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3 years ago

Write the statement that represents 3 times the sum of 2 and 4"?

Mathematics

1 answer:

dsp733 years ago

6 0

Answer:

Step-by-step explanation:

according to the question expression can be written as

=3(2+4)

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Andre and Yazmeen leave at the same time and travel 75 miles to a fair. Andre drives 11 miles in 12 minutes. Yazmeen drives 26 m

coldgirl [10]

To get to know who will reach fast we need to compare the speed of Andre and Yazmeen.
speed=distance/time
Andre's speed will be:

Distance=11 miles
time=12 min
speed=11/12=0.92 miles/min

Yazmeen's speed:
distance=26 miles
time=24min
speed=26/24=1.08 miles/min

From above calculation we conclude that Yazmeen will reach first because she was traveling at a faster speed that Andre

6 0

3 years ago

Solve for x and y 1/(x+yi) + 2/(x-yi) = 1+i

aliina [53]

Answer:

Step-by-step explanation:

x+i*y≠0 ==> x≠0 and y≠0

x-i*y≠0 ==> x≠0 and y≠0

We must exclude (0,0) as solution.

$\dfrac{1}{x+i*y} +\dfrac{2}{x-i*y} =1+i\\\\\dfrac{1*(x-i*y)}{(x+i*y)(x-i*y)} +\dfrac{2*(x+i*y)}{(x-i*y)(x+i*y)} =1+i\\\\\\\dfrac{x-i*y+2x+2i*y}{x^2+y^2} =1+i\\\\3x+i*y=(1+i)(x^2+y^2)\\\\3x+i*y=(x^2+y^2)+i(x^2+y^2+i*(x^2+y^2)\\\\\left\{\begin{array}{ccc}3x&=&x^2+y^2\\y&=&x^2+y^2\\\end {array}\right.\\\\\\\left\{\begin{array}{ccc}y&=&3x\\3x&=&x^2+9x^2\\\end {array}\right.\\\\\\\left\{\begin{array}{ccc}y&=&3x\\x(10x-3)&=&0\\\end {array}\right.\\\\$

$\left\{\begin{array}{ccc}x&=&0\\y&=&0\\\end {array}\right.\ (to\ exclude) \ or \ \left\{\begin{array}{ccc}x&=&\dfrac{3}{10}\\\\y&=&\dfrac{9}{10}\\\end {array}\right.\\\\Sol=\{(\dfrac{3}{10},\dfrac{9}{10})\}\\$

4 0

3 years ago

Help please please pleaaaseeee explain answer

lord [1]

Answer:

Your answer will be B.) Both cabs cost $8 when they are 3 miles away from their destination

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

What is the square root of 3454?

Jlenok [28]

Answer: 58.7

Step-by-step explanation:

6 0

3 years ago

Three years hence a father will four times as old as his son will be. Before two years he was seven times as old as his son was.

myrzilka [38]

Answer: The father is 37 years and the son is 7 years

Step-by-step explanation:

Let x represent the present age of the father.

Let y represent the present age of the son.

Three years hence a father will four times as old as his son will be. This means that

x + 3 = 4(y + 3)

x + 3 = 4y + 12

x - 4y = 12 - 3

x - 4y = 9- - - - - - - - - - - - - - - -1

Before two years he was seven times as old as his son was. This means that

(x - 2) = 7(y - 2)

x - 2 = 7y - 14

x - 7y = - 14 + 2

x - 7y = - 12- - - - - - - - - - - - - - -2

Subtracting equation 2 from equation 1, it becomes

3y = 21

y = 21.3 = 7

Substituting y = 7 into equation 1, it becomes

x - 4 × 7 = 9

x - 28 = 9

x = 9 + 28

x = 37

7 0

3 years ago

Read 2 more answers