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Svetach [21]
3 years ago
7

Giving 35 points.

Mathematics
2 answers:
tino4ka555 [31]3 years ago
7 0

Answer:

A translation 2 units downward and reflection about the y-axis.

Step-by-step explanation:

The sequence of transformations that is applied to the quadrilateral ABCD to map onto the quadrilateral A"BC"D" is:

A translation 2 units downwards and then a reflection of the quadrilateral about y-axis.

( Since on translating two units downward all the coordinates of the vertex of the quadrilateral will be shifted two units down i.e. there will be a change in y-values and no change in x-values of the coordinates; and hence on reflecting about the y-axis, the image A"B"C"D" will be obtained )

Makovka662 [10]3 years ago
4 0
Reflection over the y axis. Followed by a translation of 2 units down.
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The useful life of an electrical component is exponentially distributed with a mean of 1000 hours a. What is the probability the
julia-pushkina [17]

Answer:

0.865

Step-by-step explanation:

To solve for the probability we would be using the formula:

F(x) = 1 - e^−λx

Therefore, P(x > 2000) = F(x) = 1 - e^−λx

Mean = 1000 hours

λ = 1/mean = 1/1000 hours

x= 2000 hours

F(x) = 1 - e^−(1/1000)2000

F(x) = 1 - e^−2

= 0.8646647168

Therefore, the probability the the circuit will last at least 2000 hours = 0.865

3 0
3 years ago
Seven times the sum of 4 and some number is 42
Naddik [55]

Answer:

x=2

Step-by-step explanation:

7\times{(4+x)}=42

Divide both sides by 7:

4+x=42\div{7}\\4+x=6

Subtract 4 from both sides:

x=6-4\\x=2

7 0
3 years ago
What 2 numbers should be used to find 231 - 198 using the 10 method for subtracting quickly in your head?
Airida [17]

Answer: "Count 2 and then count 31 more."

Step-by-step explanation:

We have the equation:

231 - 198

Now, the negative number is kinda ugly, so i will write it as:

200 - 2 = 198

Is a lot easier work with 200 and 2, than with 198.

Then the equation is now:

231 - (200 - 2)

And the left number we also have a "200", so it can be written as:

200 + 31 = 231

As this is a sum, we can ignore the parentheses.

200 + 31 - 200 + 2

31 + 2

Then the correct option is:

"Count 2 and then count 31 more."

4 0
3 years ago
Answer as soon as possible
alexandr1967 [171]

Answer:

C −2a^3+9a^2+45a+6ab^2+18b^2

Step-by-step explanation:

(a+3) ( −2a^2+15a+6b^2)

Distribute the a to the large term in parentheses and the 3 to the large term in parentheses

a ( −2a^2+15a+6b^2)+3  ( −2a^2+15a+6b^2)

−2a^3+15a^2+6ab^2 −6a^2+45a+18b^2

Combine like terms

−2a^3+15a^2−6a^2+6ab^2 +45a+18b^2

-2 a^3 + 9 a^2 + 6 a b^2 + 45 a + 18 b^2

3 0
2 years ago
Read 2 more answers
Noah says to find 20% of a number he divides the number by 5. Is this true explain your answer
Nutka1998 [239]

Answer:

yes

Step-by-step explanation:

note that 20% = \frac{20}{100} = \frac{1}{5}

Hence to find 20% of a number, dividing the number by 5 is correct

20% of £30 = \frac{30}{5} = £6


5 0
3 years ago
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