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Nina [5.8K]
3 years ago
5

Solve for x.-3x-8+6=7А. x= -7/5B.x= -1/3C. x=5D. x=45​

Mathematics
1 answer:
tino4ka555 [31]3 years ago
6 0

Answer:

x=-3

Step-by-step explanation:

-3x-8+6=7

-3x-2=7

-3x-2+2=7+2

-3x=9

$\frac{-3x}{3} =\frac{9}{3} $

-x=3

x=-3

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What is the simplified form of this expression? (8x − 7) + (-2x − 9) − (4x − 3)
Murljashka [212]

Answer:

The answer to your question is:         2x -13

Step-by-step explanation:

         Simplified                             (8x − 7) + (-2x − 9) − (4x − 3)

                                                       8x - 7 - 2x - 9 - 4x + 3

         Simplified like terms            8x - 2x - 4x - 7 - 9 + 3

                                                       2x -13                                                        

4 0
3 years ago
Read 2 more answers
5c+3-2c-4<br> Simply the expression
dybincka [34]

5c+3-2c-4

+2c +2c

---------------

7c+3-4

----------------

7c-1

6 0
3 years ago
I need help with all three letters. thank u
creativ13 [48]

Answer:

Step-by-step explanation:

A to C

y = b + mx

b = y-intercept

m = slope of line

Looking at the line, the line crosses the y-axis at the coordinates (0,0). This means that the y-intercept is 0.

The slope formula is m=(y2-y1)/(x2-x1). Using the points on the line (-1, -3) and (1,3) we find that the slope is, 3.

Looking back we can see that our variables now have value so we can plug them into our formula.

y = b + mx

b = 0

m = 3

Substitute

y = 0 + 3x

4 0
3 years ago
Find the lateral area of the prism.<br> 4cm<br> 3cm <br> 6cm<br> 5cm<br> Lateral Area = [?]cm2
kolbaska11 [484]

Answer:

The lateral surface area of a prism is the sum of the surface areas of the sides of the prism.

Since the bases of the prism are triangles, there are three sides. The area of each lateral is the product of a side of the triangle times the height of the prism.

We can express this as Lateral Surface Area LSA = (s1xh) + (s2xh) + (s3+h), where "s1, s2, s3" are the lengths of the sides of the triangle and "h" is the height of the prism.

We can factor out "h" to get LSA = hx(s1+s2+s3) where the factor "s1+s2+s3" is the perimeter of the triangle.

Solving for "h", we get h = LSA / (s1+s2+s3)

For your specific problem, h = 300 / (4 + 5 + 6) = 300 / 15 = 20

4 0
3 years ago
I need the function for the volume of the box for number 1
rjkz [21]

Answer:

Step-by-step explanation:

The volume of a rectanguiar shape like this one is V = L * W * H, where the letters represent Length, Width and Height.  Here L is the longest dimension and is 28 - 2x; W is the width and is 22-2x; and finally, x is the height.  Thus, the volume of this box must be

V(x) = (28 - 2x)*(22 - 2x)*x

and we want to maximize V(x).  

One way of doing that is to graph V(x) and look for any local maximum of the graph.  We'd want to determine the value of x for which V(x) is a maximum.

Another way, for those who know some calculus, is to use the first and second derivatives to identify the value of  x at which V is at a maximum.

I have provided the function that you requested.  If you'd like for us to go all the way to a solution, please repost your question.

3 0
2 years ago
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