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3 years ago

I need help with this.

Mathematics

1 answer:

bearhunter [10]3 years ago

3 0

9514 1404 393

Answer:

(x, y) ⇒ (x -5, y +3)

Step-by-step explanation:

Pick a point on the original polygon. The extreme left point (at (1, 0)) will do.

Locate the corresponding image point on ABCDE. (It is point B(-4, 3).) Using coordinates, or counting grid squares, determine what must be added to the original point to get the image point.

Here, that addition is 5 squares left and 3 squares up:

image - original = (-4, 3) -(1, 0) = (-5, 0)

So, the transformation rule adds -5 to each x-coordinate and 3 to each y-coordinate:

(x, y) ⇒ (x -5, y +3)

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Which values of m and b will create a system of equations with no solution? Select two options.

Roman55 [17]

Answer:

2nd and 5th options

Step-by-step explanation:

the solution to a system of equations is at the point of intersection of the 2 lines.

If the lines are parallel then they never intersect and will have no solution.

The slopes m of parallel lines are equal.

The options with equal slopes , both - 2 are the

2nd and 5th options

6 0

3 years ago

Increase 250ml by 86%

Alexandra [31]

250=100%
25=10%
12.5=5%
2.5=1%
25*8=200(80%)
12.5+2.5=15(6%)
200+12=215(86%)
250+200=450(186%)
so 450ml is your answer
Hope this helped :)

6 0

4 years ago

PLEASEEEE.. MY TEACHER IS ASKING FOR THE ANSWER

VARVARA [1.3K]

See attached graph: v is on the y-axis and t is on the x-axis

3 0

3 years ago

Earlier we analyzed the revenue earned by the junior class at East High School from their discount card fundraiser. They had

marin [14]

Answer: If the class sold c cards, the inequality that represents their profit goal is [20c - 0.2 > 10,000]

This year’s class sold 520 cards, so they [met] their goal because they sold more than [505] cards.

Step-by-step explanation:

4 0

3 years ago

A bone fragment has 67% of the parent Pb-210 remaining. The half-life of Pb-210 is 22 years. How old is the bone fragment?

Korolek [52]

To solve this question we will use two important formulas.

The first formula involves the calculation of the decay constant, $k$ which is to be found as:

$k=\frac{0.6931}{T_{\frac{1}{2}}}$

where $T_{\frac{1}{2}}$ is the half life of Pb-210 which is given to be 22 years in the question.

Thus, $k=\frac{0.6931}{22}\approx0.0315$

Now, we will use the second formula which is called the function of decay formula and is given as:

$N = N_{0} e^{-kt}$

where $N$ percentage of Pb-210 remaining in the bone at present, which in our case is 67% or 0.67

$N_{0}$ percentage of Pb-210 to start with, which is always 100% or 1.

Plugging in all these values in the decay formula we are supposed to find the time, $t$ .

$0.67=1\times e^{-0.0315t}$

Taking natural log on both sides we get:

$ln(0.67)=-0.0315t$

$\approx-0.4005=-0.0315t$

$\therefore t=\frac{0.4005}{0.0315}$

$t\approx12.71$ years

Therefore the bone fragment is about 12.71 years old.

7 0

4 years ago