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mars1129 [50]
2 years ago
6

Assume that y varies directly as x then solve. If x = 12 when y = 15 find x when y = 21.

Mathematics
2 answers:
Viefleur [7K]2 years ago
7 0

Answer:

18

Step-by-step explanation:

12 and 15 are both dividable by 3 and 3 apart so if you subtract 21 by 3 than you get 18

SVETLANKA909090 [29]2 years ago
5 0

Answer:

18 or 16.8

Step-by-step explanation:

if x=12 and y=15, this can be written as y=x+3 or y=1.25x

so  your equation becomes x+3=21 or 1.25x=21

subtract 3 from both sides, or divide by 1.25

and you get x=18 or x=16.8

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Order these numbers from least to greatest :
lapo4ka [179]
If you would like to order the following numbers from least to greatest, you can do this using the following steps:

<span>- 40, 1250, - 6.44, 0.2
</span>- 40 < - 6.44 < 0.2 < 1250

The correct result would be <span>- 40 < - 6.44 < 0.2 < 1250.</span>
6 0
3 years ago
Read 2 more answers
Which graph shows y &lt; x² +1?<br> O<br> 4) Intro<br> •
Ket [755]

The graph at option 1 shows the given inequality y < x² + 1. The domain and range of the given inequality is {x: x ∈ (-∞, ∞)} and {y: y ∈ [1, ∞)}.

<h3>How to graph an inequality?</h3>

The steps to graph an inequality equation are:

  • Solve for the variable y in the given equation
  • Graph the boundary line for the inequality
  • Shade the region that satisfies the inequality.

<h3>Calculation:</h3>

The given inequality is y < x² + 1

Finding points to graph the boundary line by taking y = x² + 1:

When x = -2,

y = (-2)² + 1 = 4 + 1 = 5

⇒ (-2, 5)

When x = -1,

y = (-1)² + 1 = 2

⇒ (-1, 2)

When x = 0,

y = (0)² + 1 = 1

⇒ (0, 1)

When x = 1,

y = (1)² + 1 = 2

⇒ (1, 2)

When x = 2,

y = (2)² + 1 = 5

⇒ (2, 5)

Plotting these points in the graph forms an upward-facing parabola.

So, all the points above the vertex of the parabola satisfy the given inequality. Thus, that part is shaded.

From this, the graph at option 1 is the required graph for the inequality y < x² + 1. The boundary line is dashed since the inequality symbol is " < ".

Learn more about graphing inequalities here:

brainly.com/question/371134

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5 0
2 years ago
Read 2 more answers
Need help please and thank you
Georgia [21]

Answer:

y=5

x=20 degrees

K= 43 degrees

L=137 degrees

Step-by-step explanation:

aducent angles of parralologram add to 180 degrees

so (6x+17)+ (2x+3)=180

or 6x+17+2x+3=180

so 8x+20=180

and 8x=160

x=20 degrees

opposite sides of parralologram are equal so

6y-13= 32-3y

or 9y=45

and y=5

opposite angles are coonguent so

ang K= 2x+3

so K= 43 degrees

aducent angles of parralologram add to 180 degrees

so ang L+43=180

and L=137 degrees

<u>if you find my answer helpful please mark as brainliest </u>

7 0
3 years ago
According to the Fundamental Theorem of Algebra, which polynomial function has exactly 11 roots?
kondor19780726 [428]

Answer:

B f (x) = (x + 2) cubed (x squared minus 7 x + 3) Superscript 4

Step-by-step explanation:

idk i guess i got it right so there

5 0
3 years ago
Please help explain this!!
Hoochie [10]

Polynomial:

an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable or variables

-Hope this helped!!~~ <3

3 0
3 years ago
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