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4 years ago

Mind my hand writing but I’m not sure what sign to put the “-“ or the “+” ?

Mathematics

2 answers:

Ierofanga [76]4 years ago

4 0

hello!

so the answer that you put there is actually wrong and i'll tell you why and how to do it

so since you are adding the two:

-8x + 9x = x (so you got this part right)

-12 + 4 = -8 (this is where you got it wrong, -12 added 4 goes up in value to -8)

so the final answer is x - 8

i hope this helped and have a nice day!

antoniya [11.8K]4 years ago

4 0

go with the bigger numbers sign

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A print shop prints 356 copies of a booklet. The booklet has 38 pages. How many pages were printed?

FrozenT [24]

Answer:

13528 pages

Step-by-step explanation:

356 x 38= 13528

4 0

3 years ago

Can someone please answer A and B please?

marta [7]

2 bags

7 apples

A) Instead of a lets say:

a = 1, 2 , 3

If a =1 then, (you already know there are 2 bags) you have 1 apple in each bag, making total of 2 apples

If a =2 then you are having 2 apples in each bag making total of 4 apples

If a =3, 3 apples in each bag, making total of 6 apples

Conclusion:

2 * 1 = 2

2 * 2 = 4

2 * 3 = 6

See the difference & pattern here

Now lets do with a

2 * a = 2a

B) If a = 6

then, 2*6 = 12

lets continue from a =3

2*4=8

2*5=10

2*6=12

See the pattern again

Tip: Drawing making problem understand better.

6 0

3 years ago

What would be 12.6 - 4.9 as an estimate?

-Dominant- [34]

I would say 8.0 Because if you do 12.6-4.9 you get 7.7 ...hope that helped

6 0

3 years ago

Read 2 more answers

Solve 6/×-3 =x/3

Eduardwww [97]

Answer:

X = -3. non-extraneous

Step-by-step explanation:

The given equation is $\frac{6}{x-3} =\frac{x}{3}$

We cross multiply to get:

$6*3=x(x-3)$

Expand and multiply.

$18=x^2-3x$

$x^2-3x-18=0$

We factor to obtain:

$(x-6)(x+3)=0$

$x=-3,x=6$

Checking for extraneous solutions

Substitute x=-3 $\frac{6}{-3-3} =\frac{-3}{3}$

$\frac{6}{-6} =\frac{-3}{3}$

$-1=-1$

$1=1$ .....Non-extraneous

Checking for x=6

$\frac{6}{6-3} =\frac{6}{3}$

$\frac{6}{3} =\frac{6}{3}$

$2=2$ ....Non-extraneous

6 0

3 years ago

Find the volume of the solid of revolution formed by rotating about the x--axis the region bounded by the given curves.

kherson [118]

Answer:

$=\frac{364\pi}{3}$ cubic units

Step-by-step explanation:

We are to find the volume of the solid of revolution formed by rotating about the x--axis the region bounded by the given curves.

f(x)=2x+1, y=0, x=0, x=4.

The picture is given as shaded region.

This is rotated about x axis

Limits for x are already given as 0 and 4

f(x) is a straight line

The solid formed would be a cone

Volume = $\pi \int\limits^a_b {(2x+1)^2} \, dx \\= \pi \int\limits^4_0 {(4x^2+4x+1)} \, dx \\=\pi [\frac{4x^3}{3} +2x^2+x]^5_0\\\\=\pi[\frac{4*4^3}{3}+2*4^2+4-0]\\=\frac{364\pi}{3}$

7 0

3 years ago