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Ksenya-84 [330]
4 years ago
10

Please help, I am bad with fractions.

Mathematics
1 answer:
denis23 [38]4 years ago
5 0
7/4 = -5x + 6

4(7/4) = 4(-5x) + 4(6)

7 = -20x + 24

-17 = -20x

x = 17/20

Hope this helps!! :)
You might be interested in
Help me please and thanks​
vazorg [7]

Answer:

414\pi

Step-by-step explanation:

The formula for the surface area of a cylinder is 2\pi r h + 2\pi r^2 =2\cdot \pi \cdot 9 \cdot 14 + 2\cdot \pi \cdot 9^2=252\pi + 162\pi=414\pi square inches. Hope this helps!

8 0
4 years ago
Adventure play sells an mp3 for 18.00 and charges $3.25 per song. King music sell a player for $23.00 and charges $2.00. For how
Sveta_85 [38]

Answer:

4 songs

Step-by-step explanation:

Given data,

Adventure play sells mp3 = $18

Charges per song = $3.25

King music sell Mp3 = $23

Charges per song = $2

Let number of songs be Y, then we can calculate by using following method,

Adventure play MP3 cost + charges per song = Kings Music MP3 cost + charges per song

By putting the value, we get

$18 + $3.25 Y = $23 + $2 Y

By solving the equation,

$3.25 Y - $2Y = $23 - $18

$1.25 Y = $5

Y = $5 ÷ $1.25

Y = 4 songs

Hence, for 4 songs the cost be same.

4 0
3 years ago
Simplify the expression. Write your answer as a power.
Gnesinka [82]

Answer:

(3/7)^7

Step-by-step explanation:

When multiplying exponents we can use the formula: a^m x a^n = a^m+n.

In this case, we can plug in 3/7 for a, and their respective exponents as m and n.

(3/7)^3 x (3/7)^4= (3/7)^3+4= (3/7)^7

Hope this helps!

:)

8 0
3 years ago
Read 2 more answers
Solve the simultaneous equation y-2x+1=0 and 4x^2+3y^2-2xy=7
Lapatulllka [165]

The first equation is y-2x+1=0

y=2x-1 (Equation 1)

The second equation is 4x^{2}+3y^{2}-2xy=7 (Equation 2)

Putting the value of x from equation 1 in equation 2.

we get,

4x^{2}+3(2x-1)^{2}-2x(2x-1)=7

4x^{2}+3(4x^{2}+1-4x)-4x^{2}+2x=7

by simplifying the given equation,

12x^{2}-10x-4=0

6x^{2}-5x-2=0

Using discriminant formula,

D=b^{2}-4ac

D=25-4 \times 6 \times -2 = 73

Now the formula for solution 'x' of quadratic equation is given by:

x=\frac{-b+\sqrt{D}}{2a}  and  x=\frac{-b-\sqrt{D}}{2a}

x=\frac{5+\sqrt{73}}{12}  and x=\frac{5-\sqrt{73}}{12}

Hence, these are the required solutions.

8 0
3 years ago
Which of the following describes the correct process for solving the equation 3x + 6 = 21 and arrives at the correct solution?
kozerog [31]
I think the answer is D.
6 0
3 years ago
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