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NeX [460]
3 years ago
7

3. Solve for y: X + 9y = 27

Mathematics
2 answers:
telo118 [61]3 years ago
7 0

Answer:

y=3 - x/9

Step-by-step explanation:

harina [27]3 years ago
4 0

Answer:

y= 27-x/9

Step-by-step explanation:

x + 9y = 27

9y = 27-x

9y/9 = 27- x/ 9

y = 27-x/9

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Simplify the expression below.
Mazyrski [523]

Answer:

D. x^24

Step-by-step explanation:

If it is in the parenthesis you multiply.

-2*-12= 24

Two negatives equals a positive.

7 0
3 years ago
What is the sum of the expression (8- 4 i) + (-2+7i)?
prohojiy [21]

Answer:

The sum of the expression (8 - 4i) + (-2 +7i) is (6 + 3i)

Step-by-step explanation:

In the complex numbers (a + bi) and (c + di), we can add the real parts together and the imaginary parts together, so their sum is

(a + bi) + (c + di) = (a + c) + (b + d)i

Let us use this fact to solve our question

∵ The complex numbers are (8 - 4i) and (-2 + 7i)

∴ Their sum = (8 - 4i) + (-2 + 7i)

∵ The real parts are 8 and -2

∵ 8 + -2 = 8 - 2 = 6

∴ The sum of the real parts is 6

∵ The imaginary parts are -4i and 7i

∵ -4i + 7i = 3i

∴ The sum of the the imaginary parts is 3i

∵ (8 - 4i) + (-2 + 7i) = (8 - 2) + (-4 + 7)i

∴ (8 - 4i) + (-2 + 7i) = 6 + 3i

∴ The sum of the expression (8 - 4i) + (-2 +7i) is (6 + 3i)

5 0
3 years ago
Two cars travel at the same speed to different destinations. Car A reaches its destination in 17 minutes. Car B reaches its dest
Goryan [66]

Answer:

speed of car A =Speed of car B=0.8 miles/minutes.

Step-by-step explanation:

We are given that speed of car A is equal to speed of car B.

Also let car A travels x miles.

and car B travels y miles.

Car A  reaches its destination in 17 minutes.

this means that speed of car A is given by:  \dfrac{x}{17} miles/minutes  ( since speed is defined as the ratio of distance and time).

Car B reaches its destination in 32 minutes.

This means that the speed of car B is given by: \dfrac{y}{32} miles/minutes

as speed of both cars are equal this means:

\dfrac{x}{17}=\dfrac{y}{32}------(1)

Also we are given Car B travels 12 miles farther than Car A.

this means y-x=12

y=12+x------(2)

on using equation (1) and (2) we have:

\dfrac{x}{17}=\dfrac{12+x}{32}\\  \\32x=17(12+x)\\\\32x=17\times12+17x\\\\32x-17x=17\times12\\\\15x=122\times17\\\\x=13.6

Hence the speed of car A is 0.8 miles/minutes  ( since x/17 is the speed of car A)

Speed of car B=0.8 miles/minutes.



8 0
4 years ago
Evaluate the expression
alexgriva [62]
\frac{40-4}{9+3} =  \frac{36}{12} = 3
3 0
3 years ago
Read 2 more answers
the area of a library tabletop is 27 1/8 square feet. The table is 3 1/2 feet wide. What is the length of the table ?
Artemon [7]
27⅛ ÷ 3½

in my opinion, turning it into a decimal is easier

27 ⅛ = 27.125
3 ½ = 3.5

so.....
27.125 ÷ 3.5 = 7.75 which is also 7 ¾
7 0
4 years ago
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