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kirza4 [7]
3 years ago
15

Solve the systems of equations using substitution -3x+2y=12 x=2y-8

Mathematics
2 answers:
morpeh [17]3 years ago
7 0

Answer:

y=3   x=-2

Step-by-step explanation:

-3(2y-8)+2y=12

-6y+24+2y=12

-4y+24=12

-4y=-12

y=3

x=2(3)-8

6-8

x=-2

Artemon [7]3 years ago
4 0
-3x + 2y = 12
-3 (2y - 8) + 2y = 12
-6y + 24 + 2y = 12
-4y + 24 = 12
-4y = -12
y = 3

x = 2y - 8
x = 2(3) -8
x = 6-8
x = -2

Therefore, the coordinates are (-2, 3).
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-x^2 + 7x - 5

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7 0
3 years ago
Write an expression to describe a rule for a sequence. Then find the 100th term in the sequence
rjkz [21]
Its adding 8 each time

100th term is 805
8 0
3 years ago
a tree 7 ft. tall grows an average of 6in. each year. Which equation models the tree's height h after x years?
vazorg [7]
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6 0
3 years ago
Plz help me I have trouble with math gloves cost $48 and bats cost $35
34kurt
1 glove costs $48
5 gloves cost $240 (since 5*48 = 240)

1 bat costs $35
b bats cost 35*b dollars, where b is some positive whole number

The total cost of the bats and gloves is 35*b + 240. We simply add the subtotals (240 from the gloves and 35*b from the bats)

Plug in b = 3 and use PEMDAS to evaluate
35*b + 240
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105 + 240
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---------------------------------------------------

To summarize:
The cost expression is 35*b + 240 (the cost is in dollars)
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7 0
4 years ago
Select all that are undefined. sec (45°) csc (0°) sec (90°)
Murrr4er [49]

Answer:

csc (0°) and sec (90°) are not defined.

Step-by-step explanation:

Given the options wehave to select the option which is undefinesd

First option: sec 45°

sec45^{\circ}=\frac{1}{cos(45^{\circ})}=\frac{1}{\frac{1}{\sqrt2}}=\sqrt2

which is defined

Second option: csc(0°)

csc(0^{\circ})=\frac{1}{sin0}=\frac{1}{0}=\infty

which is not defined

Third option: sec(90°)

sec(90^{\circ})=\frac{1}{cos(90)}=\frac{1}{0}=\infty

which is not defined.

Hence, option 2 and 3 are not defined.

3 0
3 years ago
Read 2 more answers
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