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Inessa05 [86]
4 years ago
7

Enter an inequality that represents the description, and then solve.

Mathematics
1 answer:
zepelin [54]4 years ago
8 0

Answer:

7x + 9 ≥ 30

x ≥ 3

Step-by-step explanation:

7x + 9 ≥ 30

7x ≥ 21

x ≥ 3

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What is sin 45°?<br> Lol I need help
Dahasolnce [82]

Answer:

1/ √2

Step-by-step explanation:

Here, we want to get the value of sin 45

Mathematically the sine is the ratio of the opposite to the hypotenuse

The opposite here is 1 while the hypotenuse is

√2

so the value of sin 45 will be;

1/ √2

6 0
3 years ago
Graphs and equations of lines
dmitriy555 [2]

Answer:

a) y = -\frac{3}{4} x + 5

b) y = 6x-18

c) y = \frac{4}{5} x+\frac{19}{5}

Step-by-step explanation:

a) The slope / gradient is the coefficient of x, so for a) it will be y=-\frac{3}{4} x + C.

C is the y-intercept, so the full equation will be y = -\frac{3}{4} x + 5.

b) Again, since the slope is 6, we know the coefficient of x will be 6.

Now, we have a point on the line and so far, we know the equation is y=6x+c. The coordinates of the point are (2,-6). So now we substitute the y and x values into the equation in order to find C.

-6 = 6(2)+C

-6 = 12+C

C = -18

y = 6x-18

c) To find the gradient we must use the formula \frac{rise}{run}.

rise = change in y value

run = change in x value

so, the gradient = \frac{7-3}{4-(-1)} = \frac{4}{5}

Now the equation is y = \frac{4}{5} x +C

Again, to find C we substitute any of the coordinates into the equation. I will use (-1,3).

3 = \frac{4}{5} (-1) +C

3 + \frac{4}{5} =C

C =\frac{19}{5}

so c) is y = \frac{4}{5} x+\frac{19}{5}

6 0
3 years ago
What object has a definite beginning and a definite ending?
Andrew [12]
A line segment has a definite ending and beginning
8 0
4 years ago
7x - 2 = 2y 3x = 2y - 1
77julia77 [94]
<span>7x - 2 = 2y
7x = 2y + 2
so
</span>7x = 2y + 2<span>
3x = 2y - 1 
----------------subtract
4x = 3
  x = 3/4

</span>7x - 2 = 2y
7(3/4) - 2 = 2y
21/4 - 2 = 2y
21/4 - 8/4 = 2y
13/4 = 2y
so
y = 13/4 * 1/2
y = 13/8

answer
<span>(3/4, 13/8)</span>


4 0
4 years ago
HELPPPP!!!!!!!!!!!!!!!!!!!!
Elena L [17]

Answer:

= 4x - 56

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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