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belka [17]
3 years ago
12

Elimination method 10x-4y=-8 -5x+6y=10

Mathematics
1 answer:
AURORKA [14]3 years ago
4 0
Eliminate the x terms: Multiply the second equation by 2
-10x+12y=20

Add it to the first equation
10x-4y=-8
-10x+12y=20
——————-
0x+8y=12

y = 1.5

10x-4(1.5)=-8
10x = -2
x = -1/5
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How many sides does a regular polygon have if each of its interior angles is 165 degree.
hoa [83]
24
Complete step-by-step answer:
Thus, the regular polygon with interior angle each measuring 165∘ is a 24-sided polygon.
6 0
2 years ago
Evaluate the exponent expression 3x–4 ⋅ xy2 for x = –1 and y = 2.
ddd [48]

Answer:

48

Step-by-step explanation:

Given,

x = - 1

y = 2

To find : The value of 3x - 4 ⋅ xy² ?

Substitute the given values of x and y in the expression 3x - 4 ⋅ xy².

3x - 4 ⋅ xy²

= 3 ( - 1 ) - 4 ⋅ ( - 1 ) ( 2 )²

= - 3 - 4 ⋅ - 1 ( 4 )

= - 12 ⋅ - 4

= 48

Note : -

When a negative number gets multiplied with a negative, the resulted number is a positive number.

8 0
2 years ago
⋆ Help please! ⋆ This is a test! ⋆ No links! ⋆
Alina [70]

Answer:

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Step-by-step explanation:

5 0
2 years ago
It costs $3.56 to buy a pack of pencils. Which of the following equations shows the amount of money needed, x, to buy k packs of
FrozenT [24]
Well, since we know $3.65 is how much ONE PACK of pencil costs, and k represents the packs of pencils PURCHASED, and x represents the COST per pack, your answer would be A. x = 3.65k. This is because to find out the total cost (x) of k amount of packs, you would multiply the cost (3.65) times k, (known as 3.65k), which would be expressed as x = 3.65k. =)
Hope I helped! ^-^
6 0
3 years ago
Read 2 more answers
16x+4(x-5) how do I solve this.?
Nadusha1986 [10]

Answer:20x-20

16x+4(x-5)

4(x-5)=4x-20

16x+4x

20x-20

8 0
3 years ago
Read 2 more answers
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