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-BARSIC- [3]
2 years ago
8

The ratio of male students to female students in a class is 5:4. If the number of male students in the class is

Mathematics
1 answer:
beks73 [17]2 years ago
6 0

Answer:

The answer is 20

Step-by-step explanation:

In ratio what you do one side you do on the other side 5:4=25:20

5×5=25

4×5=20

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According to a Gallup survey conducted in July 2011, 20% of Americans favor reducing the U.S. budget deficit by using spending c
Yakvenalex [24]

Answer:

Option C is correct.

The test statistic for this question is -3.13

Step-by-step explanation:

To compute the z-test statistic, the formula is given as

z = (x - μ₀)/σₓ

x = p = sample proportion of the 500 college students sampled, that favor reducing the deficit using only spending cuts with no tax increase = (75/500) = 0.15

μ₀ = p₀ = the proportion to be compared against, that is, the proportion of Americans that favor reducing the U.S. budget deficit by using spending cuts only, with no tax increases = 20% = 0.20

σₓ = standard error of the sample proportion = √[p(1-p)/n]

p = 0.15

n = Sample size = 500

σₓ = √[0.15×0.85/500] = 0.01597

z = (0.15 - 0.20) ÷ 0.01597

z = -3.13

Hope this Helps!!!

8 0
3 years ago
Help! If you know this can you tell me how to do it?
aleksandr82 [10.1K]

Answer:

c

Step-by-step explanation:

Here's how this works:

Get everything together into one fraction by finding the LCD and doing the math.  The LCD is sin(x) cos(x).  Multiplying that in to each term looks like this:

[sin(x)cos(x)]\frac{sin(x)}{cos(x)}+[sin(x)cos(x)]\frac{cos(x)}{sin(x)} =?

In the first term, the cos(x)'s cancel out, and in the second term the sin(x)'s cancel out, leaving:

\frac{sin^2(x)}{sin(x)cos(x)}+\frac{cos^2(x)}{sin(x)cos(x)}=?

Put everything over the common denominator now:

\frac{sin^2(x)+cos^2(x)}{sin(x)cos(x)}=?

Since sin^2(x)+cos^2(x)=1, we will make that substitution:

\frac{1}{sin(x)cos(x)}

We could separate that fraction into 2:

\frac{1}{sin(x)}×\frac{1}{cos(x)}

\frac{1}{sin(x)}=csc(x)  and  \frac{1}{cos(x)}=sec(x)

Therefore, the simplification is

sec(x)csc(x)

5 0
3 years ago
Which of the expressions below can be factor using the difference of squares method
Law Incorporation [45]
25x^2 - 64y^2

The first thing you can do is look for a subtraction sign. The word difference implies subtraction, so you can rule out any expressions that add terms. Secondly, you can look for squares. 17x^2 - 23y^2 is a subtraction expression, but 17 and 23 are not squares. However, 25x^2 - 64x^2 is a subtraction expression and its terms are squares. 25 = 5x5, 64 = 8x8. Hope this helps!
5 0
3 years ago
A cube in Emily's closet where she stores her jewelry has a side length of 1 1/4 feet.
Gnom [1K]

<u>Answer:</u>

1.95 cubic feet

<u>Step-by-step explanation:</u>

We are given that Emily stores her jewelry in a cube and the cube has a side length of 1\frac{1}{4} feet.

1\frac{1}{4} feet in an decimal form is 1.25 feet.

We know that,

<em>volume of a cube = s^{3}</em>

where <em>s</em> is the side length of the cube.

So substituting this value of side length of cube in the formula to get:

Volume of cube = (1.25)^3 = 1.95 feet

3 0
3 years ago
Read 2 more answers
Please help me with this question! thank you :)
nikdorinn [45]

Answer:

2 + 2 = 0

Step-by-step explanation:

It's easy you are

kid‍♂️‍♂️‍♂️

3 0
2 years ago
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