3 years ago

Pls help with my homework, 5,11,12

Mathematics

1 answer:

Ilya [14]3 years ago

4 0

These will be the answers

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Jerome, Kevin, and Seth shared a submarine sandwich.

Elanso [62]

Seth at 1 - 1/2 - 1/3 = 1/6 of the sandwich.

Therefore the ratio is:

1/2 : 1/3 : 1/6

Multiply everything by 6:

3: 2: 1 D

6 0

3 years ago

The average value of two positive numbers is 30% less than one of the two numbers. By which percentage is average value bigger t

Viefleur [7K]

Answer:

75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

So:

$Average = \frac{x + y}{2}$

And:

$Average = (1 - 30\%) * x$ -----30% less than x

Substitute $Average = (1 - 30\%) * x$ in $Average = \frac{x + y}{2}$

$\frac{x + y}{2} = (1 - 30\%) * x$

$\frac{x + y}{2} = (1 - 0.30) * x$

$\frac{x + y}{2} = 0.70 * x$

$\frac{x + y}{2} = 0.70x$

Cross multiply

$x + y = 0.70x * 2$

$x + y = 1.40x$

Collect like terms

$1.40x - x = y$

$0.40x = y$

Make x the subject

$x = \frac{y}{0.40}$

$x = 2.50y$

So, the average is:

$Average = (1 - 30\%) * x$

$Average = (1 - 30\%) * 2.50y$

$Average =0.70 * 2.50y$

$Average =1.75y$

Rewrite as:

$Average =(1 + 0.75)y$

Express as percentage

$Average =(1 + 75\%)y$

This means that the average is 75% bigger than the second number

6 0

3 years ago

Solve the equation <br> 13(x + 1) + 2x = 2

Goryan [66]

13x + 13 + 2x = 2
15x + 13 = 2
15x = -11

4 0

3 years ago

Read 2 more answers

Bryan, Angela, Elan, and Fiona folded some paper flowers for their school fund-raising project. Elan folded one-fifth of the pap

Tamiku [17]

Answer:

a) 88

b) 162 $

Step-by-step explanation:

Given Bryan sold 9 more flowers than Elan

1/4 x - 1/5 x = 9

x/20 = 9

x = 180

Flowers with Bryan = 45

Flowers with Elan = 36

45+36 = 81

Remaining flowers = 99

Flowers with Fiona = 8/9 * 99 = 88

7 0

3 years ago

Evaluate f(-2) = -3x² - 2x

Delvig [45]

Answer:

-2F=7x

Step-by-step explanation:

F*-2= -2F 3x*3x=9x

-2F=9x-2x

8 0

3 years ago