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2 years ago

Y=3x-10 2x-5=y plz help me with this and show the work plz i need it for my test

1 answer:

6 0

Substitution Method:

3x - 10 = 2x - 5

3x = 2x + 5

x = 5

Now solving for y:

y = 3x - 10

y = 3(5) - 10

y = 15 - 10

y = 5

(x, y) = (5, 5)

Check answer:

5 = 3(5) - 10
5 = 15 - 10
5 = 5

5 = 2(5) - 5
5 = 10 - 5
5 = 5

Since all of the equalities are true, (5, 5) is a true solution

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The cost of making a shirt is half of what the shirt normally sells for. Today, the shirt is in a 15 percent discount from its n

Vaselesa [24]

Answer:

.85 times the cost to make the shirt

Step-by-step explanation:

Let x represent cost to make the shirt.

Today, the shirt is in a 15 percent discount from its normal price.

Discount = 15/100 * x = 0.15x

Current cost = Original cost - discount

Current cost = x - 0.15x = 0.85x

The answer is;

.85 times the cost to make the shirt

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2 years ago

For f left parenthesis x right parenthesis equals StartRoot x EndRoot and g left parenthesis x right parenthesis equals 4 x plus

lara31 [8.8K]

Answer:

Step-by-step explanation:

Given that there are two functions f and g as

$f(x) = \sqrt{x} \\g(x) =4x+9$

We have to find the composition of functions.

Composition functions are calculated as the first function inside bracket and then the outside function of answer inside.

a) $fog= f{g(x)} =f(4x+9) = \sqrt{4x+9}$

b) $gof = g{f(x)} = g(\sqrt{x} )=4\sqrt{x} +9$

c) $fof = f(\sqrt{x} ) = \sqrt[4]{x}$

d) $gog = g(4x+9) = 4(4x+9)+9\\= 16x+45$

4 0

3 years ago

In the parallelogram above what is the value of x?Please explain for brainlest

mihalych1998 [28]

E: 36 because the total degrees of a parallelogram is 360 and opposite angles of parallelogram’s are equal so the angles diagonal from the given ones are the same. So the corners are 3x, 2x, 3x, 2x. In total that is 10x. 360/10 = 36

4 0

2 years ago

What is the interquartile range of this data? 6 8 9

vladimir1956 [14]

Answer:

Step-by-step explanation:

Just subtract the first quartile form the third quartile.

third quartile - first quartile

32 - 8 = 24 IQR

FIRST quartile: 8

SECOND quartile: 20

THIRD quartile: 32

So the IQR is 24

Hope this helps :)

3 0

3 years ago

Read 2 more answers

A bowl contains 3 red, 8 blue, and 7 black beads. Margaret randomly selects 3 beads one after the other without replacement. Fin

castortr0y [4]

Since your second pick is affected by your first pick & your third pick is affected by the first two, it is dependent.

First pick: 18 marbles, 3 are red, so odds are 3/18 = 1/6

Second pick: 17 marbles, 8 are blue, odds are 8/17

Third pick: 16 marbles, 7 are black, odds are 7/16

<span>1/6 * 8/17 * 7/16 = 56/1632 = 7/204 & as mentioned before it's dependent</span>

3 0

3 years ago