All categories

3 years ago

Evaluate the expression. -7- (-6) + 4 a. 5 b. 3 c. -17 d. -9

Mathematics

1 answer:

Westkost [7]3 years ago

4 0

4(5) + 5(6) - (-4/-2)

just to help keep the signs straight, but there is nothing wrong with the way you did it.

Now you can just start simplifying ... term by term. Multiply the 4 times the 5 and you get:

20 + 5(6) - (-4/-2)

Then multiply the 5 times the 6:

20 + 30 - (-4/-2)

Next divide the terms in the parentheses. -4 divided by -2 is +2 and you have:

20 + 30 - (+2)

When you remove parentheses preceded by a minus sign, you change the signs of the terms

inside the parentheses. So - (+2) becomes -2 when the parentheses are taken out and the

expression becomes:

20 + 30 - 2

Now add the three terms and the result is +48

Hope this clarifies the problem for you. Good job ...

You might be interested in

Two trains leave stations 374 miles apart at the same time and travel toward each other. One train travels at 95 miles per hour

sveta [45]

2 hrs and 12 min or 2.2 hrs

5 0

2 years ago

Write an equation in point-slope form of the line that passes through (-4,1) and (4,3).

Step2247 [10]

Answer:

An equation in point-slope form of the line that passes through (-4,1) and (4,3) will be:

$y-1=\frac{1}{4}\left(x+4\right)$

Step-by-step explanation:

Given the points

(-4,1)

(4,3)

Finding the slope between the points (-4,1) and (4,3)

$\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}$

$\left(x_1,\:y_1\right)=\left(-4,\:1\right),\:\left(x_2,\:y_2\right)=\left(4,\:3\right)$

$m=\frac{3-1}{4-\left(-4\right)}$

Refine

$m=\frac{1}{4}$

Point slope form:

$y-y_1=m\left(x-x_1\right)$

where

m is the slope of the line

(x₁, y₁) is the point

in our case,

m = 1/4

(x₁, y₁) = (-4,1)

substituting the values m = 1/4 and the point (-4,1) in the point slope form of line equation.

$y-y_1=m\left(x-x_1\right)$

$y-1=\frac{1}{4}\left(x-\left(-4\right)\right)$

$y-1=\frac{1}{4}\left(x+4\right)$

Thus, an equation in point-slope form of the line that passes through (-4,1) and (4,3) will be:

$y-1=\frac{1}{4}\left(x+4\right)$

5 0

2 years ago

Gaveing out points for helpers!!

Alekssandra [29.7K]

Because the two angles add up to equal 90, you would make an equation set to equal 90. On the other end you add the measures of your angles together because they are adding up to equal 90. This would look like 2x+5+35=90 and you solve from here. Add like terms making it 2x+40=90 then you subtract 40 from both sides making it 2x=50 and then divide by 2 on both sides which leaves you with x=25.

3 0

2 years ago

What's the answer to this problem

Vadim26 [7]

12 inches is the answer im sure

7 0

2 years ago

The length of the box is 2x - 2 and the width is x - 5. Find the perimeter. (HINT: p= 2L + 2W) Choose one.

trasher [3.6K]

Answer:

Option D: 6x-14 is the correct answer.

Step-by-step explanation:

Given that:

Length of the box = L = 2x-2

Width of the box = W = x-5

Perimeter is defined by the sum of length of all sides of the box.

Perimeter of the box = P = 2L + 2W

Perimeter of box = 2(2x-2) + 2(x-5)

Perimeter = 4x-4+2x-10

Perimeter = 6x-14

The perimeter of the box is 6x-14.

Hence,

Option D: 6x-14 is the correct answer.

6 0

3 years ago