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Inessa05 [86]
3 years ago
6

HELP PLEASE for brainliest!!

Mathematics
2 answers:
marta [7]3 years ago
3 0
-3 • (5x + 2y = 7)
-15x - 6y = -21
-2x + 6y = 9
__________
-17x = -12
x = 12/17
5(12/17) + 2y = 7
2y = 7 - 60/17
2y = 3.47
y = 1.735
pashok25 [27]3 years ago
3 0
One way you could solve the system of equations of y is using the process of elimination.

-2(5x+2y=7)
-5(-2x+6y=9)

-10x-4y=-14
10x-30y=-45
-------------------
-34y=-59
------ -----
-34 -34
y=1.735

When rounded is y=1.7

The solution for y is 1.7

Have a blessed day! ;)

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viva [34]
Zoe will need to buy 48 beads. 
3 + 1 + 2 = 6.
6 x 8 = 48.
Hope this helps!!!:)
3 0
3 years ago
The value of f(2) ?
prohojiy [21]

Answer:

f(2) =1

Step-by-step explanation:

f(2) is the y value of the graph when x =2

When x=2, y=1

so f(2) =1

4 0
4 years ago
Solve for x.3-sqrt(x)=0 What is the root? If there is none, choose none. x = 3 x = 9 none
Kryger [21]

Answer:

9

Step-by-step explanation:

3-sqrt(x)=0 should be rewritten as 3 = sqrt(x) or sqrt(x) = 3.

To obtain the value of x that satisfies this equation, square both sides:

x = 3^2, or x = 9.

4 0
4 years ago
Th term of a seq uence is n(n-4) /n+3 Work out the sum of the 1st and 6th terms.
AlekseyPX

Answer:

7/12

Step-by-step explanation:

The nth term Tₙ = n(n-4) /n+3.

The 1st term T₁ = 1(1 - 4)/(1 + 3) = -3/4

The 6th term T₆ = 6(6 - 4)/(6 + 3) = 6(2)/9 = 2(2)/3 = 4/3

So,  the sum of the 1st and 6th terms is T₁ + T₆ = -3/4 + 4/3

= (-9 + 16)/12

= 7/12

5 0
3 years ago
Wes can paint a certain room in 8 hours. Sally can paint the same room in 5 hours. How long will it take them working together t
lubasha [3.4K]

The time it takes them working together to paint the room is 3.08 hours

<h3>Rational expression</h3>

Rational expression are equation written as a ratio of two expressions or equations.

If Wes can paint a certain room in 8 hours, she can paint 1/8 of the room in 1 hr

Similarly, if Sally can paint the same room in 5 hours, , she can paint 1/5 of the room in 1 hr

Determine the time it takes them to paint the room altogether.

Time together = x

Using the expression below to determine the value of x

1/x = 1/8 + 1/5

1/x = 5+8/40

1/x = 13/40
x = 40/13

x = 3.08

Hence the time it takes them working together to paint the room is 3.08 hours

Learn more on rational expression here; brainly.com/question/2264785

#SPJ1

6 0
2 years ago
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