Step by step explanation please

Mathematics

1 answer:

galina1969 [7]3 years ago

8 0

Two equal triangles

2(1/2×b×h)

=2(1/2×8×10)

$= 80 {cm}^{2}$

Three rectangles

=3(l×h)

=3(18×8)

=3(144)

$432 {cm}^{2}$

Total Surface area

$80 {cm}^{2} + 432 {cm}^{2} \\ 512 {cm}^{2}$

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3. Mr. Jones sold two pipes at $1.20 each. Based on the cost, his profit one was 20% and his loss on the other was 20%. On the s

Umnica [9.8K]

Solution:

20 % profit on $ 1.20 

= $ 20/100 × 1.20

= $ 0.20 × 1.20

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Similarly, 20 % loss on $ 1.20 

= $ 20/100 × 1.20

= $ 0.20 × 1.20

= $ 0.24

Therefore, in one pipe his profit is $ 0.24 and in the other pipe his loss is $ 0.24.

Since both profit and loss amount is same so, it’s broke even.

Answer: (a)

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3 years ago

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3 years ago

Marcie solved the following inequality and her work is shown below:. . −2(x − 5) − 12 ≤ 4 + 6(x + 3). −2x + 10 − 12 ≤ 4 + 6x + 1

BartSMP [9]

All steps that Marcie did are right, but she forgot to change sign in last step.

Consider the inequality

$-2(x - 5) -12 \le 4 + 6(x + 3).$