Ask question

Ask question

All categories

3 years ago

13

3+(-7.5)+1.2 and -3+1/2

2 answers:

AveGali [126]3 years ago

4 0

3-7.5+1.2 = -3.3

-3+.5 = -2.5

frez [133]3 years ago

4 0

The answer to this question is 2.5 I hoped I helped you bye bye now

You might be interested in

Explain I don’t understand

Serggg [28]

So just divide 100 by 25 which equals 4 then divide 120 by 30 which also equals to 4 and if the rest equal 4 then its proportional (1)
And then same for 2 and 3 just divided the bottom by the top and if they all get the same answer they are proportion and if one is not the same then it’s not

For the grids if the dots are line diagonally straight and it starts at the 0 then it’s proportional if not then it’s not

Hope this helps :)

7 0

3 years ago

A closed, rectangular-faced box with a square base is to be constructed using only 36 m2 of material. What should the height h a

kkurt [141]

Answer:

$b=h=\sqrt{6}$ m

Step-by-step explanation:

Let

Bas length of box=b

Height of box=h

Material used in constructing of box=36 square m

We have to find the height h and base length b of the box to maximize the volume of box.

Surface area of box= $2b^2+4bh$

$2b^2+4bh=36$

$b^2+2bh=18$

$2bh=18-b^2$

$h=\frac{18-b^2}{2b}$

Volume of box, V= $b^2h$

Substitute the values

$V=b^2\times \frac{18-b^2}{2b}$

$V=\frac{1}{2}(18b-b^3)$

Differentiate w. r.t b

$\frac{dV}{db}=\frac{1}{2}(18-3b^2)$

$\frac{dV}{db}=0$

$\frac{1}{2}(18-3b^2)=0$

$\implies 18-3b^2=0$

$\implies 3b^2=18$

$b^2=6$

$b=\pm \sqrt{6}$

$b=\sqrt{6}$

The negative value of b is not possible because length cannot be negative.

Again differentiate w.r.t b

$\frac{d^2V}{db^2}=-3b$

At $b=\sqrt{6}$

$\frac{d^2V}{db^2}=-3\sqrt{6}$

Hence, the volume of box is maximum at $b=\sqrt{6}$ .

$h=\frac{18-(\sqrt{6})^2}{2\sqrt{6}}$

$h=\frac{18-6}{2\sqrt{6}}$

$h=\frac{12}{2\sqrt{6}}$

$h=\sqrt{6}$

$b=h=\sqrt{6}$ m

7 0

3 years ago

Write 1\3(12x-6)+6 in standard form

AlladinOne [14]

Try math way . com , its free and lets you enter all different types of problems!!

7 0

3 years ago

Read 2 more answers

2. Mikel eats 22 ounces of candy in 11 days.

Sergeu [11.5K]

Answer:

22/11=2 2x8=16

16 ounces = 1 pound

Step-by-step explanation:

a. 2 ounces per day

b. 8 days to eat 1 pound of cady

3 0

2 years ago

Groan needs to buy some pencils. Brand A has a pack of 24 pencils for 8.77 .brand B has a pack of 26 pencils for $9.84 find the

ratelena [41]

Brand A has a unit price of .37 cents
brand B has a unit price of .38 cents
so you get 2 more pencils for .1 cent each, so brand B is the better deal

3 0

3 years ago

Read 2 more answers