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bazaltina [42]
3 years ago
15

{3.1 + y=8{2x + 2y = 8​

Mathematics
1 answer:
Eva8 [605]3 years ago
3 0

(x,y)=(-0.9,4.9)

{3.1 + y=8

{2x + 2y = 8

{y=4.9

{2x + 2y = 8

2x + 2y = 8

2x + 2×4.9 = 8

x=-0.9

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I need help with this math questions can anyone help Thanks.<br> Can u help me on #1 and#2
Fynjy0 [20]
1.
yes
x is number of group acts
y is number of indivual acts


2. I would eliminate x by multiplying 2nd equation by -3 then adding

12x+6y=120
<u>-12x-3y=-90 +
</u>0x+3y=30

3y=30
divide by 3
y=10

sub
4x+y=30
4x+10=30
4x=20
divide 4
x=5

each group act takes 5 mins and each individual takes 10 minutes
<u /> 

4 0
3 years ago
Geoff and hazel bought a new car for $25,000. The car loses approximately 15% of its value each year.
igor_vitrenko [27]

Answer:

69 tht is the answer if you work it out

Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
A group of tourists spend $168 to rent snorkels and find. A total of 10 snorkels and 12 pairs of fins are rented. Renting a snor
WITCHER [35]

Answer:

Cost to a rent a snorkel=\$ 12                ,           Cost on 10 rent  snorkel =\$ 120

Step-by-step explanation:

Given,

Tourist spend on rent snorkel and fin=\$ 168

10 snorkel and 12 pairs of fin

Let the cost to  rent a snorkel be =\$x

and cost of a pair of fin is =\$y

x=3y            (given condition)

10x+12y=168

10\times 3y+12y=168

30y+12y=168

42y=168

y=168/42

y=4

Cost of a pair of fin=  y=\$ 4

x=3y

x=3\times 4

x=12

Cost of rent a snorkel=\$ 12

Total cost of a rent snorkel

=10\times 12

   =\$ 168

5 0
3 years ago
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lions [1.4K]

Answer:

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6 0
3 years ago
At what elevation does the atomosphere become too thin to breath
prohojiy [21]
At around 20'000ft. and higher.
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