Solve the systems of equations by the elimination method:
-2x + 2y = 2
-4y - 2x = -22

Answer:

[tex] \fbox{A triangle can have 2 acute angles.}[/tex]

Step-by-step explanation:

Acute angle : The angle whose measure is less than 90° is called actute angle.

Obtuse angle : The angle whose measure is more than 90° is called obtuse angle.

Right angle : The angle whose measure is exact 90° is called right angle.

Property of triangle: The measure of all three angles of a triangle is 180°.

let's solve the actual question now,

Option A - let a triangle have two acute angle x and y respectively and z third angle of the respective triangle,

x + y + z = 180°

(<90°) + (<90°) + z = 180°

z = 180 - (<180)

z <180

the measure of 3rd angle z will be less than 180,

hence a triangle can have 2 acute angles.

Option B - let a right angle triangle have two right angles x and y respectively and z third angle of the respective triangle,

x+y+z = 180

90+90+z = 180

z = 180-180 = 0°

which means the third angle z does not exist and it is not a triangle. Hence a right angle triangle can only have one right angle.

Option C - let a triangle have two obtuse angle x and y respectively and z third angle of the respective triangle,

x + y + z = 180°

(>90°) + (>90°) + z = 180°

z = 180 - (>180)

when one number is subtracted from another number which is greater than that then the result obtain is negative. So the value of third angle z will be negative which is a flaw. Hence third option is also incorrect.

Option D - let a triangle have one right angle and one obtuse angle x and y respectively and z third angle of the respective triangle,

x + y + z = 180°

(90°) + (>90°) + z = 180°

z = 180 - (>180)

Same as option C, the third angle is negative which is a flaw and this option is incorrect too.

Conclusion- A triangle can have 2 acute angles and one right angle. So option A is the correct match.

[tex]\sf \small \pink{Thanks }\: \green{for} \: \blue{joining} \: \orange{brainly } \: \red{community}![/tex]

Answer:2y-2x+3

Step-by-step explanation:

Combine like terms:

3y-y+5x+3-7x

2y-2x+3

Graph of linear equation will be always straight line.

Number of ice cream cones sold be  76.

The relationship between the temperature (°F) and the number of ice cream cones sold is given by model,

                   [tex]y=1.8x-76.9[/tex]

Where x represent temperature and y represent number of ice cream cone sold.

 When temperature is  85°F  , it means that ,  x =  85°F

   So,    [tex]y=1.8*85-76.9\\\\y= 76.1[/tex]

Thus, number of ice cream cone sold is to be 76.

Learn more:

https://brainly.com/question/11733569

Answer:

x = 0

Step-by-step explanation:

6 ( x + 1 ) - 5x = 8 + 2 ( x - 1 )

6x + 6 - 5x = 8 + 2x - 2

-x = 0

x = 0

Answer:

I believe it is x= 0 but correct me if I am wrong

Answer:

Part a:

p(z=1.43) find 1.43 in z table that'll be the answer for part a

Answer:

1000

Step-by-step explanation:

10 = 0.1

10,000=?

cross multiply

(10,000 *1 )/10

=1000

Answer:

2

Step-by-step explanation:

good right solve and rate my answer

Answer:

im pretty sure its false

Step-by-step explanation:

Multiplying the numerator and denominators,

[tex]\frac{abcd}{bcde}=\boxed{a/e}[/tex]

Answer:

The value of [tex]f = x_{1}+10\cdot y_{1}+x_{2}+10\cdot y_{2}[/tex] is 317.

Step-by-step explanation:

Let the system of nonlinear equations be:

[tex]x\cdot (y-1) = 180[/tex] (1)

[tex]y\cdot (1+x) = 208[/tex] (2)

From (1), we clear [tex]x[/tex]:

[tex]x = \frac{180}{y-1}[/tex]

Let apply this resulting expression in (2):

[tex]y\cdot \left(1+\frac{180}{y-1} \right)= 208[/tex]

[tex]y\cdot \left(\frac{y-1+180}{y-1} \right) = 208[/tex]

[tex]y\cdot \left(\frac{y+179}{y-1} \right)=208[/tex]  

[tex]y\cdot (y+179) = 208\cdot (y-1)[/tex]

[tex]y^{2}+179\cdot y = 208\cdot y-208[/tex]

[tex]y^{2}-29\cdot y+208 = 0[/tex]

By the Quadratic Formula we obtain the solution of the second order polynomial:

[tex]y_{1} = 16[/tex] and [tex]y_{2} = 13[/tex]

And the respective values of [tex]x[/tex] are, respectively:

