All categories

2 years ago

SOMEONE ANSWER HURRY PLEASE

Mathematics

1 answer:

Aleksandr-060686 [28]2 years ago

8 0

Answer:

A, B, and C

Step-by-step explanation:

Let's simply the equation first

-2(-8 - 4y + 3/4)
16 + 8y - 1 1/2

What did Daniel do wrong?

Well, let's break down what I did and compare it to Daniel.

I multiplied -2 and -8x to get 16x. A negative number times a negative number is positive, and 2 times 8 is 16

Daniel, on the other hand, added the two terms.

The first term should be positive (A)

I multiplied -2 and -4y to get 8y. The same sign rules apply.

Daniel got a negative number, but it is supposed to be positive (B)

I multiplied -2 and 3/4 should be -6/4, which simplifies to -1 2/4 which is further reduced to -1 1/2

Daniel multiplied and simplified incorrectly (C)

-Chetan K

You might be interested in

What triangle is formed with the angles 32 126 and 32

Marina86 [1]

An obtuse triangle would be formed. If you add all the angles, you get a total of more then 180 causing it to b obtuse.

7 0

3 years ago

Bridget is making greeting cards, which she will sell by the box at an art fair. She paid $30 for a booth at the fair and the ma

LiRa [457]

Answer:

when she sold 10 cards, it will cover all her cost.

Step-by-step explanation:

Profit(without charge of booth)=5x-2x

Profit=3x-30

Calculating:

3x=30

x=10

8 0

3 years ago

Need help asapdue today at 11 am

goblinko [34]

12 × 8 = 96 3 × 3 = 9 96 - 9 = 87

(unlucky jasmine she does not have enough paint )

8 0

3 years ago

10x-2y=18 8x=y solve by substitution

lana [24]

Answer:

x = -1 and y = 18

Step-by-step explanation:

Given the system of equations

y + 8x = 10... 1

2y - 4x = 40 ... 2

From 1; y = 10-8x

Substitute into 2;

2(10-8x) - 4x = 40

20 - 16x - 4x = 40

20 - 20x = 40

-20x = 40 - 20

-20x = 20

x = -1

Recall that y = 10-8x

y = 10 - 8(-1)

y = 10 + 8

y = 18

therefore your answer is x = -1 and y = 18

4 0

2 years ago

Read 2 more answers

Ben consumes an energy drink that contains caffeine. After consuming the energy drink, the amount of caffeine in Ben's body decr

Airida [17]

Answer:

The 5-hour decay factor for the number of mg of caffeine in Ben's body is of 0.1469.

Step-by-step explanation:

After consuming the energy drink, the amount of caffeine in Ben's body decreases exponentially.

This means that the amount of caffeine after t hours is given by:

$A(t) = A(0)e^{-kt}$

In which A(0) is the initial amount and k is the decay rate, as a decimal.

The 10-hour decay factor for the number of mg of caffeine in Ben's body is 0.2722.

1 - 0.2722 = 0.7278, thus, $A(10) = 0.7278A(0)$ . We use this to find k.

$A(t) = A(0)e^{-kt}$

$0.7278A(0) = A(0)e^{-10k}$

$e^{-10k} = 0.7278$

$\ln{e^{-10k}} = \ln{0.7278}$

$-10k = \ln{0.7278}$

$k = -\frac{\ln{0.7278}}{10}$

$k = 0.03177289938
$

Then

$A(t) = A(0)e^{-0.03177289938t}$

What is the 5-hour growth/decay factor for the number of mg of caffeine in Ben's body?

We have to find find A(5), as a function of A(0). So

$A(5) = A(0)e^{-0.03177289938*5}$

$A(5) = 0.8531$

The decay factor is:

1 - 0.8531 = 0.1469

The 5-hour decay factor for the number of mg of caffeine in Ben's body is of 0.1469.

7 0

3 years ago