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3 years ago

Help me please do this

Mathematics

2 answers:

jarptica [38.1K]3 years ago

5 0

I don’t see anything to help you with . It’s blank

HACTEHA [7]3 years ago

3 0

Answer:

Do what

There is nothing here????

Step-by-step explanation:

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7-x/3=-1-x/8 I'm in 8th grade and I can't figure this out

antiseptic1488 [7]

Answer: x = 38.4

Step-by-step explanation:

7-x/3 = -1-x/8

1. Add 1 to both sides

8-x/3 = -x/8

2. Add x/3 to both sides

8 = x/3 - x/8

3. Multiply x/3 by 8/8 and x/8 by 3/3 to get the same number under the quotient

8 = 8x/24 - 3x/24

4. calculate the difference between 8x/24 - 3x/24

8 = 5x/24

5. Multiply both sides by 24/5, and there is the answer

38.4 = x

7 0

3 years ago

The equation for a parabola has the form y=????x2+????x+cy=ax2+bx+c, where ????a, ????b, and cc are constants and ????≠0a≠0. Fin

d1i1m1o1n [39]

The equation for this parabola satisfies

$\begin{cases}a-b+c=9\\9a+3b+c=-19\\16a-4b+c=-12\end{cases}$

(in other words, plug in each given point's coordinates $(x,y)$ into the equation $y=ax^2+bx+c$ )

Now,

$(a-b+c)-(9a+3b+c)=9-(-19)\implies-8a-4b=28\implies2a+b=-7$

$(a-b+c)-(16a-4b+c)=9-(-12)\implies-15a+3b=21\implies5a-b=-7$

and

$(2a+b)+(5a-b)=(-7)+(-7)\implies7a=-14\imples a=-2$

$2(-2)+b=-7\implies b=-3$

$(-2)-(-3)+c=9\implies c=8$

So the equation of the parabola is

$y=-2x^2-3x+8$

4 0

3 years ago

A postal service requires that any box sent by priority mail have length plus girth (distance around) totaling no more than 104

Vaselesa [24]

Answer:

The length is no more than 56 inches.

The volume of the box is 8064 cubic inches.

Step-by-step explanation:

Given : A postal service requires that any box sent by priority mail have length plus girth (distance around) totaling no more than 104 in. One volume that meets this condition is contained by a box with a square end 12 in. on each side.

To find : What is the length of the box? What is the volume?

Solution :

A square end 12 inch on each side.

Then the girth of the box is given by,

$P=4\times s$

$P=4\times 12$

$P=48$

The girth of the box is 48 inches.

A postal service requires that any box sent by priority mail have length plus girth (distance around) totaling no more than 104 in.

So, $L+48\leq 104$

$L\leq 56$

The length is no more than 56 inches.

The maximum volume of such a box would be,

$V=L\times B$

B = area of the base (or end) of the box,

So, $B=12^2=144$

The volume is

$V=56\times 144$

$V=8064\ in^3$

Therefore, The volume of the box is 8064 cubic inches.

4 0

4 years ago

What are the coordinates of point A?

mixer [17]

I think u forgot to put the picture

8 0

3 years ago

Read 2 more answers

Tính : 2020^3-1/2020+2021

pochemuha

Answer:

2020³-1/4041

Step-by-step explanation:

6 0

3 years ago