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4 years ago

Can someone do this for me ?plz :(

Mathematics

2 answers:

Over [174]4 years ago

6 0

You shouldn’t ask people to do it for you, but you should ask for someone to explain it to you. Good luck!

SSSSS [86.1K]4 years ago

4 0

Just solve for x if a triangle equals 180

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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

Simplify the expression.<br><br> 8k - 2(4 - 3k)

DIA [1.3K]

Answer:

14k-8

Step-by-step explanation:

8k - 2(4-3k)

distributive property

8k - 8 + 6k

add like terms

8k + 6k -8

14k - 8

If anyone will look for the value of k, k is 4/7 btw but the answer to simplify the expression would be 14k-8.

6 0

3 years ago

Read 2 more answers

On three examinations, you have grades of 85, 78, and 84. There is still a final examination, which counts as one grade In order

kirill [66]

Answer:

The average of the provided grades are 86.75

Step-by-step explanation:

Consider the provided information.

On three examinations, you have grades of 85, 78, and 84. In order to get an A your average must be at least 90.

In the last exam you get 100 marks now calculate the average by using the formula:

$\frac{\text{Sum of observations}}{\text{Number of observations}}$

$\frac{85+78+84+100}{5}$

$\frac{347}{5}$

$86.75$

86.75 is less than 90 so you will not get A.

The average of the provided grades are 86.75

6 0

4 years ago

An isosceles triangle has an angle of 70°. what are the possible values of the other two angles?

IRINA_888 [86]

Answer:

55 and 55 or 70 and 40

Step-by-step explanation:

A triangle has 180o and an isosceles triangle has two angles that are the same. As 70 is less than half, we have a couple of possible solutions to this. So one possible solution is 70-55-55. So the other possible solution is 70-70-40.

3 0

3 years ago

nhà bác hà được 240kg gạo nếp và gạo tẻ. biết số gạo nếp nhiều hoen số gạo tẻ là 20kg. hỏi nhà bác Hà thu được bao nhiêu kí gạo

Gnesinka [82]

Answer:

ani pong kaseng tanong to ang gulo hindi ko po maintindihan

4 0

3 years ago