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ycow [4]
3 years ago
5

Gary has a box of pencils. In the box, 7/21 of the pencils have been sharpened. Select the three fractions that are proportional

to the fraction of sharpened pencils in Gary’s box.
A) 1/3
B) 1/7
C) 12/4
D) 13/39
E) 14/42
F) 21/7
Mathematics
2 answers:
Luda [366]3 years ago
8 0

Answer:

A) 1/3 D) 13/39 E) 14/42

Step-by-step explanation:

hope this helps. brainliest please.

nikitadnepr [17]3 years ago
7 0
A, B, E. A) divide by 3 B)Divide by 7 E) Multiply by 2
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Pls help me if I cabbnnnnsbdhdhdjdjxjkxx
lakkis [162]

Answer:

33.49 mm³

Step-by-step explanation:

The formula of volume of sphere

=  \frac{4}{3} \pi {r}^{3}

The volume of the sphere

=  \frac{4}{3}  \times 3.14 \times  {2}^{3}

=  \frac{100.48}{3}

= 33.4933333...

= 33.49 mm³ (rounded to the nearest hundredth)

3 0
3 years ago
Determine which equation is belongs to the graph of the limacon curve below.
JulsSmile [24]

Answer: Option C.

Step-by-step explanation:

We have functions of r(θ)

In our graph, we can see that the minimum value of r is when θ = 0°, and the maximum value is when θ = 180°.

We also know that the graph is in the square (-5, 5)x(-5, 5) and you can see that the maximum radius is almost less than 5.

Then let's analyze the options:

A) r = 3 - 2*cos(θ)

the maximum is at the right angle, but the maximum is:

r = 3 -2*(-1) = 5, so this maximum value is bigger than the one in the graph.

B) r = 3 - sin(θ)

For the sin functions, the maximum and minimum do not correspond with the values i write earlier, so we can discard this option.

C) r = 3 - cos(θ)

The maximum is: r = 3 - (-1) = 4, so this may be the correct answer.

the minimum is r = 3 - 1 = 2,

this is a possible equation for our circle.

D) r = 2 - 2*cos(θ)

Here, when θ = 0, we have: r = 2 - 2*1 = 0, but in the graph we can see that the radius is not 0 when θ = 0, so we can discard this option.

So the only option that makes sense is option C.

8 0
3 years ago
5. A line has a slope of (-3/2) and a y-intercept of (-4). Write the equation of the line.
KATRIN_1 [288]

Answer:

Y=-3/2x-4

Step-by-step explanation:

Point slope form is

y=mx+b

mx is the slope

and b is the y-intercept

6 0
3 years ago
Pls help with a good explanation and show ur work will give brainleiest
lyudmila [28]
From the graph: there are 200 students overall. For the next 100, we can divide each number by 2 to find an estimate for how many with participate in MATH tutoring. 40 divided by 2 =20 students participating in MATH tutoring.

Part B- There are currently 55 students out of 200 in SCIENCE tutoring. We add 55 more for 400 = 110, add 55 more for 600=165, and then add half of 55 (27.5 or 28 because you CANNOT have half a student) for 700 students total. 55+55+55+28=193 students.
7 0
2 years ago
Reca was approved for a credit card that charges an apr of 26% what is her monthly interest rate?
Lesechka [4]

Answer:

i_m=0.01945 or 1.945%

Step-by-step explanation:

Term annual percentage rate(APR) is the annual interest rate charged ona financial year for a duration of one year. APR can be converted to weekly, monthly, daily or even semi-annual rates using the below formula.

Effective rate for period = (1 + annual rate)(1 / n of periods) – 1

Rate is given as:

i_m=(1+i)^\frac{1}{12}-1\\i_m=(1+0.26)^\frac{1}{12}-1\\i_m=0.01945

7 0
2 years ago
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