Solve the Systems of equations algebraically 4x+5y=15
-4x+6y+7

Answers
A- (5/4, 2)
B- (2, 5/4)
C- (4/5,2)
D (2, 4/5)

Answers

Answer 1

Answer: STEP 1:
4x + 5y= 15
-4x + 6y= 7
add the two above equations; the x term cancels out; solve for y

11y= 22
divide both sides by 11

y= 2

STEP 2:
substitute the y value in step 1 into either original equation

4x + 5y= 15
4x + 5(2)= 15

4x + 10= 15
subtract 10 from both sides

4x= 5
divide both sides by 4

x= 5/4

ANSWER: (A) x= 5/4, y= 2 or (5/4, 2)

Hope this helps! :)

Answer 2

Answer:

Answer:

5/4, 2 or A on edge 2021

Step-by-step explanation:

took the test :)

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I don’t understand this!!! Can someone please explain it to me? ASAP! Thank you all even if you don’t know how to do it

Answers

Answer:

615.6

Step-by-step explanation:

First find the number of cubic feet.

V = B * h

B is a triangle with a right angle on your left and two 6 foot lengths on each leg.

Area = 1/2 b * h

b = 6 feet

h = 6 feet

Area = 1/2 * 6 * 6 = 18 square feet.

The volume = B * h

h = 11.4

B = 18 sq ft

Volume = 18 * 11.4

Volume = 205.2 Cubic Feet.

Each cubic foot costs 3.00 dollars

Cost = volume * cost/cu foot

Cost = 205.2 * 3

Cost = 615.6

What times what equals 23?

Answers

1*23 equals 23.
23 is a prime number so it doesn't have any factors besides 1 and itself.

1 x 23 because its a prime number

A math book comprises of 2 sections: arithmetic and geometry in the ratio 5:3. How much of each type of content will be needed to make a book of 480 pages?

Answers

As the ratio is 5:3, it totals 8 parts. I would do 480 divided by 8 to get the number of pages per part, then multiply that number into the ratio.
480 / 8 = 60
The value of each part being 60 put into the ratio 5:3 = 60x5 : 60x3
Which gives your answer.

Hope it helps :)

Answer:

300 pages of arithmetic and 180 pages of geometry

Step-by-step explanation:

Given,

The ratio of arithmetic content and geometric content = 5 : 3

Let the pages in arithmetic contents = 5x,

And, the pages in geometric content = 3x,

Where, x is a positive real number,

So, the total pages = 5x + 3x = 8x

According to the question,

8x = 480

⇒ x = $(480)/(8)$ = 60

Hence, the content of arithmetic = 5 × 60 = 300 pages,

While, the content of geometry = 3 × 60 = 180 pages,

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7 ft
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8 m
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9 in
9 in
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11 mi
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5 mi
6 mi
3 in
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Answers

Not sure because I don’t see the figures I’m supposed to find the volume of

24 kids in miss p class collected an average of 18balls.miss lees kids collected sn average of 21balls.how much more did miss lees kids collected.show all workings

Answers

miss lees class collected 3 more ball because 21-18 is 3. if i collect 18 balls and my friend collects 21 balls and then we add 21+18 we get 39 and then we put 39 in 13 equal groups we have 3in each group that is why they collected 3.
21-18=3
add 21+18=39
put in equal groups
divide 39 with 3 get thirteen make equal group get 3 in each group

*21-18=3
*21+18=39
*39 divided with 3=13
* 3 in each group
*Answer 3

What is 1.08333333333 in simplest fraction form?