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3 years ago

Can someone help me with this question?

Mathematics

1 answer:

sesenic [268]3 years ago

3 0

Answer:

One of the angles in the triangle might be 50.

AND

The length of the third side must be 11cm or smaller.

Step-by-step explanation:

-The triangle might be an equilateral triangle (having all the same sides and angles). False, since the triangle sum theorem states that all angles inside of a triangle must add up to 180, so an equilateral triangle would need to have all three angles at 60 degrees.

-One of the angles in the triangle must be 120 (false; it can be anything above 90, which is not only 120)

-The length of the third side must be 11cm or smaller. (True, Triangle Inequality Theorem)

-One of the angles in the triangle might be 50 (possibly, so very much true)

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Given that y=18 + 3x² (i) find the value of y when x= -2

8_murik_8 [283]

Answer:

y=30

Step-by-step explanation:

f(-2)=18+3(-2)^2

f(-2)=18+3*4

f(-2)=18+12

f(-2)=30

4 0

3 years ago

Read 2 more answers

Un camarero tiene que repartir 2 botellas de 3/4litros entre 3.¿Que fraccion de litro le tocará a cada uno

vekshin1

Respuesta:

1/2 litros

Explicación paso a paso:

Dos botellas de 3/4 litros:

Litros totales = 2 * 3/4 = 6/4 litros

Número de personas entre las que se dividirá = 3

Fracción que cada uno obtendrá:

Litros totales / número de personas

= (6/4) ÷ (3)

= 6/4 * 1/3

= 6/12

= 1/2 litros

6 0

3 years ago

How can i solve this? I've looked at countless videos and nothing helps.

Andrej [43]

Let $x$ be the number of lower-level tickets sold, and $y$ the number of upper-level tickets sold.

Now, if the theater sells 350 tickets total, that means the number of lower-level and upper-level tickets that got sold should add up to 350, so one equation in the system is

$x+y=350$

You also know that the theater earns $10250 in sales, so if each lower-level ticket costs $35, and each upper-level ticket costs $25[/tex], this means $35x$ represents the amount of money made from selling lower-level ticekts, and $25y$ represents the amount of money made from selling upper-level tickets. You get the second equation in the system,

$35x+25y=10250$

So the system is

$\begin{cases}x+y=350\\35x+25y=10250\end{cases}$

Any one of the methods listed in the second part works in solving this system (though I'm not sure what "variable" refers to), but I think substituting involves the least work.

Solve the first equation for either variable; I'll choose $x$ .

$x+y=350\implies x=350-y$

Now substitute this into the second equation for $x$ , then solve for $y$ .

$35(350-y)+25y=10250\implies 10y=2000\implies y=200$

So 200 upper-level seats were sold. Meanwhile, since $x+y=350$ , this means

$x+200=350\implies x=150$

so that 150 lower-level tickets were sold.

6 0

3 years ago

Literally 50 points for whoever can answer this

Liula [17]

Answer:

92°

Step-by-step explanation:

Sum of internal angles of a regular polygon is:

S = 180(n - 2)

We have here 5-sided polygon:

S = 180*(5 - 2) = 180°*3 = 540°

Now sum the given angles measures and solve for x:

3x + 1 + 2x + 15 + 3x - 10 + 3x - 8 + 5x - 2 = 540
16x - 4 = 540
16x = 544
x = 544/16
x = 34°

Find the measure of angle R:

m∠R = 3x - 10 = 3*34 - 10 = 102 - 10 = 92
m∠R = 92°

6 0

3 years ago

Solve -3x2 + 30x - 90 = 0.

FrozenT [24]

$-3x^{2}+30x-90=0 \\ \\ x^{2}-10x+30=0 \\ \\ \Delta=(-10)^{2}-4*1*30=100-20=-20 \\ \\ \sqrt{\Delta}= \sqrt{-20}=i \sqrt{20} =2i \sqrt{5} \\ \\ x_{1}= \frac{10-2i \sqrt{5} }{2} = 5-i \sqrt{5} \\ \\ x_{2}= \frac{10+2i \sqrt{5} }{2} = 5+i \sqrt{5}$

6 0

4 years ago