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3 years ago

Maggie answered 20 out of 25 questions correctly on a math test. What percent of the questions did she answer correctly?

Mathematics

2 answers:

Marina86 [1]3 years ago

4 0

20/25 x 100 —> 2000/25 = 80%

Karolina [17]3 years ago

3 0

Answer:

80%

Step-by-step explanation:

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Each student in a classroom has chosen either a green, red, or blue marble and written their initials on it. In addition, some o

scoundrel [369]

A. 2/5 B. 1/3 just like the other person said lol

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2 years ago

Which equation matches the given points? (0, 7.6), (1, 6.2), (2, 4.8), (3, 3.4), (4,2)

Cerrena [4.2K]

The equation that matches the given points is g(x) = -1.4x + 7.6

The standard form of a linear equation is expressed as $g(x)=mx + b$

m is the slope of the line

b is the y-intercept:

Using the coordinate points (3, 3.4), (4,2)

$m=\frac{2-3.4}{4-3}\\m=\frac{-1.4}{1}\\m=-1.4$

Substitute m = -1.4 and the coordinate (4, 2) into the formula:

$2=4(-1.4)+b\\2=-5.6+b\\b=2+5.6\\b=7.6$

Get the required equation:

$g(x)=mx+b\\g(x)=-1.4x+7.6$

Hence the equation that matches the given points is g(x) = -1.4x + 7.6

Learn more on equation of a line here; brainly.com/question/9351428

4 0

2 years ago

Read this E[2X^2 â€" Y].

djyliett [7]

Looks like a badly encoded/decoded symbol. It's supposed to be a minus sign, so you're asked to find the expectation of 2X ² - Y.

If you don't know how X or Y are distributed, but you know E[X ²] and E[Y], then it's as simple as distributing the expectation over the sum:

E[2X ² - Y] = 2 E[X ²] - E[Y]

Or, if you're given the expectation and variance of X, you have

Var[X] = E[X ²] - E[X]²

→ E[2X ² - Y] = 2 (Var[X] + E[X]²) - E[Y]

Otherwise, you may be given the density function, or joint density, in which case you can determine the expectations by computing an integral or sum.

6 0

2 years ago

Based on the graph below, what is the y-intercept?

Sphinxa [80]

Answer:

the y intercept you are looking for is -3

4 0

2 years ago

Six added to 3 times a number is equal to 4 less than 5 times the number. What is the number?

harina [27]

Answer:

$5$

Step-by-step explanation:

Let the number be $x$ .

$3x+6=5x-4$

$3x-5x=-4-6$

$-2x=-10$

$2x=10$

$2x/2=10/2$

$x=5$

The number is 5.

8 0

2 years ago

Read 2 more answers

Maggie answered 20 out of 25 questions correctly on a math test. What percent of the questions did she answer correctly?​

Maggie answered 20 out of 25 questions correctly on a math test. What percent of the questions did she answer correctly?