Evaluate each expression for 8a-(4+b)

Mathematics

1 answer:

nordsb [41]4 years ago

4 0

Hey there!

First we have to distribute the negative terms

Like:

$8a + (-1) (4 + a)\\ \\ = 8a+ (-1) *4(-1a) \\ \\ = 8a + (-4) + (-a)$

Combine like terms

Like:

$8a, -a\\ \\ -4 \\ \\ 8a + (-4) + (-a)\\ \\ = 8a + (-a) + (-4) \\ \\ = 7a + (-4)$

$Answer: 7a - 4$

Good luck on your assignment and enjoy your day!

~ $LoveYourselfFirst:)$

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32x+5 = 3x - 3<br> Solving exponential equations

Likurg_2 [28]

Answer:

x = -8/29 = -0.276

Step-by-step explanation:

Step 1 :

Solving a Single Variable Equation :

1.1 Solve : 29x+8 = 0

Subtract 8 from both sides of the equation :

29x = -8

Divide both sides of the equation by 29:

x = -8/29 = -0.276

One solution was found :

x = -8/29 = -0.276

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5 0

3 years ago

Read 2 more answers

Ray industries bought a touchscreen monitor for $1200 it is expected to depreciate at a rate of 25% per year what was the value

max2010maxim [7]

So for this problem, we will be using the exponential equation format, which is y = ab^x. The a variable is the initial value, and the b variable is the growth/decay.

Since our touchscreen starts off at a value of 1200, that will be our a variable.

Since the touchscreen is decaying in value by 25%, subtract 0.25 (25% in decimal form) from 1 to get 0.75. 0.75 is going to be your b variable.

In this case, time is our independent variable. Since we want to know the value 3 years from now, 3 is the x variable.

Using our info above, we can solve for y, which is the cost after x years.

$y=1200*0.75^3\\y=506$

In context, after 3 years the touchscreen will only be worth $506.

7 0

4 years ago

There was 2/3 of pan of lasagna in the refrigerator. Bill and his friends ate half of what was left. Write a number sentence and

Veseljchak [2.6K]

Half of 2/3 is:

$\frac { 1 }{ 2 } \times \frac { 2 }{ 3 } =\frac { 1 }{ 3 }$

This means that 1/3 was left. This also means that they ate 1/3 of the lasagne.

Model diagram can be seen in attachment.