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3 years ago

10

on opening day the new in and out took 38 minutes to go through the drive-thru yesterday it took 16 minutes find the percent of

decrease round the nearest percent

1 answer:

Kruka [31]3 years ago

3 0

One moment, i wills answer soon working on it

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Un padre para estimular a su hijo para estudiar matemáticas le dice: por cada ejercicio que resuelvas bien te daré 7 € y por cad

Naya [18.7K]

Answer:

8 ejercicios

Step-by-step explanation:

De acuerdo a la información dada, puedes plantear las siguientes ecuaciones:

x+y= 45 (1)

7x-1y= 19 (2)

x= ejercicios que resolvió bien

y= ejercicios que resolvió mal

Primero, puedes despejar x en (1):

x= 45-y (3)

Segundo, debes reemplazar (3) en (2):

7(45-y)-1y=19

315-7y-1y= 19

315-8y= 19

315-19= 8y

296= 8y

y= 296/8

y= 37

Tercero, debes reemplazar el valor de y en (3) para encontrar x:

x= 45-37

x= 8

De acuerdo a esto, la respuesta es que el hijo ha resuelto bien 8 ejercicios.

8 0

3 years ago

Time has a total of $28 after spending half of his weekly earnings on a video game and earning $10 additional dollars for mowing

Korolek [52]

Given:

Time has a total of $28 after spending half of his weekly earnings on a video game and earning $10 additional dollars for mowing the lawn.

To find:

Weekly earnings at his part time job.

Solution:

Let x be the weekly earning.

He spend half of his weekly earning, i.e., $\dfrac{x}{2}$

He earns $10 additional dollars for mowing the lawn.

According to the question,

$\dfrac{x}{2}+10=28$

$\dfrac{x}{2}=28-10$

$\dfrac{x}{2}=18$

Multiply both sides by 2.

$x=36$

Therefore, his weekly earnings is $36.

5 0

3 years ago

1.Suppose f(x)=6x^2+2x-7 and g(x)=4x-3.Find Each Of The Following Function.

marysya [2.9K]

(1)

(f+g)(x) = 6x^2+2x-7+4x-3=6x^2+6x-10

(f-g)(x)=6x^2+2x-7-4x+3 = 6x^2-2x-4

(2)

(f+g)(x)=2x-3x+1-2x=-3x+1

(f-g)(x)=2x-3x-1+2x=x-1

6 0

3 years ago

Simplify the ratio:<br> 18,750 : 216 =

aleksandr82 [10.1K]

The ratio to this problem is 750:216

5 0

2 years ago

Read 2 more answers

PLEASE HELPPPPP. URGEENNTT!!! I DONT KNOW HOW TO SOLVE THIS

Oksi-84 [34.3K]

Answer:

A = 58.7 degrees

B = 66.9 degrees

C = 34.1 degrees

Step-by-step explanation:

<u><em>For <A:</em></u>

Tan A = $\frac{opposite}{adjacent}$

Tan A = $\frac{23}{14}$

Tan A = 1.6

A = $Tan^{-1} 1.6$

A = 58.7 degrees

<u>For <B:</u>

Sin B = $\frac{opposite}{hypotenuse}$

Sin B = $\frac{23}{25}$

Sin B = 0.92

B = $Sin^{-1} 0.92$

B = 66.9 degrees

<em><u>For <C:</u></em>

Sin C = $\frac{opposite}{hypotenuse}$

Sin C = $\frac{14}{25}$

Sin C = 0.56

C = $Sin^{-1}0.56$

C = 34.1 degrees

6 0

3 years ago