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3 years ago

8

imagine that the number 2 button on your calculator is damaged and cannot be used.use a flow chart to show 3 different ways in w

hich you can calculate 24x12

1 answer:

jeka943 years ago

8 0

(6x4)(4x3)
Hope this helps you. I accidentally wrote my answer in the comment box.

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What is the solution to X and Y in these equations 3x + 9y=60 and -3x + y=30

Roman55 [17]

Answer:

x= -7 y=9

Step-by-step explanation:

3x +9y= 60 [1]

-3x +y=30 [2] rewrite this as the following: y=30+3x

With equation [2] you substitute it into equation [1]

so it will now be: 3x+ 9(30 +3x) =60

3x+270 +27x=60

Group the like terms

3x+27x=60-270

30x=-210

x=-7

Use this answer into the same equation

So: 3(-7)+9y=60

-21 +9y=60

9y=60+21

9y=81

y=9

8 0

3 years ago

The figure the Floor Plan of a balcony ,it consists of △ABC and semi-circle ,

ivanzaharov [21]

Step-by-step explanation:

(a) In right triangle ABC,

$AC^2 =AB^2 +BC^2 \\ = {12}^{2} + {5}^{2} \\ = 144 + 25 \\ = 169 \\ AC = \sqrt{169} \\ \therefore \: AC = 13\: m \\ \\ AC \: is \: the \: diameter \: of \: semicircle \\ \therefore \: r = \frac{1}{2} \times AC = \frac{1}{2} \times 13 = 6.5 \: m \\ Circumference \:of \:semi-circle \\ C = \pi \: r = 3.14 \times 6.5 = 20.41 \:m\:$

Perimeter of Balcony = 12 + 5 + 20.41 = 37.41 m

(b) Area of balcony

$=\frac{1}{2}\times 12\times 5+\frac{1}{2} \pi r^2 \\\\=\times 6\times 5+\frac{1}{2} \times 3.14\times (6.5)^2 \\\\=30+\frac{1}{2} \times 3.14\times42.25\\\\= 30+\frac{1}{2} \times 132.665\\\\= 30 + 66.3325\\\\= 96.3325 \:m^2 \\\\\approx 96. 33\:m^2$

8 0

4 years ago

5.<br> y = -x - 1<br> 3x + y = 5<br> Substitute

Nana76 [90]

Answer:

(3,-4)

Step-by-step explanation:

3x+(first equation)=5

3x+(-x-1)=5

2x-1=5

x=3, solve for y;

y=-3-1, y=-4

4 0

3 years ago

Read 2 more answers

Saras savings account balanced changers by $34 one week and by- $67 the next week.wich amount represents the greatest change?

Eduardwww [97]

The greatest change is
$ 34

4 0

4 years ago

Set of all numbers greater or equal to -8 but less than 9

Sedaia [141]

Answer:

Could you give more detail?

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3 years ago