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marshall27 [118]

3 years ago

11

during the summer holidays your brother and extra money mowing lawns he mows six lines an hour and has 21 lawns to mow how long

will it take him

2 answers:

kiruha [24]3 years ago

7 0

It will take him 3 hours and 30 mins

8_murik_8 [283]3 years ago

4 0

3 1/2 hours because he has 3 6 lawns then 3 lawns left over

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Bezzdna [24]

Answer:

Step-by-step explanation:

اتتاغتينينيننينينيزنب

3 0

2 years ago

What is the solution to the systen of equations y=1/2x+2 and y=-2x-3

Naya [18.7K]

For this case we must solve a system of two equations with two unknowns, given by "x" and "y".

We have:

$y = \frac {1} {2} x + 2 (1)\\y = -2x-3 (2)$

We multiply (2) by -1:

$-y = 2x + 3 (3)$

We add (1) and (3):

$y-y = \frac {1} {2} x + 2x + 2 + 3\\0 = \frac {5} {2} x + 5\\-5 = \frac {5} {2} x$

Clearing x:

$-10 = 5x\\x = \frac {-10} {5}\\x = -2$

We substitute $x = -2$ in (2)

$y = -2 (-2) -3\\y = 4-3\\y = 1$

Thus, the solution of the system is $(x, y) = (- 2,1)$

Answer:

the solution of the system is $(x, y) = (- 2,1)$

5 0

3 years ago

Big Nicks moving company unloaded 72 % of the 300 boxes they delivered in 30 minutes. How many boxes did they unload each minute

jeka57 [31]

72 % of 300 is 216

Divide 216 ( # of boxes unloaded ) by 30 (minutes they were unloading)
216 / 30 = 7.2

They unloaded 7.2 boxes each minute.

**DOUBLE CHECK:
Multiply 7.2 by 30
7.2*30 = 216

Answer : 7.2 boxes/minute

4 0

2 years ago

Help please i do not get this

lara [203]

Answer:

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

I need help SHOW YOUR WORK

earnstyle [38]

Answer:

$F)\displaystyle \: 100\pi{ x}^{8} {y}^{2} {z}^{ 6}$

Step-by-step explanation:

we are given r and the formula

we want to find the surface area of the shpare with the given r

to do so

we need our algebra skills

substitute the value of r:

$\displaystyle \: S = 4\pi( {5x}^{4} y {z}^{ 3} {)}^{2}$

recall law of exponent

$\displaystyle \: ({x}^{m} {)}^{n} \iff \: {x}^{mn}$

to simplify:

$\displaystyle \: S = 4\pi({ {5}^{2} x}^{4 \times 2} {y}^{1 \times 2} {z}^{ 3 \times 2} )$

simplify multiplication:

$\displaystyle \: S = 4\pi({ 25x}^{8} {y}^{2} {z}^{ 6} )$

distribute:

$\displaystyle \: S = 100\pi{ x}^{8} {y}^{2} {z}^{ 6}$

hence our answer is F

5 0

2 years ago