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sergey [27]
2 years ago
12

54=6a+18b 3a-9b=-27 please add the steps

Mathematics
1 answer:
Otrada [13]2 years ago
5 0

Answer:

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Please I need a lot can someone help
Elodia [21]

Use the substitution method

V= s^3

2*2*2= 8 cm^ 3

Answer : 8 cm^ 3 - A

4 0
3 years ago
PLease help me on this one? <3
MariettaO [177]

Answer:

A. (1, 0)


Reason:

When the first equation is graphed: y <u><</u> x + 1, the left side of the line is shaded and when the second equation is graphed: y <u><</u> x^2 -3x, the bottom is shaded.

The green section does not contain solutions. So D is automatically out.

The red section does not contain solutions as well. So C is automatically out.

For choice B, the point goes out of the shaded blue section, so that's out also.

As for choice A its in the blue shaded section, which makes that answer correct.

(when the two equations are within each other and combine a color, then whatever points is within the shaded part is the right answer)


6 0
3 years ago
Information on a packet of seeds claims that 93% of them will germinate. Of the 200 seeds that I planted, only 175 germinated. (
Anvisha [2.4K]

Answer:

We reject H₀

we accept Hₐ seeds in the packet would germinate smaller than 93%

Step-by-step explanation:

Test of proportions

One tail-test  (left side)

93 %   =  0.93

p₀  =  0,93

1.- Hypothesis

<h3>H₀            ⇒ null  hypothesis                p₀ = 0.93</h3><h3>Hₐ            ⇒ Alternative hypothesis     p  = 0.875</h3><h3>2.-Confidence interval   95 %</h3><h3>α = 0,05  </h3><h3>and </h3><h3>z(c)  =  -  1.64</h3><h3>3.- Compute z(s)</h3><h3>z(s) = (p  -  p₀)/√(p₀*q₀)/n    z(s) = (0.875-0.93)/√0.93*0.07)200</h3><h3>z(s) =  -  0,055/ √0.0003255</h3><h3>z(s) =  - 0.055/ 0.018</h3><h3>z(s) =  - 3,06</h3><h3>4.-Compere z(c)   and  z(s)</h3><h3>z(s)  <  z(c)          -3.06  <  -1.64</h3><h3>z(s)  is in rejection region, we reject H₀</h3>
5 0
3 years ago
John can fly his airplane 2,800 miles with a wind speed of 50 mph. In the same time he can travel 2,400 miles against the wind.
andreev551 [17]

Answer:

650 mph

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
????????????????????
Effectus [21]
For a line to be parallel to another line, the slope must be the same.
The line given is y = 3x - 5 , so the other line's slope has to be 3.

so your answer would be A. y = 3x + 5.
5 0
3 years ago
Read 2 more answers
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