I NEED HELP on this

Answers

Answer 1

Answer: the third choice is the correct one

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Kyle has 125 marbles. Fifty of these marbles are red and the reat are other colors. What is the ratio of the nunber of red marbles to the total of marbles expressed in simplest terms?

Answers

Answer:

The required simplest form is: $(2)/(5)$

Step-by-step explanation:

We have been given Kyle has 125 marbles.

And 50 out of total 125 are red and rest of them are other colours

that means other colour marble are 125-50=75

we need to find ratio of the number of red marbles to the total of marbles

The ratio is: $(50)/(125)=(2)/(5)$

The required simplest form is: $(2)/(5)$

Answer:

Step-by-step explanation:

2/5

A fisherman can row upstream at 4mph and downstream at 6mph. He started rowing upstream until he got tired and then started downstream to his start point. How far did the fisherman row if the trip took 3 hours?

Answers

Answer:

Fisherman traveled 14.4 miles.

Step-by-step explanation:

A fisherman's downstream speed = 6 mph

and upstream speed = 4 mph

Let the fisherman traveled x miles he travels upstream.

Time spent in travelling x miles = $(x)/(4)$ hours [Since time = $\frac{\text{distance}}{\text{speed}}$ ]

Similarly when fisherman covers x miles down stream

Time spent in x miles = $(x)/(6)$ hours

Now total time in going upstream and downstream is 3 hours then

$(x)/(4)+(x)/(6)=3$

x $((3+2)/(12))=3$

$((5x)/(12))=3$

5x = 12×3

5x = 36

x = $(36)/(5)=7.2$ miles.

Since fisherman has traveled 2x distance so the answer will be 14.4 miles

Therefore, fisherman traveled 14.4 miles.

total time = upstream time + downstream time
he rowed the same distance both ways.
upstream time = D/4
downstream time = D/6
total time = D/4 + D/6 = 3D/12 + 2D/12 = 5D/12 = 3 hours
D = 3*12/5 = 36/5 or 7.2 miles
where D is the one-way distance. The total distance he rowed is 2*D = 72/5 or 14.4 miles

Please help me? -4(7+2x)=-7x-33

Answers

Answer:x=5

Step-by-step explanation:

First we do the parenthesis

-4(7+2x)=-7x-33

To get

-28+-8x=7x+-33

and

-8x-28=-7x-33

Then we Add 7x to both sides.

-8x-28+7x=-7-33+7x

-x-28=-33

Then we Add 28 to both sides.

-x-28+28=-33+28

-x=-5

Lastly Divide both sides by -1.

-x/-1=-5/-1

X=5

answer is 5x

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What is 9+1 O.o plssssss help its in my 7th grade math question

Answers

Answer:

3738

Step-by-step explanation:

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Question 6 of 10Which of the following are solutions to the equation below?
Check all that apply
2x2 + 6x = 20
A. -5
B. 20
C. -2
D. 1
E. 2
F -10

Answers

Answer:

-5 and 2

Step-by-step explanation:

b , e , a are the correct answers

Write the first three terms of an arithmetic sequence if the fourth term is 10 and D = -6?

Answers

Answer:

First three terms = 28, 22, and 16

Step-by-step explanation:

The formula for the nth term of an arithmetic sequence is given by:

an = a1 + (n-1)d, where:

an is the nth term,
a1 is the first term,
n is the term position (e.g., 1st, 4th, etc.),
and d is the common difference.

Step 1: Find a1:

We can find a1 by substituting 10 for an, 4 for n, and -6 for d in the nth term formula:

10 = a1 + (4 - 1) * -6

10 = a1 + 3 * -6

(10 = a1 - 18) + 18

28 = a1

Thus, the first term is 28.

Step 2: Find a2 (the second term):

Now, we can find the second term by substituting 28 for a1, 2 for n, and -6 for d in the nth term formula:

a2 = 28 + (2 - 1) * -6

a2 = 28 + 1 * -6

a2 = 28 - 6

a2 = 22

Thus, the second term is 22.

Step 3: Find a3 (the third term):

Now, we can find the third term by substituting 28 for a2, 3 for n, and -6 for d in the nth term formula:

a3 = 28 + (3 - 1) * -6

a3 = 28 + 2 * -6

a3 = 28 - 12

a3 = 16

Thus, the third term is 16.

Step 4: Write the first three terms:

Therefore, the first three terms of the arithmetic series are 28, 22, and 16.