[tex]y_{1} = 16[/tex]

[tex]x_{1} = \frac{180}{y_{1}-1}[/tex]

[tex]x_{1} = \frac{180}{15}[/tex]

[tex]x_{1} = 12[/tex]

[tex]y_{2} = 13[/tex]

[tex]x_{2} = \frac{180}{y_{2}-1}[/tex]

[tex]x_{2} = \frac{180}{12}[/tex]

[tex]x_{2} = 15[/tex]

If we know that [tex]x_{1} = 12[/tex], [tex]y_{1} = 16[/tex], [tex]x_{2} = 15[/tex] and [tex]y_{2} = 13[/tex], then the value of [tex]f = x_{1}+10\cdot y_{1}+x_{2}+10\cdot y_{2}[/tex] is:

[tex]f = 12+10\cdot (16)+15+10\cdot (13)[/tex]

[tex]f = 317[/tex]

The value of [tex]f = x_{1}+10\cdot y_{1}+x_{2}+10\cdot y_{2}[/tex] is 317.

Answer:

23.7

Step-by-step explanation:

B(x) = 25.50 - 0.06x

B(30) = 25.50 - 0.06(30)

B(30) = 25.50 - 1.8

B(30)= 23.7

Hope this help I suck at explaining

Answer:

C

Step-by-step explanation:

Lorraine is typing at 8 words per minute, while Bea is doing 9 per minute

Answer: B :  Lorraine’s unit rate is 1 more word per minute than Bea’s unit rate.

Step-by-step explanation:

I took the test, B) it said It was correct

Answer:

B (2,28)

Step-by-step explanation:

Answer:

x = -5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Geometry

Step-by-step explanation:

Step 1: Set Up Equation

69° + 62° + (x + 54)° = 180°

Step 2: Solve for x

Answer:

Step-by-step explanation:

x + 54 + 69 + 62 = 180         Every triangle has 180 degrees

x + 185 = 180                        Subtract 185 from both sides

x = - 5

The word actually is Brainly, although sometimes I think I am a bit brainless.

Step-by-step explanation:

100% = 83 minutes

1% = 100%/100 = 83/100 = 0.83 minutes

74% = 1%×74 = 0.83 × 74 = 61.42 minutes

[tex] {\bf \red {\huge{answer : }}}[/tex]

The dogs weight increased from 64 pounds to 80 pounds.

80 - 64 = 16

so , the dog's weight increased more 16 pounds.

[tex] \pink {\sf{hence , \frac{16}{80} \times 100 }}[/tex]

[tex] \red{= \frac{16}{8 \cancel{0}} \times 10 \cancel{0 } }[/tex]

[tex]\purple{= \frac{ \cancel{16}}{ \cancel{8 }} \times 10 }[/tex]

[tex]\blue{= \frac{ 2}{ 1} \times 10 }[/tex]

[tex] \green{2 \times 10 = 20\%}[/tex]

Therefore , the dog's weight increased by 20%

Answer:

n = -1.75

As a fraction = -7/4

Step-by-step explanation:

Answer:

Figure B

Step-by-step explanation:

Figure B has three triangles, and 2 triangles make 1 square. So there are 1 1/2 squares :)

Sorry if I am incorrect.

The total amount of money is 65x + 10 cents.

Given the following coins value

x dimes, (x+2) nickels, and 2x quarters

If value of a dime is 10 cents, nickel is 5 cents, and a quarter is 25 cent, the the total coin is cent is expressed as 10x + 5(x + 2) + 25(2x)

Total in cents. = 10x + 5(x + 2) + 25(2x)

Total in cents = 10x + 5x + 10 + 50x

Simplify

Total in cents = 65x + 10

Hence the total amount of money is 65x + 10 cents.

Learn more on cents to dimes here: https://brainly.com/question/6810598

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Answer:

y-(-8)=4(x-2)

Step-by-step explanation:

This is point-slope form. Point-slope form is y-y₁=m(x-x₁), this is y minus the change in y equals slope (slope is m) times x minus the change in x. An ordered pair is (x, y). You just plug in the missing values. This will get you y-(-8)=4(x-2). I hope this helps! Also, make sure not to put the parenthesis around -8 in the actual box! They are just there to make for less confusion.

Answer:

im sooo sorry

Step-by-step explanation:

Answer:

the answer the other dude gave is right

Step-by-step explanation:

Answer:

hi

Step-by-step explanation:

Answer:

The quadratic formula allows us to solve any quadratic equation that's in the form ax^2 + bx + c = 0.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

410.77

Step-by-step explanation:

Hope this helps