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3 years ago

Eric earned 60 points on his last test. If there was 75 possible points, WHAT was his PERCENT grade?

Mathematics

2 answers:

e-lub [12.9K]3 years ago

5 0

Answer:

Step-by-step explanation:

Eric-- 60/75

Percentage of Eric ---- 60/75 *100

Eric got 80 percentage in his last test.

Alik [6]3 years ago

5 0

Answer:

Step-by-step explanation:

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Can someone please help me with this

natta225 [31]

Answer:

$(a)\ (1,5)$

Step-by-step explanation:

Given

$(x + 9)^2 + (y - 4)^2 = 101$

Required

Which of the points does it pass through

To do this, we simply substitute the values of x and y in the above equation.

So, we have:

$(a)\ (1,5)$

$(x + 9)^2 + (y - 4)^2 = 101$

$(1 + 9)^2 + (5 - 4)^2 = 101$

Solve each bracket

$10^2 + 1^2 = 101$

$100 + 1 = 101$

$101 = 101$

The above equation is true,

<em>Hence, it passed through </em> $(1,5$ )

<em>We do not need to check for others</em>

6 0

3 years ago

Please help. 20 points and brainliest.

storchak [24]

Answer:

choce 3

Step-by-step explanation:

you can add n = 1,2,3,4 ....

you will receive the values as 1, 1/2, 1/4, 1/7

........

a⁰ = 1

5⁰ = 1

5 0

4 years ago

Please help me look at the attachment for the question

LenaWriter [7]

Found this when I was doing my own work, hope this helps.

6 0

3 years ago

A recent CBS News survey reported that 64% of adults felt the U.S. Treasury should continue making pennies. Suppose we select a

enyata [817]

Complete Question

A recent CBS News survey reported that 64% of adults felt the U.S. Treasury should continue making pennies. Suppose we select a sample of 18 adults.

a-1. How many of the 18 would we expect to indicate that the Treasury should continue making pennies

a-2) What is the standard deviation?

a-3) What is the likelihood that exactly 3 adults would indicate the Treasury should continue making pennies?

Answer:

a-1 $\= x = 11 .52$

a-2 $\sigma = 2.036$

a-3 $P(3) = 4.7*10^{-5}$

Step-by-step explanation:

From the question we are told that

The sample size is $n = 18$

The proportion of adult that felt the U.S. Treasury should continue making pennies is p = 0.64

The proportion of adult that feel otherwise is

$q = 1- p = 1-0.64 = 0.36$

The mean is mathematically evaluated as

$\= x = n * p$

substituting values

$\= x = 18 * 0.64$

$\= x = 11 .52$

The standard deviation is mathematically represented as

$\sigma = \sqrt{ npq}$

substituting values

$\sigma = \sqrt{18 * 0.64 * 0.36}$

$\sigma = 2.036$

The likelihood that 3 adult would indicate the Treasury should continue making pennies is mathematically evaluated as

$P(3) = \left n} \atop \right. C_3 (p)^{3} * (q)^{n-3}$

Now

$\left n} \atop \right. C_3 = \frac{n! }{[n-3] ! 3!}$

substituting values

$\left n} \atop \right. C_3 = \frac{18! }{[15] ! 3!}$

$\left n} \atop \right. C_3 = \frac{18 * 17 * 16 * 15! }{[15] ! (3 *2 *1 )}$

$\left n} \atop \right. C_3 = \frac{18 * 17 * 16 }{ (3 *2 *1 )}$

$\left n} \atop \right. C_3 = 816$

$P(3) = 816 * (0.64 )^3 * (0.36 )^{18-3}$

$P(3) = 4.7*10^{-5}$

8 0

3 years ago

Question 17

RoseWind [281]

Answer:

Perpendicular

Step-by-step explanation:

Remember that:

Two lines are parallel if their slopes are the same.
Two lines are perpendicular is their slopes are negative reciprocals.
And two lines are neither (a.k.a intersecting) if they are neither parallel nor perpendicular.

So, let's find the slope of QR and ST.

QR)

We can use the slope formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Let Q(-6, 11) be (x₁, y₁) and R(2, -1) be (x₂, y₂). Substitute:

$m=\frac{-1-11}{2-(-6)}$

Subtract:

$m=-12/8=-3/2$

So, the slope of QR is -3/2.

ST)

Let S(-4, 8) be (x₁, y₁) and T(-1, 10) be (x₂, y₂). Substitute:

$m=\frac{10-8}{-1-(-4)}$

Subtract:

$m=2/3$

So, the slope of ST is 2/3.

The negative reciprocal of -3/2 is 2/3.

And the negative reciprocal of 2/3 is -3/2.

So, the slopes are indeed negative reciprocals of each other.

So, QR and ST are perpendicular.

7 0

3 years ago

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