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Ainat [17]
3 years ago
9

How do u find original price if the sales tax is 9%

Mathematics
1 answer:
podryga [215]3 years ago
4 0
Multiply the 34.88 x .9 and the answer is the original cost (31.39)

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Please help me!!!!! Show your work 45-45-90 method <3
aivan3 [116]

Answer:

hope it helps and u understand

check the steps in picture attached

7 0
3 years ago
Read 2 more answers
At 7:00 a.m., Alicia pours a cup of tea whose temperature is 200°F. The tea starts
EastWind [94]

Answer:

Step-by-step explanation:

Here we have the temperature variation with time given in an exponential equation as follows;

Let the temperature at time x (in minutes) = y

Therefore, y = a × mˣ + b

Where:

b = Shift of the curve or the limit value of the decreasing exponential function as x → ∞

When y = 200, x = 0

Therefore. 200 = a × m⁰ + c = a + c

We note that c is the shift of the graph, the value upon which temperature increases = final temperature = 72°F

Hence a = 200 - 72 = 128°F

When y = 197, x = 2 minutes

Therefore, 197 = 128·m² + 72 =

m² = (197 - 72)/128 = 125/128

m = √(125/128) = 0.98821

Hence the exponential equation of cooling is presented in the following equation;

y = 128 × (0.98821)ˣ + 72

Therefore, y = 128(0.989)x + 72

When the temperature is 172°F we have;

170 = 128 × (0.989)ˣ + 72

∴ (0.989)ˣ = (170 - 72)/128

= 98/128

= 0.7656

log(0.989)ˣ = log(0.7656)

x·log(0.989) = log(0.7656)

x = log(0.7656)/log(0.989)

= 24.15 minutes

4 0
3 years ago
The ratio of Kyle's money to Nora's money is 4:3. If Kyle has $24, how much money does Nora have?
Alchen [17]

Answer:

If Kyle has 24, then Nora has 18

Step-by-step explanation:

24/4=6

6*3=18

3 0
3 years ago
Write an algebraic equation to match each graph. (These graphs are not drawn to scale!) please help! i will make brainliest answ
ddd [48]

Answer:

the expression of this function is:

f(x)=|x-1|-1

Step-by-step explanation:

This graph corresponds to an absolute value function, which as you can see has the minimum (vertex) at the point (1, -1) on the plane, and also that goes through the origin of coordinates (0, 0)

therefore, notice that from the point (0, 0) to (1, -1) there is a slope of "-1" which is going to characterize the steepness of the x- variable that resides inside the absolute value function. since the vertex has also moved from the characteristic (0, 0) in the function:

f(x)=|x|

then we have to include a horizontal shift to the right in one unit (by subtracting 1 units from x), and a vertical shift  downwards one unit (by subtracting 1 from the full absolute value expression) in order to shift the vertex to the position (1, -1):

f(x)=|x-1|-1

3 0
3 years ago
Given: -16 = m/5 -18; <br> Prove: m=10
spayn [35]

Answer:

I have proven m is 10. have a good day and give brainliest if possible.

3 0
3 years ago
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