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schepotkina [342]
3 years ago
12

(7i)(7i)help! please show steps​

Mathematics
1 answer:
exis [7]3 years ago
7 0

Answer:

-49

Step-by-step explanation:

multiply 7 with 7 then i with i and lastly multiply the result numbers

7i × 7i ➡ 7 × 7 = 49

i × i = i^2

49 × i^2 = 49i^2

i^2 = -1 ➡ 49 × (-1) = -49

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Analyze the diagram below and answer the question that follows.
babunello [35]

Shaded part means the yellow part

  • The two sets are S and Y.
  • The centre intersection part is A\cap
  • All the areas occupied by both sets is AUB .

Rest part :-

\\ \sf\longmapsto E-AUB=(AUB)^c

6 0
2 years ago
Read 2 more answers
Two dressmakers, Sue and Anne, sewed costumes for a local theater production. Sue sewing alone for 10 hours sewed some of the co
crimeas [40]

Answer:

Sue would have taken 15 hours to sew all the costumes.

Step-by-step explanation:

In 10 hours, Sue sewed 5 costumes (1 every 2 hours).

Sue= 5 costumes

Sue sewed in 10 hours, twice as many costumes as Anne in 16 hours. Then 5 is twice costumes than Anne produced. Therefore, Anne sewed 2.5 costumes.  

Anne: 2.5 costumes  

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6 0
3 years ago
What would be equation would be perpendicular to p(1,3), y = 2x - 1?
Nutka1998 [239]
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7 0
3 years ago
A machine shop produces heavy duty high endurance 20-inch rods that are meant for use in a variety of military grade equipment.
QveST [7]

Answer:

The probability that a defective rod can be salvaged = 0.50

Step-by-step explanation:

Given that:

A machine shop produces heavy duty high endurance 20-inch rods

On occasion, the machine malfunctions and produces a groove or a chisel cut mark somewhere on the rod.

If such defective rods can be cut so that there is at least 15 consecutive inches without a groove.

Then; The defective rod can be salvaged if the groove lies on the rod between 0 and 5 inches i.e ( 20  - 15 )inches

Now:

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P(X ≥ 15) = \dfrac{5}{20}

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= 0.25+0.25

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∴ The probability that a defective rod can be salvaged = 0.50

4 0
2 years ago
On last week's climb, each climber carried a pack that was 28% of his or her body weight. One climber weighed 78 pounds. What wa
11Alexandr11 [23.1K]
<h3><u>Solution</u> : </h3>

weight of bag :

  • 28   \% \:  \: of \:  \:  \: climber's \:  \: weight

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  • \dfrac{2184}{100}

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8 0
2 years ago
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