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koban [17]
3 years ago
15

Solve this System of equation 3c+6d=18 6c-2d=22

Mathematics
1 answer:
olga55 [171]3 years ago
7 0

Answer:

3x + 6y = 18  \:  \:  \: \\  +  \\ 3 \times (6x - 2y = 22) \:  \:  \: 18x - 6y = 66 \\  \\ 21x = 84 \\ x =  \frac{84}{21}  = 4

c=x=4

d=(18-3×4)÷6=6÷6=1=y

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Solve for x: 3x − 2 > 5x + 10. (5 points)
Galina-37 [17]

Answer:

x < -6

Step-by-step explanation:

3x - 2 > 5x + 10

first step is to isolate x

3x -2 >5x +10

3x > 5x + 10 + 2

3x -5x > 10 + 2

now that we have 3x and -5x we can combine them

-2x > 10 + 2

now add 10 +2 =12

-2x > 12 (now divide by -2)

x < -6 (when we divide we flip the inequality sign)

5 0
3 years ago
The moon is about 382,500km away from Earth. This distance actually varies by about 22,500km. What are the maximum and minimum d
KiRa [710]

Answer:

The minimum distance to the moon is of 360,000 km and the maximum distance is of 405,000 km

Step-by-step explanation:

The maximum distance is found adding the variation.

The minimum distance is found subtracting the variation.

We have that:

Distance: 382,500 km

Variation: 22,500 km

So

Maximum distance: 382500 + 22500 = 405,000 km

Minimum distance: 382500 - 22500 = 360,000 km

The minimum distance to the moon is of 360,000 km and the maximum distance is of 405,000 km

6 0
3 years ago
Write and evaluate the expression. Then, check all that apply.
dlinn [17]

Answer:

a-90

=102-90

=12

8 0
3 years ago
NEED HELL ASAP WILL GIVE BRAINLY algebra 1
Lesechka [4]

Answer:

x - 6 = 24

Step-by-step explanation:

1/3 x - 2 = 8

Multiply all the terms by 3

3*1/3x - 2*3 = 8*3

x - 6 = 24

4 0
3 years ago
Read 2 more answers
Write the quadratic function in standard form.<br><br> y=2(x - 3)² +9
xz_007 [3.2K]

Answer:

y = 2x^2 - 12x + 27

Step-by-step explanation:

<u>Step 1:  Distribute the power</u>

y = 2(x - 3)² + 9

y = 2(x^2 - 6x + 9) + 9

y = 2x^2 - 12x + 18 + 9

y = 2x^2 - 12x + 27

Answer: y = 2x^2 - 12x + 27

5 0
3 years ago
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