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Delicious77 [7]
3 years ago
12

Which equation has no solution

Mathematics
2 answers:
Lera25 [3.4K]3 years ago
6 0
7y+9=7y-6

9 is not equal to -6
Stels [109]3 years ago
6 0
7y+9=7y-6

Just try and solve them all and this one doesn't make sense
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3x - 5y = 14 and – 2x + 2y = 0
zubka84 [21]

Answer:

x=5.6

y=-5.6

Step-by-step explanation:

3x - 5y = 14 Equation 1

– 2x + 2y = 0 Equation 2

Simultaneous equation can be solved either through elimination method or substitution method. But we use elimination method for this question

Multiply equation 1 by -2 (the coefficient of x in equation 2) and multiply equation 2 with 3 (the coefficient of x in equation 1), so that x will have the same coefficient in the new equations, and easy to eliminate

-2(3x - 5y = 14)

-6x+10y=-28 Equation 3

3(– 2x + 2y = 0)

-6x+6y=0 Equation 4

Subtract equation 4 from 3 to eliminate x

-6x+10y=-28

-6x+6y=0

-6x-(-6x)=-6x+6x=0

10y-6y=5y

-28-0=-28

5y=-28

y=-28/5

y=-5.6

Substitute for y in equation 2

– 2x + 2y = 0

– 2x + 2(-5.6) = 0

-2x-11.2=0

-2x=11.2

x=-11.2/2

x=5.6

7 0
3 years ago
Oliva ties 2.5 feet of ribbon on to 1 balloon how many yards of ribbon dose olivia need for 18 balloons
Bezzdna [24]

Olivia needs 15 yards of ribbon.

2.5x18=45 feet

divide 45ft by 3 to see how many yards that would be.

45/3=15

Hope that I helped

4 0
3 years ago
Find to one decimal place, the area of:
Maru [420]

Answer:que?

Step-by-step explanation:

4 0
3 years ago
Simplify 2^-6 times 2^3
IgorC [24]

Answer:

(2^-6)*(2^3)

=2^(-6+3)

=2^-3

=1/(2^3)

=1/8

3 0
3 years ago
Read 2 more answers
marta has 7 more than half as many books as lucy. if l is the number of the books lucky has which expression could be use to fin
artcher [175]

Answer:

M= 1/2(x)+7

Step-by-step explanation:

Let M = Martha.

Let X = Number of Lucy's blocks.

Martha has half the amount as Lucy  - 1/2(x)

Then 7 more than that - 1/2 (x) + 7

3 0
2 years ago
Read 2 more answers
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