All categories

4 years ago

Pls help with these two math questions

Mathematics

2 answers:

densk [106]4 years ago

7 0

I see it’s math but 1-1= 0

-BARSIC- [3]4 years ago

4 0

Number 18 is D) (3+8m)-7

Number 19 is:

1) z>1

2) z>-1

3) z<1

4) z<-1

You might be interested in

Can 6,12, and 18 make a triangle?

OverLord2011 [107]

By definition, 3 side lengths are a triangle if any 2 side lengths add up to be greater than the third.

We can already see that the side lengths 6 and 12 will add up to a value of 18, which is equal to the last side length, meaning that the three values are not a triangle.

$a=6$

$b=12$

$c=18$

$a+b>c$

$b+c>a$

$c+a>b$

$6+12>18$ (Since this is not true, this is not a triangle)

Hope this helps.

頑張って!

3 0

3 years ago

What is the greatest number of cubes with a side of 1.5cm that can fit in the box with dimensions 16cm ×5cm ×12cm? Please help m

Vitek1552 [10]

Answer: 284 cubes.

Step-by-step explanation:

By definition, the volume of a rectangular prism can be calculated by multiplying its dimensions.

Knowing that the dimensions of this box are $16cm*5cm*12cm$ , we get that the volume of the box is:

$V_{box}=16cm *5cm *12cm=960cm^3$

The formula for calculate the volume of a cube is:

$V=s^3$

Where "s" is the lenght of a side.

Kwnowing that the a cube has a side of 1.5 cm, we get that the volume of one cube is:

$V_{cube}=(0.5cm)^3=3.375cm^3$

Dividing $V_{box}$ by $V_{cube}$ we get the greatest number of cubes that can fit in the box:

$number\ of\ cubes=\frac{960cm^3}{3.375cm^3}=284$

6 0

3 years ago

The Andersons traveled 90 miles in 75 minutes.

Gnoma [55]

Find how many miles they traveled per minute.

90/75 = 1.2 miles per minute

If two hours = 120 minutes, calculate how many miles they will travel

120 x 1.2 = 144 miles. The answer is A.

5 0

4 years ago

1. Write the following value in scientific notation: 23,000,000

Bas_tet [7]

Answer:

2.3 by 10^7

Step-by-step explanation:

We want this rewritten in the form 2.3*10^n.

To get the decimal point in 23,000,000 between the 2 and 3, we must move it 7 places to the left, and then compensate for this by multiplying 2.3 by 10^7.

6 0

4 years ago

Find the total area of 2cm 8cm 9cm 1cm 7cm 7cm

Yuki888 [10]

The total area would be 7056 i believe

6 0

3 years ago