Ayuda la tengo que entregar hoy

Would someone please be able to answer this for me?

kobusy [5.1K]

//Question number 1//

When graphing an inequality there are certain things to keep in mind that make it different from an equation of a line.

Here are some of them:

*You must look out to see whether it will be dashed or solid

*You must know which side of the graph to shade it in

*If they are not in standard form, you have to change them into standard form (THIS ONE MIGHT ACTUALLY APPLY TO A REGULAR EQUATION)

----Basically, the main difference is that in a "normal equation" you have an equal sign while in an inequality you have inequality signs (≤, ≥, <, >)----

//Question Number 2//

------ When using ≤ or ≥ (where they have half the equal sign at the bottom) the line for the inequality would be solid

------ When using < or > (where there is no equal sign- just the inequality sign) the line for the inequality would be dashed

------------------BY THE WAY, I INCLUDED AN ILLUSTRATIO OF AN INEQUALITY GRAPH TO GO ALONG WITH THE 3RD QUESTION----------------

7 0

3 years ago

110 +0.70x = 50+ 0.90x

timurjin [86]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{x = 300}}}}}$

Step-by-step explanation:

$\sf{110 + 0.70x = 50 + 0.90x}$

Move 0.90x to left hand side and change it's sign

⇒ $\sf{0.70x - 0.90x + 110 = 50}$

Move 110 to right hand side and change it's sign

⇒ $\sf{0.70x - 0.90x = 50 - 110}$

Collect like terms

⇒ $\sf{ - 0.2x = 50 - 110}$

Calculate

⇒ $\sf{ - 0.2x = - 60}$

Divide both sides of the equation by -0.2

⇒ $\sf{ \frac{ - 0.2x}{ - 0.2} = \frac{ - 60}{ - 0.2} }$

Calculate

⇒ $\sf{x = 300}$

Hope I helped!

Best regards!!

5 0

2 years ago

Solve for x. Round to the nearest hundredth.

Airida [17]

Answer: $32.98^{\circ}$

Step-by-step explanation:

Since, By the given diagram,

In quadrilateral ABCD, all angles are right angles ⇒ DC = AB = 15 cm and CB = DA

Also, In triangle DFA,

$sin 56^{\circ} = \frac{DA}{DF}$

⇒ $sin 56^{\circ} = \frac{DA}{16}$

⇒ $16\times sin 56^{\circ}=DA$

⇒ $13.2646011609\text{ cm} = DA$

Now, In triangle, DEC,

$tan x = \frac{EC}{DC}$

⇒ $tan x = \frac{EB-CB}{DC}$

⇒ $tan x = \frac{EB-DA}{DC}$

⇒ $tan x = \frac{23-13.2646011609}{15}$

⇒ $tanx = \frac{9.73539883912}{15}$

⇒ $tanx = 0.64902658927$

⇒ $x = 32.9846428556^{\circ} \approx 32.98^{\circ}$

3 0

3 years ago

40

Minchanka [31]

Answer:

A: 9 seconds

B: 144 ft.

Step-by-step explanation:

A:

Let t = no. of seconds for them to meet

When they meet the sum of their distances is 270 ft, dist = rate * time

16t + 14t = 270

30t = 270

t = 270/30

t = 9 seconds

B:

He ran 9 sec at 16 ft/sec, therefore:

9 * 16 = 144 ft

7 0

2 years ago

Read 2 more answers

Solve the system of equations by substitution 3x+y=9z

poizon [28]

Answer:

x = 1.27

y = 5.18

Step-by-step explanation:

to solve this system of equation by simultaneous equation we say that let

3x+y=9.............................. equation 1

-5x+2y=4 .......................... equation 2

from equation 1

3x+y=9.............................. equation 1

y = 9 -3x.............................. equation 3

substitute the value of y = 9 -3x into equation 2

-5x+2y=4 .......................... equation 2

-5x + 2( 9 -3x) = 4

-5x + 18 - 6x = 4

collect the like terms

18 - 4 = 6x + 5x

14 = 11x

divide both side by 11

14/11 = 11x/11

x = 14/11

x = 1.27

put the value of x = 1.27 into equation 3

y = 9 -3x.............................. equation 3

y = 9 - 3( 1.27)

y = 9 - 3.82

y = 5.18

to check if you are correct put the value of x and y into either equation 1 or equation 2.

3x+y=9.............................. equation 1

3( 1.27) + 5.18 = 9

3.81 + 5.18 = 9

9 = 9

3 0

2 years ago