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4 years ago

3) What is the reciprocal of 4? (a))-4 b) 0 C 1/4 D 4

Mathematics

2 answers:

nadezda [96]4 years ago

7 0

Answer:

C) 1/4

Step-by-step explanation:

ryzh [129]4 years ago

3 0

Answer:

The reciprocal of 4 is 1/4

Step-by-step explanation:

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We need to buy 4 spirals for every student. If we have 25 students, how many spirals should we order?

ozzi

Answer:

100

Step-by-step explanation:

4 spirals for 1 student. 4 x 25 to get the total number, and that equals 100

8 0

3 years ago

The sum of the diagonals of a rhombus is 5√2.

Alex

Greetings!
Let ABCD be a rhombus
AC + BD = 5√2 cm

Area of ABCD = Ar△ABD + Ar △BCD
$= \frac{1}{2} \times BD \times AO + \frac{1}{2} \times BD \times OC$
$= \frac{1}{2} BD (AO + OC)$
$\frac{1}{2} BD \times AC$

$So, \frac{ BD \times AC}{2} = 4 \: cm {}^{2}$
$BD \times AC = 8$
$Now, AC + \: BD = 5 \sqrt{2}$

Squaring both sides, we get
$AC {}^{2} + BD {}^{2} + 2 AC.BD =50$
$AC {}^{2} + BD {}^{2} + 2 \times 8 = 50$
$AC {}^{2} + BD {}^{2} = 50 - 16$
$AC {}^{2} + BD {}^{2} = 34$

In △AOB, we have
$OA {}^{2} + OB {}^{2} =AB {}^{2}$
$( \frac{ AC }{2} ) {}^{2} + ( \frac{ BD}{2} ) {}^{2} = AB {}^{2}$
$\frac{ AC {}^{2} } {4} + \frac{ BD {}^{2} }{4} = AB {}^{2}$
$AC {}^{2} + BD {}^{2} = 4 AB {}^{2}$
$34 = 4 AB {}^{2}$

Square rooting both sides
$\sqrt{34} = 2 AB$
$Perimeter = 4 \: AB \\ = 2 \times 2 \: AB \\ = 2 \: \times \sqrt{34 } \\ = 2 \sqrt{34 \: } units$ .

Hope it helps!

7 0

3 years ago

The diagram below shows two

LiRa [457]

Answer:

4 cm

Step-by-step explanation:

$\frac{8}{ST} = \frac{4}{2} \\\\ST = 8*2 / 4\\ST = 4$

6 0

3 years ago

Given:y=3x-4 what is the x-intercept

Kryger [21]

try desmos u can type it in and it will show you but the answer is 1.333

3 0

3 years ago

Read 2 more answers

I need help with this one please

Zanzabum

Answer: Dealership 4: he would pay $40.33

Step-by-step explanation: I used a calculator, so if you have 1/3 you put 1 divided by 3 in your calculator and right that down somewhere completely

Then, you divide $121 dollars by the number you got for 1 divided by 3 and then multiply it by 121 and should get 40.3333333333 but you round to the nearest tenth so it would by 40.33

1÷3= 0.33333333333

121×0.33333333333= 40.3333333333

3 0

3 years ago