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Serjik [45]
3 years ago
13

What is the measure of angle B

Mathematics
1 answer:
pashok25 [27]3 years ago
3 0

Answer:

31

Step-by-step explanation:

a=(180-121)=59

c=(180-90)=90

180-59-90=31

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Mario vende dos autos a 30 000 dólares cada uno. En la venta de uno ganó el 20% y en la
Mariana [72]

Answer:

Mario perdió dinero, perdió 2500 dólares

Step-by-step explanation:

En el primer caso, Mario está vendiendo su carro en 30 000 dólares. En otras palabras, el precio de venta es 30 000. Te dice que en el primer carro ganó 20%, o sea que su precio de venta es una incógnita que llamaremos x y gano 20% de x. Podemos expresarlo de esta manera

x = precio de compra carro 1

x + (20% de x) = 30 000

x = 100 % de x

(100% de x) + (20% de x) = 30 000

120% de x =30 000

120% = 1.2

1.2x = 30 000

x = 25 000

El segundo caso es bastante parecido. Te indica que el precio de venta sigue siendo el mismo, pero el precio de compra es diferente. El precio de venta sigue siendo 30 000, pero el precio de compra del segundo carro esta vez será "y". En este caso, pierde 20% del precio de compra, o osea, pierde 20% de y. Se puede expresar de la siguiente manera:

y = precio de compra carro 2

y - (20% de y) = 30 000

y = 100% de y

(100% de y) - (20% de y) = 30 000

80% de y = 30 000

80% = 0.8

0.8y = 30 000

y= 37 500

Entonces tenemos que el precio de compra del carro uno es 25 000 dólares y el precio de compra del carro dos es de 37 500. Si sumamos ambas cantidades, tenemos que ambos carros costaron 62 500 dólares. Como vendió esos dos autos a 30 000 dólares cada uno, recibió 60 000 dólares. El precio por el que vendió los autos (60 000) es menor al precio del que los compro (62 500), por lo que eso representa una perdida.

Para hallar la cantidad que ganó o perdió (en este caso perdió) debes restar el precio de venta menos el precio de compra.

60 000 - 62 500 = -2 500

Como es un número negativo, representa una perdida.

6 0
3 years ago
Please help me with this.
xenn [34]

By solving a system of equations, we will see that you must use 6.67 pounds of chocolate-covered almonds.

<h3>How to solve the system of equations?</h3>

First, we need to define the two variables:

  • x = number of pounds of the $9.99 chocolate-covered almonds used.
  • y = number of pounds of the $5.99 chocolate-covered raisins used.

If we mix that, we will get:

x*$9.99 + y*$5.99 = (x + y)*C

That equation means that the cost of the individual elements of the mixture, must be equal to the total cost of the mixture. Where C is the cost of each pound of the mixture, and we know that:

C = $8.75

y = 3

Replacing that, we get:

x*$9.99 + 3*$5.99 = (x + 3)*$8.75

Now we can solve that for x:

x*$9.99 - x*$8.75 = 3*$8.75 - 3*$5.99

x*$1.24 = $8.28

x = $8.28/$1.24 = 6.67

Then you must use 6.67 pounds of the chocolate-covered almonds.

If you want to learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

3 0
2 years ago
Y=2x/a+2b solve for a
mina [271]
Solve for a.

y=2x/a+2b

Multiply both sides by a.

ay=2ab+2x

Add -2ab to both sides.

ay+−2ab=2ab+2x+−2ab

−2ab+ay=2x

Factor out variable a.

a(−2b+y)=2x

Divide both sides by -2b+y.

a(−2b+y) / −2b+y = 2x / −2b+y

a = 2x / −2b+y

6 0
3 years ago
Rewrite the following equation into slope-intercept form (y = mx + b).<br> 3x - y = 7
Stels [109]

Answer:

y=3x-7

Step-by-step explanation

Subtracted 3x, then divided by -1, made the 7 negative and the 3x positive

3 0
3 years ago
What is the volume in cubic feet of a rectangular prism with a height of 8ft and width of 8ft and a length of 18th feet.
Hitman42 [59]

The volume of the rectangular prism is 1152 cubic feet (ft^{3}), If the rectangular prism have height of 8 feet and width of 8 feet and a length of 18th feet.

Step-by-step explanation:

              The given is,

                       Let, h - Height of the rectangular prism

                              w - Width of the rectangular prism

                                l -Length of the rectangular prism

Step:1

            From the given,

                              h = 8 feet

                              w = 8 feet

                               l = 18 feet

Step:2

          Formula for volume of Rectangular prism is,

                     V = whl

        Substitute the values of w, h and l,

                     V = ( 8 × 8 × 18 )

                        = 1152

                    V = 1152 cubic feet

Result:

           Thus the volume of the rectangular prism is 1152 cubic feet (ft^{3}), for the given rectangular prism have height of 8 feet and width of 8 feet and a length of 18th feet.

3 0
3 years ago
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