All categories

2 years ago

Xavier (x) has $20 more than Sara (s). Their combined money totals $90. Which system of equations represents this situation?

Mathematics

1 answer:

borishaifa [10]2 years ago

8 0

Answer:

B) x + s = 90, x - s = 20

Step-by-step explanation:

x + s = 90 represents that both Xavier and Sara's money combined is $90.

x - s = 20 represents that Xavier has 20 more dollars than Sara.

You might be interested in

PLEASE HELP (WILL NAME BRAINLYEST)

ira [324]

Answer:

4.04 x 10^0 people/km^2 (x 10^0 is fairly redundant but if the answer is required in standard form then include it)

Step-by-step explanation:

Population Density = Population/Area

= 3.11 x 10^7 / 7.69 x 10^6

= 31,100,000 / 7,690,000

= 3110 / 769

= 4.04

= 4.04 x 10^0

7 0

2 years ago

(1-sin(x))(1+sin(x))=1/1+tan(x^2)<br> Prove that the statement is an identity

nekit [7.7K]

(1-sin(x))(1+sin(x))=1/1+tan(x^2)

I think the right side is tan^2 x ( the square of tan x)

Left side = 1 - sin^2 x

Right side = 1 / ( 1 + (sin^2 x / cos^2x))

= 1 / (cos^2x + sin^2x) / cos^2 x

Now sin^2 x + cos^2 x = 1 so

this = 1 / 1 / cos^2x

= cos^2x = 1 - sin^2 x = Left side - Proved

4 0

2 years ago

Find the correct plugged in formula for each figure.

Mars2501 [29]

Answer:

$Area = 40 ( 84)+ 2 *(294)$

Step-by-step explanation:

There is only one figure in the attached image and the solution (surface area) is as follows:

The shape can be sub-divided into:

1. Rectangle

Dimension: 40 by 35

2. Rectangle

Dimension: 40 by 28

3. Rectangle

Dimension: 21 by 40

4. 2 triangles

Base: 21 and Height: 28

Calculate area of each and add them up to get the surface area of the figure.

1. Rectangle

Dimension: 40 by 35

$A_1 = 40 * 35$

2. Rectangle

Dimension: 40 by 28

$A_2 = 40 * 28$

3. Rectangle

Dimension: 21 by 40

$A_3 = 40 * 21$

4. 2 triangles

Base: 21 and Height: 28

$A_4 = 2 * \frac{1}{2} * 21 * 28$

So, the area is:

$Area = A_1 +...+A_4$

$Area = 40 * 35 + 40 * 28 +40 * 21 + 2 * \frac{1}{2} * 21 * 28$

Factor out 40

$Area = 40 ( 35 + 28 + 21 )+ 2 * \frac{1}{2} * 21 * 28$

$Area = 40 ( 84)+ 2 * \frac{1}{2} * 21 * 28$

$Area = 40 ( 84)+ 2 *(294)$

8 0

2 years ago

Please help! Will mark brainliest if correct! Use the model attached to answer

iogann1982 [59]

Answer:

4 cubes will be shown in the right view of the model and the 1st option is the top view for the model.

6 0

2 years ago

Read 2 more answers

Would the inequality symbol flip around or stay the same 2x-3>5

meriva

Answer:

It would stay the same.

Step-by-step explanation:

You only switch it if you are dividing by a negative.

4 0

2 years ago

Read 2 more answers