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2 years ago

Find the multiplicative inverse of 2/3 * - 5/7

Mathematics

1 answer:

boyakko [2]2 years ago

6 0

Answer:

$-\frac{21}{10}$ is the required multiplicative inverse.

Step-by-step explanation:

First of all simplify the given expression.

$\frac{2}{3}\cdot \frac{-5}{7}=-\frac{2\cdot \:5}{3\cdot \:7}=-\frac{10}{21}$

Multiplicative inverse of any number when multiplied gives 1.

The multiplicative inverse of $-\frac{10}{21}$ is $-\frac{21}{10}$ because:

$-\frac{10}{21}\times -\frac{21}{10}=1$

Best Regards!

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yawa3891 [41]

Answer:

a and d = 32

Step-by-step explanation:

since ABC and DEF are similar m<A = m<D so you have the equation

5x + 12 = 8x

subtract 8x from both sides

5x + 12 -8x = 0

subtract 12 from both sides

5x -8x = -12

combine like terms

-3x = -12

devide by -3

x = 4

plug 4 into equation

5(4) + 12 = 8*4

20 + 12 = 32

32 = 32

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2 years ago

The probability of an event - picking teams. About (a) 10 kids are randomly grouped into an A team with five kids and a B team w

LuckyWell [14K]

Answer: The required probability is $\dfrac{4}{9}$

Step-by-step explanation:

Since we have given that

Number of kids = 10

Number of kids in Team A = 5

Number of kids in Team B = 5

There are three kids in the group, Alex and his two best friends Jose and Carl.

So, number of favourable outcome is given by

$2(\dfrac{8!}{3!\times 5!})$

Total number of outcomes is given by

$\dfrac{10!}{5!\times 5!}$

So, the probability that Alex ends up on the same team with at least one of his two best friends is given by

$\dfrac{2(\dfrac{8!}{5!\times 3!)}}{\dfrac{10!}{5!\times 5!}}\\\\=2\times \dfrac{8!}{3!}\times \dfrac{5!}{10!}\\\\=\dfrac{4}{9}$

Hence, the required probability is $\dfrac{4}{9}$

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2 years ago

Allison wants to buy a game that costs $120. She has saved $30 for the game. She earns $5 per hour babysitting.

sergey [27]

Answer:

Step-by-step explanation:

Cost of game = $120

Current savings = $30

Rate for babysitting (per hour) = $5/hour

So, required equation is :-

120 = 5h + 30

5h = 90

h = 18

She must make $90 by babysitting for 18 more hours.

7 0

2 years ago

Read 2 more answers

I’ll give brainliest

diamong [38]

Answer:

A=115.6

Step-by-step explanation:

Hey There!

So the first step is to find the formula for area of a trapezoid

$A = \frac{1}{2} h(b1 +b2)$

h = height

b1 = base 1

b2 = base 2

now all we do its plug in the values

$A=\frac{1}{2} 6.8(28.3+5.7)$

$6.8x26.3=192.44\\5.7x6.8=38.76\\38.76+192.44=231.2\\\frac{231.2}{2} =115.6\\A=115.6$

Hope this helps!!

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2 years ago

What is the distance around a triangle with the sides measuring 2⅛, 3½ and 2½?

Marta_Voda [28]

So when you have data given this kind of form... you should convert to decimal first.
So that would be:
a ≈ 2.12
b = 3.5
c = 2.5
Now just place the simple perimeter formula, and sum all sides.

7 0

3 years ago

Find the multiplicative inverse of 2/3 * - 5/7​

Find the multiplicative inverse of 2/3 * - 5/7