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3 years ago

Brainly if it is correct

Mathematics

2 answers:

Musya8 [376]3 years ago

8 0

Answer:

The third one

Step-by-step explanation:

Marina CMI [18]3 years ago

3 0

Answer:

If I'm correct it's the third option.

Step-by-step explanation:

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Martizas car has 16 gallons of gas in the tank. She use 3/4 of the gas. How many gallons of gas are left?

andrezito [222]

Answer:

4 gallons

Step-by-step explanation:

as martizas used up 3/4 gallons, we can calculate the fraction of gas left using: 1−3/4=1/4.

so now we use the fraction we calculated to times with the total volume of gas : 1/4×16=4 gallons

6 0

3 years ago

If f(x)f(x) is an exponential function where f(1.5)=5f(1.5)=5 and f(7.5)=79f(7.5)=79, then find the value of f(3)f(3), to the ne

stiv31 [10]

Answer: $7.93$

Step-by-step explanation:

Given

$f(x)$ is an exponential function. Suppose $f(x)$ is $ae^{bx}$

$f(1.5)=5\ \text{and}\ f(7.5)=79$

$\Rightarrow 5=ae^{1.5b}\\\Rightarrow \ln 5=\ln a-1.5b\quad \ldots(i)$

Similarly,

$\Rightarrow 79=ae^{7.5b}\\\Rightarrow \ln(79)=\ln a+7.5b\quad \ldots(ii)$

Subtract (i) and (ii)

$\Rightarrow \ln (79)-\ln (5)=9b\\\Rightarrow \ln (\frac{79}{5})=9b\\\\\Rightarrow b=\dfrac{\ln (\frac{79}{5})}{9}\\\\\Rightarrow b=0.3066$

Insert the value of $b$

$\Rightarrow 5=ae^{0.46}\\\Rightarrow a=5\times 0.6312\\\Rightarrow a=3.156\approx 3.16$

So, the function becomes

$\Rightarrow f(x)=3.16e^{0.3066b}$

$\Rightarrow f(3)=3.16e^{0.3066\times 3}\\\Rightarrow f(3)=7.927\approx 7.93$

4 0

3 years ago

Read 2 more answers

Please help as soon as possible! Kia's plant is 8 1/5 inches tall and is growing 2/3 of an inch each week. Lyric's plant is 10 7

boyakko [2]

To find the answer, you find out the height of the plants for each week until they're the same.

Equation: Growth × Week + Original Height

For Kia: 2/3w + 8 1/5
For Lyric: 1/6w + 10 7/10
Kia:
Week 0 = 8 1/5 in.
Week 1 = 8 13/15 in.
Week 2 = 9 8/15 in.
Week 3 = 10 1/5 in.
Week 4 = 10 13/15 in.
Week 5 = 11 8/15 in.

Lyric:
Week 0 = 10 7/10 in.
Week 1 = 10 13/15 in.
Week 2 = 11 1/30 in.
Week 3 = 11 1/5 in.
Week 4 = 11 11/30 in.
Week 5 = 11 8/15 in.

Solution: 5 Weeks

6 0

4 years ago

What is the Math Curse

Serhud [2]

Answer:

Why did you delete my answer I was just confused

Step-by-step explanation:

8 0

3 years ago

How many degrees are there in each exterior angle of an equilateral triangle?

Mademuasel [1]

You know that it is an equliateral triange, so the interior angles are each 60 degrees. So the answer cannot be lower then 60. Finally.......

60 + 120 = 180.

So the answer is d. 120 degrees

8 0

3 years ago

Read 2 more answers