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lana [24]
3 years ago
7

Please help me with this one

Mathematics
2 answers:
Zina [86]3 years ago
8 0

\huge\boxed{\mathfrak{Answer}}

l = 5 \: cm \\ w = 2 \: cm \\ h = 7 \: cm

The formula to find SA => 2lh + 2lw + 2hw

SA => 2lh + 2lw + 2hw \\  = 2 \times 5 \times 7 + 2 \times 5 \times 2 + 2 \times 7 \times 2 \\  = 70 + 20 + 28 \\  = 118  \: \: cm {}^{2}

=> The surface area of the rectangular prism is <u>1</u><u>1</u><u>8</u><u> </u><u>cm²</u><u>.</u>

Alex73 [517]3 years ago
3 0

Answer:

2×5×7+2×5×2+2×7×2

70+20+28

108cm^2

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Zina [86]

Answer:

29520728184915396206153835295

3 0
3 years ago
Select the assumption necessary to start an indirect proof of the statement. If 3a+7 &lt; 28, then a&lt;7.
pashok25 [27]
When applying indirect proofs, we assume the negation of the conclusion is true, and show that this assumption would lead to nonsense, or contradiction.

In our case we assume a is not smaller than 7, that is we assume a≥7.

a≥7 then, multiplying both sides by 3:
3a≥21, then, adding both sides 7:

3a+7≥28,

which is a contradiction because 3a+7 is smaller than 28.

So our assumption is wrong, which means the opposite of it is correct.


Answer: assume a≥7
7 0
3 years ago
X÷ 5+1 = 11<br> X =<br> What does X =
Serjik [45]

Answer:

x = 2

Step-by-step explanation:

x/5 + 1 = 11
    x/5 = 10
        x = 50

7 0
2 years ago
Jason solved the following equation to find the value for x.
Ainat [17]
Plug in 6.5 for x.
-8.5x-3.5x=-78
-8.5(6.5)-3.5(6.5)=-78
-55.25-22.75=-78
-78=-78
5 0
2 years ago
2 of a dozen eggs are cracked. What percent of the carton is NOT cracked using the percent proportion
levacccp [35]

If 2 of 12 eggs are cracked, then 10 are not cracked.

SO

10/12=5/6=about 0.83

0.83 of total eggs not cracked is also equivalent to 83 percent as asked in the problem :)

6 0
3 years ago
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