburgers sold for every x amount of games. $h = 35x$ , with x being the amount of games, and h being the total amount of hamburgers. If you plug in 11 for x, you will get 385.