How many $0.45 stamps can you buy with $9.00.<br> A) 0.2<br> B)2<br> C)20<br> D)200

Pleaseee help meeeeeeee

Olegator [25]

Answer:

x = 6

∠B = 126

Step-by-step explanation:

∠A = ∠B

where

∠A = 8x + 78°

∠B = 2x + 114°

8x + 78° = 2x + 114°

8x - 2x = 114 - 78

6x = 36

x = 36/6

x = 6

plugin x into ∠B = 2x + 114°

∠B = 2x + 114°

∠B = 2(6) + 114°

∠B = 126

8 0

3 years ago

Read 2 more answers

Finding the Midpoint of the Two Coordinates<br> 6.) A(-2, 3), B(5,-1)

RoseWind [281]

Answer:

The answer is

Step-by-step explanation:

The midpoint M of two endpoints of a line segment can be found by using the formula

$M = ( \frac{x1 + x2}{2} , \: \frac{y1 + y2}{2} )\\$

From the question the points are

A(-2, 3), B(5,-1)

The midpoint is

$M = ( \frac{ - 2 + 5}{2} \: , \: \frac{3 - 1}{2} ) \\ = ( \frac{3}{2} \: , \: \frac{2}{2} )$

We have the final answer as

$( \frac{3}{2} \: , \: 1) \\$

Hope this helps you

8 0

4 years ago

Mr. Jones has part of his $5,000 savings in an account that earned 7% interest and the rest in an account that earned 9% interes

Kipish [7]

Answer:z = $2286.5

y = $2713.5

Step-by-step explanation:

Let z represent the amount of money invested at the rate of 7%.

Let y represent the amount of money invested at the rate of 9%.

Mr. Jones has part of his $5,000 savings in an account that earned 7% interest and the rest in an account that earned 9% interest.. This means that

z + y = 5000

The formula for simple interest is expressed as

I = PRT/100

Where

P represents the principal

R represents interest rate

T represents time

Considering the investment at the rate of 7%,

P = x

R = 7

T = 1

I = (z × 7 × 1)/100 = 0.07z

Considering the investment at the rate of 9%,

P = y

R = 9

T = 1

I = (y × 9 × 1)/100 = 0.09y

if his annual income from the total investment was 404.27, it means

0.07z + 0.09y = 404.27 - - - - - -1

Substituting z = 5000 - y into equation 1, it becomes

0.07(5000 - y) + 0.09y = 404.27

350 - 0.07y + 0.09y = 404.27

- 0.07y + 0.09y = 404.27 - 350

0.02y = 54.27

y = 54.27/0.02 = $2713.5

Substituting y = 2713.5 into z = 5000 - y, it becomes

z = 5000 - 2713.5 = $2286.5

4 0

4 years ago

Maria necesita un par de zapatos de tacon para un evento de gala y ya vio tres pares que le gustaron mucho cada uno cuesta $500,

Art [367]

Answer:

Mária debe trabajar mínimo 9 horas si quisiera tener la cantidad para pagar cualquiera de los pares de zapatos.

Step-by-step explanation:

Tenemos que calcular la cantidad de horas que tiene que trabajar María para alcanzar la cantidad de dinero necesaria para comprar alguno de los pares. La cantidad de dinero que Mária gana por trabajar x horas es 50.50*x. La cantidad total de dinero que tiene María está dada por 200+50.50*x (se le suma la cantidad que tiene ahorrada). Luego, basta con que esta cantidad sea mayor o igual al precio de cada par de zapatos.

Para hacerlo de manera más general, considerando unos zapatos que cuestan y, tenemos la siguiente inecuación

$200+50.5x \geq y$

Restando 200 a ambos lados y dividiendo por 50.5 obtenemos que

$x \geq \frac{y-200}{50.5}$

Basta reemplazar y por el valor de cada par de zapatos, para obtener su x correspondiente.

Si y = 500, entonces $x \geq 5.94$ . Es decir, debe trabajar mínimo 6 horas.

Si y = 580 entonces $x \geq 7.52$ . Es decir, debe trabajar mínimo 8 horas

si y = 620 entonces $x\geq 8.31$ . Es decir, debe trabajar mínimo 9 horas.

Es decir que si quisiera tener la cantidad para pagar cualquiera de los pares, debe trabajar mínimo 9 horas.

8 0

3 years ago

Do anyone know how to find a slope and graph a line of a slope

Ainat [17]

Answer:

Yes!

Step-by-step explanation:

first you need two points (x,y) (x,y). $\frac{y-y}{x-x}$ is the formula you would follow to get the slope. Say you have (2,4) (3,-7) You would plug it into the formula and get $\frac{-11}{1}$ . This example you can simplify it into -11. hope that kinda helps.

4 0

3 years ago

How many $0.45 stamps can you buy with $9.00. A) 0.2 B)2 C)20 D)200