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2 years ago

Two numbers x and y, have a sum of 23 and a difference of 7. x is greater than y

Mathematics

2 answers:

Anna11 [10]2 years ago

8 0

Step-by-step explanation:

this is what you are told in the problem

x+y=23............1 (the sum)

x-y=7.................2 (the difference)

PS make sure to number your equations

in equation 1 we can take x over so that we form a new equation labelled equation 3

y=23-x...........3

sub 3 into 2

x-(23-x)=7

x-23+x=7

2x=7+23

2x=30

x=15.........4

sub 4 into 1

15+y=23

y=23-15

y=8

Verizon [17]2 years ago

7 0

Answer:

Below in bold.

Step-by-step explanation:

Use the elimination method:

a. x + y = 23

x - y = 7

b. Adding the 2 equations eliminates y, so we have

2x = 30

x = 15.

Substitute x = 15 in equation a:

15 + y = 23

y = 23 - 15

y = 8.

Answer x = 15, y = 6.

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Jason bought 12 new CDs to add to his

BabaBlast [244]

Answer:

He had origanlly had 68 altogether

Step-by-step explanation:

Because if u count the scrateched ones which was 6 is now 62 then add the other six because there was 12 and his brother scrateched half which is basically 12 / 2 = 6 so if u add the six is 68

What Im basically saying is 56 + 12 = 68

5 0

2 years ago

Find the amount of empty space within a cylinder containing three solid spheres, where each sphere has a radius of 3 cm. (Volume

aalyn [17]

Answer : The correct option is, (A) $54\pi cm^3$

Step-by-step explanation :

First we have to calculate the volume of cylinder.

Formula used:

Volume of cylinder = $\pi r^2h$

where,

r = radius = 3 cm

h = height = 18 cm (We are assuming that 3 solid spheres stacked to each other = 3 × diameter of each sphere = 3 × 2 × 3 = 18)

Volume of cylinder = $\pi (3cm)^2\times (18cm)$

Volume of cylinder = $162\pi cm^3$

Now we have to calculate the volume of 3 solid spheres.

Formula used:

Volume of 3 spheres = $3\times \frac{4}{3}\pi r^3$

Volume of 3 spheres = $4\pi r^3$

Volume of 3 spheres = $4\pi (3)^3$

Volume of 3 spheres = $108\pi cm^3$

Now we have to calculate the amount of empty space within a cylinder.

Amount of empty space within a cylinder = Volume of cylinder - Volume of 3 spheres

Amount of empty space within a cylinder = $162\pi cm^3-108\pi cm^3$

Amount of empty space within a cylinder = $54\pi cm^3$

Therefore, the amount of empty space within a cylinder is, $54\pi cm^3$

5 0

3 years ago

Guess what... I need more help again...!!1

Vesna [10]

Answer:

Associative Property of Multiplication

Step-by-step explanation:

Definition:

Changing the grouping of the factors, but does not change the value of the product.

Example:

(2x4)x6 = 2x (4x6)

<em>Hope this helps!:)</em>

8 0

2 years ago

Six is less than or equal to the sum of 4 and -2x

lukranit [14]

6 ≤ 4 + (-2x)
6 (-4) ≤ 4 - 2x - 4
4 and 4 cancels out
2 ≤ -2x

-1≥x

When you divide by a negative number, the inequality sign turns to the other side.

3 0

3 years ago

Find the distance between the points (1,3) and -7,2

Mashutka [201]

Answer:

I believe it is 59. Does it not give you any chooses?

Step-by-step explanation:

13 -72

6 0

3 years ago