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Romashka-Z-Leto [24]
3 years ago
11

Can someone tell me if this is correct pleaseeee ?

Mathematics
1 answer:
Daniel [21]3 years ago
3 0

Answer:

6 units left

8 units up

X - 6

Y + 8

Step-by-step explanation:

A' is the ending position.

A is the starting position.

Brainliest?

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If 800g of a radioactive substance are present initially and 8 years later only 450g remain, how much of the substance will be p
artcher [175]

A=Pe^(rt)

P = 800g

t = 8 years

A = 450g

r = This is what we will try and find to start with

450=800e^(r*8)

After running the math through a calculator, we end with r = -0.07192

Now we just re-input this information into our equation: A=800e^(-0.07192*16)

A=800e^(1.15072)

Now we will re-write the equation using the negative exponent rule:

A = 800 1/e^1.15072

Combine right side:

A = 800/e^1.15072

Then do the math:

A = 253.12709836......

That will give us A = 253 (rounded to the whole number)

I hope this helps! :)

5 0
3 years ago
Evaluate the expression if a= -5 and b=-2.<br> a + 3b<br> A:4<br> B:1<br> C:11<br> D: -11
yuradex [85]

Answer:

D.-11

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
5 friend's are having a tennis tournament.Each friend will play the other 4 friend once. How many matches will be played
Paraphin [41]
The handshake problem!
Each of the five will play against 4 others, but since A vs B can be considered the same game as B vs A, so there are 5*4/2=10 matches.

3 0
3 years ago
If f(x) = (x + 7)2 and g(x) = x2 +9,
Talja [164]

ANSWER : D

EXPLANATION : 81 > 13 is true

3 0
3 years ago
The regression equation below relates the scores students in an advanced statistics course received for homework completed and f
serg [7]

Answer: d.) None of the answer choices is correct

Step-by-step explanation:

The homework score is an independent variable (known) and on the x-axis, while the midterm exam is the dependent variable, so it's on the y-axis

y = 0.91x - 94.4; and x=420

Substitute x as 420 into the equation.

y = 382.2 - 94.4 = 287.8, or approximately 288.

And this value isn't in the options above.

7 0
3 years ago
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