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2 years ago

Wirk out the values of 5x-2y when x=-2 and y = -2

Mathematics

1 answer:

elena-s [515]2 years ago

3 0

Step-by-step explanation:

5x - 2y

5(-2) - 2(-2)

-10 + 4

= - 6

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What was the diameter of the tree?

Masja [62]

H) 8 feet , The diameter is the line that passes straight across the tree stump.

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2 years ago

Kim and Susan are playing a tennis match where the winner must win 2 sets in order to win the match.For each set the probability

Nikolay [14]

Answer:

a) the probability that Kim wins the match is 0.7046

b) the probability that Kim wins the match in exactly 2 sets is 0.4096

c) the probability that 3 sets are played is 0.4608

Step-by-step explanation:

a) Kim's wins:

P(Kim wins first two sets) =0.64×0.64=0.4096

P(Kim wins first set, Susan wins second set, Kim wins third set)=0.64×0.36×0.64≈0.1475

P(Susan wins first set, Kim wins second and third set)= 0.36×0.64×0.64≈0.1475

P(Kim wins)=0.4096+0.1475+0.1475=0.7046

b) Kim wins the match in exactly 2 sets

P(Kim wins first two sets) =0.64×0.64=0.4096

c) 3 sets are played

P(Kim wins first set, Susan wins second set, Kim wins third set)=0.64×0.36×0.64≈0.1475

P(Susan wins first set, Kim wins second and third set)= 0.36×0.64×0.64≈0.1475

P(Kim wins first set, Susan wins second and third set)=0.64×0.36×0.36≈0.0829

P(Susan wins first set, Kim wins second set and Susan wins third set)=0.36×0.64×0.36≈0.0829

P(3 sets are played)=0.1475+0.1475+0.0829+0.0829=0.4608

5 0

2 years ago

PLEASE HELP! Daniela has a rectangular yard with a pool in the shape of a semicircle. How many square feet of grass does Daniela

GalinKa [24]

Answer:

Part 1) Area of rectangle $3,600\ ft^{2}$

Part 2) Area of semicircle $1,413\ ft^{2}$

Par 3) Total area of grass $2,187\ ft^{2}$

Step-by-step explanation:

we know that

The total area of grass is equal to the area of rectangle minus the area of semicircle

step 1

Find the area of rectangle

The area of rectangle is equal to

$A=45*80=3,600\ ft^{2}$

step 2

Find the area of semicircle

The area of semicircle is equal to

$A=\frac{1}{2}\pi r^{2}$

we have

$r=60/2=30\ ft$ -----> the radius is half the diameter

substitute

$A=\frac{1}{2}(3.14)(30)^{2}$

$A=1,413\ ft^{2}$

step 3

Find the total area of grass

$3,600\ ft^{2}-1,413\ ft^{2}=2,187\ ft^{2}$

3 0

2 years ago

I am thinking of an a number less than 20 greater than 10. the sum of the digits in the number is 6. what is the number? It’s fo

Leno4ka [110]

Answer:

might be 12

Step-by-step explanation:

i think so its prob 12 i just have a feeling

3 0

2 years ago

A student takes English and American History this semester. The probability that a student passes English is 0.5. The probabilit

mash [69]

Answer:

50% chance of passing english

40% chance of passing American History

30% chance of passing both classes

Step-by-step explanation:

3 0

2 years ago