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3 years ago

-1.4(-5+7g) simplify the expression please!

Mathematics

2 answers:

Alja [10]3 years ago

5 0

Answer:

7-9.8g

-1.4(-5) = 7

7(-1.4g) = -9.8g

NNADVOKAT [17]3 years ago

4 0

Answer:

7-9.8g

Step-by-step explanation:

Distributive property.

1. -1.4 x -5= 7

2. -1.4 x 7g= -9.8g

3. 7-9.8g

hope this helps!

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The perimeter of the base of a square pyramid is 16 feet and it stands 20 ft tall. Calculate the volume.

Vikentia [17]

Answer: $1706.67 feet$

Step-by-step explanation:

Formula: Volume = $\frac{1}{3} \alpha^{2}h$

a is the length of the base's edge and h is the height. Since 16 is the length we would square it as it is the length, then we would multiply it by the height which is 20 ft.

Steps: Multiply

Volume = $\frac{1}{3} \alpha^{2}h$

= $\frac{1}{3} * 16^{2} * 20$

= $1706.67 feet$

~I hope I helped you :)~

6 0

3 years ago

Factor completely 9ab + 12ax − 6b − 8x.

Len [333]

Okay so you split 9ab + 12ax - 6b - 8x
 into two 2-term polynomials 
 + 12ax + 9ab and - 6b - 8x
 doesn't look that good to me so lest try other one :
 9ab + 12ax and - 6b - 8x
 looks good for now

 Pull out from each binomial separately
 9ab + 12ax = 3a • (3b + 4x)
 - 6b - 8x = - 2 • (3b + 4x)

 Add up to arrive at the desired factorization so now you have
 (3a - 2) • (3b + 4x)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hope that Helped!

5 0

3 years ago

Please help me with 4,11, and 12.

irina1246 [14]

4. C and D both are correct

12. H

11. B

7 0

3 years ago

Iodine-125 has a half-life of about 60 days.

Murljashka [212]

62.5 mg sample will remain after 240 days

Step-by-step explanation:

Given

Half-life = T = 60 days

The formula for calculating the quantity after n half lives is given by:

$N = N_0(\frac{1}{2})^n$

Here

N is the final amount

N_0 is the initial amount

n is the number of half lives passed

The number of half lives are calculated by dividing the time for which the remaining quantity has to be found by half life

The quantity has to be calculated for 240 days so,

$n = \frac{240}{60}\\n = 4$

Given

$N_0 = 1000\ mg$

Putting the values in the formula

$N = 1000 (\frac{1}{2})^4\\=1000 * \frac{1}{16}\\=\frac{1000}{16}\\=62.5\ mg$

Hence,

62.5 mg sample will remain after 240 days

Keywords: Half-life, sample

Learn more about half-life at:

#LearnwithBrainly

3 0

3 years ago

Solve mathematics question, please:) Unanswered re-asked question.

Fiesta28 [93]

Remember you can do anything to an equation as long as you do it to both sides

and when multiply by negative, flip sign

8+h>2+3h
minus h both sides
8+h-h>2+3h-h
8+0>2+2h
8>2+2h
minus 2 both sides
8-2>2-2+2h
6>0+2h
6>2h
divide by 2 both sides
6/2>2h/2
3>1h
3>h

first opotin

3 0

3 years ago

Read 2 more answers