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3 years ago

Help, please 20 points

Mathematics

2 answers:

lina2011 [118]3 years ago

8 0

Answer:

0.13

Step-by-step explanation:

The probability that the pupil has calculator is 0.87.

The number 1 represents the whole.

1 - 0.87 = 0.13

The probability that the pupil doesn’t have a calculator is 0.13.

mihalych1998 [28]3 years ago

5 0

Answer:

0.13

Step-by-step explanation:

1 represents the whole class

1-0.87=0.13

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3 years ago

The UAE Hope Probe is between 22,000 Km and 44,000 KM away from mars. This means its between _____________m and ______________m.

Marina86 [1]

Answer:

This means it is between 22000000 m and 44000000 m.

Step-by-step explanation:

From the question, the UAE Hope Pobe is between 22 000 km and 44 000 km away from Mars.

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3 years ago

In a pen of goats and chickens there are 25 heads and 90 feet. How many goats and chickens are in the pen.

Anna [14]

Answer:

5 chickens, 20 goats

Step-by-step explanation:

We can set up two equations and use substitution

There are 25 total goats and chickens, so

$G + C = 25$

Goats have 4 feet and chickens have two, so

$4G + 2C = 90\\$

By solving for G in the first equation,

$G = 25 - C\\$

We can now use substitution,

$G = 25 - C\\4G + 2C = 90\\4(25 - C) + 2C = 90\\100 - 4C + 2C = 90\\-2C = -10\\C = 5\\$

We have 5 chickens, so we have 20 goats.

Let's double check:

$5(2) + 20(4) = 90\\10 + 80 = 90\\90 = 90\\$

It checks out!

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4 years ago

Need help with my IXL

Maru [420]

Answer:

TU= 4 mm

Step-by-step explanation:

a^2+b^2=c^2

3^2+b^2=5^2

9+b^2=25

b^2=16

b=4

3 0

3 years ago