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3 years ago

Math. :)

Mathematics

2 answers:

vovikov84 [41]3 years ago

8 0

This is one-step equation.
$W+2.1=5.4 \\ W+2.1-2.1=5.4-2.1 \\ W=3.3 \\ CHECK- \\ 3.3+2.1=5.4$

ruslelena [56]3 years ago

3 0

$\sf~W+2.1=5.4$

Subtract 2.1 to both sides:

$\sf~W=3.3$

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A quiz consists of 10 multiple choice questions, each with five possible answers, one of which is correct. to pass the quiz a

blsea [12.9K]

The probability is 0.006, or 0.6%.

This is binomial; there are a fixed number of trials (10), the events are independent (the chances of one occurring do not affect the chances of the other occurring), and there are two outcomes (either right or wrong).

He must get 6 of the 10 questions correct, so k is 6 and n is 10. The probability of getting a question correct is 1/5=0.2; the probability of getting a question incorrect is 4/5=0.8.

$_{10}C_6\times(0.2)^6\times(1-0.2)^{10-6}
\\
\\\frac{10!}{6!4!}\times(0.2)^6\times(0.8)^4
\\
\\210(0.2)^6\times(0.8)^4=0.0055\approx0.006$

6 0

4 years ago

Match the equation to its solution. 2^2* 2^3 =2^x x = 6 x = 1 x = 5 x = 8

olga_2 [115]

Answer:

x = 5

Step-by-step explanation:

2² x 2³ = 2^x

Laws of indices states that when the base is same the powers can be added when two terms are multiplied,

2^(2+3) = 2^x

2⁵ = 2^x

x = 5

5 0

3 years ago

PLEASE HELP AND SHOW WORK I RLLY NEED TO PASS

Alex787 [66]

40×4×4=640

b=20 h=4

using formula:

1/2×base×height

1/2×20×4=40

its says scale by factor 4:

b=80 h=16

using formula:

1/2×base×height

1/2×80×16=640

answer------>>>>640cm^2

8 0

3 years ago

If a=2 and b=3 then find the value of 4a^2-4ab+b^2

liraira [26]

Answer:

Step-by-step explanation:

=> $4a^2-4ab+b^2$

Where a = 2, b = 3

=> $4(2)^2-4(2)(3)+(3)^2$

=> 4(4) - 4(6) + 9

=> 16 - 24 + 9

=> -8 + 9

=> 1

5 0

4 years ago

Read 2 more answers

Be-1 where on the boat are registration numbers placed?

Neko [114]

There is a requirement for the Coast Guard that all vessels must be registered with the state in which they'll be operated and their registration numbers must be clearly displayed on the boat.
The sequence of the numbers must be written to both sides of the vessel in a sequence such that it can be read from left to right. The mirror-reading on the vessel is not allowed.
Now the numbers must be Displayed on the front portion of the boat that is the forward half of the vessel.

6 0

3 years ago