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3 years ago

Solve all problems please for Brainly

Mathematics

1 answer:

Veseljchak [2.6K]3 years ago

4 0

Answer:

Step-by-step explanation:

Distributive property:

a(b-c) = a*b + a*-c = ab-ac

13.- 11(s+9) = 11*s + 11+9 = 11s+99

14.- -21(x-7) = -21*x -21*-7 = -21x + 147

15.- 13(20-a) = 13*20 + 13*-a = -13a + 260

16.- -8(17+b) = -8*17 -8*b = -8b - 136

17.- (r+1.68)(-0.1) = -0.1(r+1.68) = -0.1*r - 0.1*1.68 = -0.1r - 0.168

18.- 3.25(5.02-t) = 3.25*5.02 + 3.25*-t = -3.25t + 16.315

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Jay owns some DVDs. Lamar lives next to Jay and three houses from Freda. Lamar has 2 fewer DVDs than Jay. Davina lives on the ot

podryga [215]

Answer:

Step-by-step explanation:

Freda lives in house 6. Lamar lives 3 houses from Freda, so lives in house 3. Jay lives next to Lamar, but not in house 2, which is Bart's. So, Jay lives in house 4 and Davina lives in house 5, on the other side of Jay from Lamar.

Davina lives in house 5, so has the most DVDs.

Since Freda gave p DVDs to Jay, she has 17-p. Lamar has p-2, Bart has p+4, Tara has 4p-13, and Davina has the most at 3(p-2).

We want Davina to have the most DVDs, so there are some inequalities that must be true:

3(p-2) > 4p-13 ⇒ p < 7

3(p-2) > p +4 ⇒ p > 5

The only value of p satisfying both of these requirements is p = 6.

_____

Tara lives in house 1 and has 11 DVDs.

Bart lives in house 2 and has 10 DVDs.

Lamar lives in house 3 and has 4 DVDs.

Jay lives in house 4 and has 6 DVDs.

Davina lives in house 5 and has 12 DVDs. (the most)

Freda lives in house 6 and has 11 DVDs.

5 0

3 years ago

19240 rounded to nearest ten thousand

iris [78.8K]

Answer:

19,240 rounded to the nearest ten thousand is 20,000.

Step-by-step explanation:

6 0

4 years ago

Albert lives in the southern US. At noon on a summer day, the angle of elevation of the sun is 83.5 degrees. The window in Alber

bekas [8.4K]

Calculate the volume, that is easy:

4 x 5 x 2.5 = 50m3 

now, as you did not provided if you use nitrogen in 

ntp (normal temperature and pressure - 20c, 1atm) weight is 1.165kg/m3 

or: 

stp (standard temperature and pressure - 0c, 1atm) weight is 1.2506 

these are in case of pure nitrogen, as in presented case nitrogen is only 79% we need to change weights to represent that: 

ntp - 1.165kg/m3 / 100% x 79% = 0.92035kg/m3 

stp - 1.2506kg/m3 / 100% x 79% = 0.987974kg/m3 

therefore in case of: 

ntp, total weight of n2 will be 50m3 x 0.92035kg/m3 = 46.0175kg 

stp, total weight of n2 will be 50m3 x 0.987974kg/m3 = 49.3987kg

3 0

3 years ago

Read 2 more answers

The winning baseball team scores 4 times as many runs as its opponent. The winning team scores 8 runs. Write an equation with an

Veronika [31]

Answer:

4x+8=x

Step-by-step explanation:

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3 years ago

A laptop is bought for $1380 VAT inclusive. If VAT was charged at 15%, what

miskamm [114]

Answer:

vat=15%

selling price with vat=$1380

selling price with out vat=?

we have

selling price with vat=$1380

selling price with out vat+vat%of selling price with out vat =$1380

selling price with out vat(1+15/100)=$1380

selling price with out vat=$1380/1.15=$1200

4 0

3 years ago