All categories

3 years ago

Help plsssssssss ....

Mathematics

2 answers:

snow_lady [41]3 years ago

6 0

Answer:

tan

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan23° = $\frac{opposite}{adjacent}$ = $\frac{b}{4.5}$ ( multiply both sides by 4.5 )

4.5 × tan23° = b , then

b ≈ 1.9 ( to 1 dec. place )

erik [133]3 years ago

4 0

Tan is the right answer

hope it helps you ❣❣

<h2>Mark me as brainliest </h2>

You might be interested in

Will give the brains of me brains and my brains and maby ur brain to u how many brains can i give u if u ask this quetion right?

Ket [755]

Answer: 83.6

Step-by-step explanation:

The data shown below is: 81,83,84,85,85. The mean of this data set can be calculated via (81+83+84+85+85)/5=83.6

Hope it helps <3

P.S. brainliest brains?

7 0

4 years ago

rita is making chili. The recipe calls for 2 3/4 cups of tomatoes. how many cups of tomatoes written as a fraction greater than

juin [17]

2 ¾= 11/4 Fraction. greater than 1 is 5/4.So, two 5/4 fits in 11/4. So, answer is 2.

6 0

4 years ago

1. Find the 90% Cl for the population mean if sample

Elden [556K]

Answer:

The answer is below

Step-by-step explanation:

mean (μ) = 12, SD(σ) = 2.3, sample size (n) = 65

Given that the confidence level (c) = 90% = 0.9

α = 1 - c = 0.1

α/2 = 0.05

The z score of α/2 is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.65

The margin of error (E) is given as:

$E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.65*\frac{2.3}{\sqrt{65} } =0.47$

The confidence interval = μ ± E = 12 ± 0.47 = (11.53, 12.47)

mean (μ) = 23, SD(σ) = 12, sample size (n) = 45

Given that the confidence level (c) = 88% = 0.88

α = 1 - c = 0.12

α/2 = 0.06

The z score of α/2 is the same as the z score of 0.44 (0.5 - 0.06) which is equal to 1.56

The margin of error (E) is given as:

$E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.56*\frac{12}{\sqrt{45} } =2.8$

The confidence interval = μ ± E = 23 ± 2.8 = (22.2, 25.8)

8 0

3 years ago

Find the sum of -3x2 -4x+3 and 2x2-x+3

Alika [10]

Answer:

Assuming the 2 at the ends are the exponents,

the answer is -x^2-5x+6 (x^2+5x-6)

from here, it cannot be simplified more

Explanation --

Just add everything by putting the terms in parentheses and adding them.

Keep simplifying by putting the like terms together and adding/subtracting them.

At the end, you come up with -x^2-5x+6, so multiply -1 on the whole thing (by putting parentheses on its sides. This makes x positive. But they are the same thing, but this step is just for simplifying the end product a little more.

Hope this helps!! Have a nice day!

5 0

3 years ago

What is the slope between the point (0,0) and (3,-9)

Readme [11.4K]

Answer:

-3

Step-by-step explanation:

$m=\frac{y_{1}- y_{2}}{x_{1} -x_{2}} \\m=\frac{-9-0}{3-0} \\m=\frac{-9}{3} \\\\\m=-3$

5 0

3 years ago