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2 years ago

What is the expression equivalent too?

Mathematics

1 answer:

steposvetlana [31]2 years ago

7 0

Answer:

x+5

Step-by-step explanation:

3(x+4)-(2x+7)

1. Distribute 3 to x and 4

3x+12-2x+7

2. Distribute the "-" to 2x and 7

2x+12-2x-7

3. Subtract 7 from 12

3x+12-2x-7

3x+5-2x

4. Combine like terms

3x+5-2x

1x+5

Answer:

x+5

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PART A: APPLICATION (10 marks)

Lelu [443]

Answer:

Jerry's weight is 36kg and tom's weight is 66kg

Step-by-step explanation:

According to the given condition:

Let,tom's weight =x

Jerry's weight=y

So,

X=2y-6 ---(1)

X+y=102-----(2)

Put value of x from eq 1 in 2

2y-6+y=102

3y-6=102

3y=102+6

3y=108

Y=108/3=36

Jerry's weight is 36.

Put value of y in eq 1

X= 2(36) -6

X=72-6

X=66

So, Tom's weight is 66kg

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2 years ago

The percentages of voters classed as Liberals in three different election districts are divided as follows: in the first distric

ASHA 777 [7]

Answer:

47%

Step-by-step explanation:

Chance of liberal in first district = 21%

Chance of liberal in second district = 45%

Chance of liberal in third district = 75%

Assuming that all districts are equally likely to be selected, the probability that a randomly selected voter is a liberal is given by the average of the probability of a voter being a liberal in each district:

$P = \frac{0.21+0.45+0.75}{3}= 47\%$

The probability that she will be a Liberal is 47%.

8 0

2 years ago

Is this a quadrilateral?

Pepsi [2]

A quadrilateral is a 4-sided figure. so yes, i'd say that is a quadrilateral

4 0

3 years ago

Read 2 more answers

How to find the general solution to y"'+2y"-4y'-8y=0?

S_A_V [24]

$y'''+2y''-4y'-8y=0$

has characteristic equation

$r^3+2r^2-4r-8=r^2(r+2)-4(r+2)=(r^2-4)(r+2)=(r-2)(r+2)^2=0$

which has roots at $r=\pm2$ . The negative root has multiplicity 2. So the general solution is

$y=C_1e^{2x}+C_2e^{-2x}+C_3xe^{-2x}$

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3 years ago

John's father is 2 m tall how many centimeters is John's father (please let me know!)<br>

Eddi Din [679]

There are 100 cm in a meter, so John's father would be 200 cm tall.

5 0

3 years ago