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erastova [34]
2 years ago
8

This is part 2 of my question! but the questions are marked as odds for this part, which is part 2.

Mathematics
1 answer:
Yakvenalex [24]2 years ago
5 0

19) 15 <= 9 + 3x

15) x = 23,24,25

17) x <= 115

9) Second line

11) g > 20, don't fill in dot, any number greater than 20

1) -3 + h<= 3.4

3) No, x > -2

5) x > 14, don't fill in dot, any number greater than 14

7) k<=20, fill in dot, 20 or any larger number

(took me while to type this out lol cause on mobile)

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Did I do this right????
Svetlanka [38]

Answer:

x = -7, y = -3 yup you did it right!

Step-by-step explanation:

Solve the following system:

{-2 y + x = -1 | (equation 1)

8 y - 5 x = 11 | (equation 2)

Swap equation 1 with equation 2:

{-(5 x) + 8 y = 11 | (equation 1)

x - 2 y = -1 | (equation 2)

Add 1/5 × (equation 1) to equation 2:

{-(5 x) + 8 y = 11 | (equation 1)

0 x - (2 y)/5 = 6/5 | (equation 2)

Multiply equation 2 by 5/2:

{-(5 x) + 8 y = 11 | (equation 1)

0 x - y = 3 | (equation 2)

Multiply equation 2 by -1:

{-(5 x) + 8 y = 11 | (equation 1)

0 x + y = -3 | (equation 2)

Subtract 8 × (equation 2) from equation 1:

{-(5 x) + 0 y = 35 | (equation 1)

0 x + y = -3 | (equation 2)

Divide equation 1 by -5:

{x + 0 y = -7 | (equation 1)

0 x + y = -3 | (equation 2)

Collect results:

Answer: {x = -7, y = -3

4 0
2 years ago
Choose the answer that correctly simplifies the equation: 3 x (6 x 7 – 2.5 x 4)
Andre45 [30]
<span>3 x (6 x 7 – 2.5 x 4)
=</span><span>3 x (42-10)
</span>=3 x 32
=96
answer<span> D) 96</span>
5 0
3 years ago
Read 2 more answers
I NEED THE ANSWER FOR THIS INEQUALITY ASAP 30+6r ≤ 100
mash [69]

don't mind the dirty white board lol

4 0
2 years ago
What is 30 percent of 70? show work please
mart [117]
Percent means parts out of 100
x%=x/100

'of' means multiply

30% of 70 means
30/100 times 70=
3/10 times 70=
210/10=
21

answer is 21
7 0
3 years ago
The radius r(t) of the base of a cone is increasing at a rate of 10 meters per second. The height h(t) of the cone is fixed at 6
IceJOKER [234]

Answer:

dV/dt = 40π

Step-by-step explanation:

We are told that The radius r(t) of the base of a cone is increasing at a rate of 10 meters per second. Thus;

dr/dt = 10 m

Height: h = 6 m

Volume of cone is given by the formula;

V = ⅓πr²h

dV/dr = ⅔πrh

We want to find the rate at which the volume is changing at radius of 1m.

Thus;

dV/dt = (dV/dr) × (dr/dt)

dV/dt = ⅔π(1 × 6) × (10)

dV/dt = 40π

8 0
3 years ago
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