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

Answer:

B (2,28)

Step-by-step explanation:

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

[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%

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

#SPJ1

Answer:

the answer the other dude gave is right

Step-by-step explanation:

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:

2

Step-by-step explanation:

good right solve and rate my answer

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.

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:

410.77

Step-by-step explanation:

Hope this helps

Answer:2y-2x+3

Step-by-step explanation:

Combine like terms:

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

2y-2x+3

Answer:

n = -1.75

As a fraction = -7/4

Step-by-step explanation:

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:

im sooo sorry

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.

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.

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:

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:

hi

Step-by-step explanation:

Answer:

Part a:

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

Multiplying the numerator and denominators,

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

Step-by-step explanation:

100% = 83 minutes

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

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

Answer:

1000

Step-by-step explanation:

10 = 0.1

10,000=?

cross multiply

(10,000 *1 )/10

=1000

Answer:

im pretty sure its false

Step-by-step explanation:

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.