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3 years ago

Pleasssseeeeee hhhhheeeelllpppp

Mathematics

2 answers:

Alex777 [14]3 years ago

5 0

Answer:

what can I help you miss

Leya [2.2K]3 years ago

5 0

Answer: A' = (1, 5)

B' = (-3, 5)

C' = (-3, 2)

D' = (1, 2)

<u>Step-by-step explanation:</u>

Reflecting across the y-axis provides the opposite x-value.

Z = (x, y) --> Z' = (-x, y)

A = (-1, 5) --> A' = (1, 5)

B = (3, 5) --> B' = (-3, 5)

C = (3, 2) --> C' = (-3, 2)

D = (-1, 2) --> D' = (1, 2)

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3 years ago

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Answer:

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3 years ago

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3 years ago

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frutty [35]

Answer:

$t= \frac{125}{38} s$

Step-by-step explanation:

We are given the temperature inside the machine from startup until 10 seconds later, the formula is:

$h(t)= 42 \cdot t +1 - 4\cdot t +2 (degrees \, C)$

We want to know at what time t the temperature inside the machine will be equal to 128 °C.

So we set:

$h(t)=128$

$42\cdot t+1-4\cdot t+2=128$

Now, we rearrange the equation to keep terms with t on the left hand side and terms without t on the right hand side

$42\cdot t-4\cdot t=128-1-2$

and we simplify:

$(42-4)\cdot t= 128-2-1= 125$

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now it's easy to solve for t:

$t=\frac{125}{38}$

And thus we arrive to the solution.

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