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3 years ago

Please help, I'll mark Brainiest. It's 8th grade math

Mathematics

2 answers:

yawa3891 [41]3 years ago

7 0

Answer:

(-5, 2)

Step-by-step explanation:

plug x into the equation x - 5y = -15

-5 - 5y = -15

add 5 to both sides: -5y = -10

divide by -5: y = 2

svetlana [45]3 years ago

7 0

Correct Answer:

(5, 4)

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Which three expressions are equivalent to 10x +11

BARSIC [14]

Answer:

B, C, and E

Step-by-step explanation:

Simplify all answer choices:

5(2x+10)+1=

10x+50+1=

10x+51

7(x+2)+3x-3=

7x+14+3x-3=

10x+11

3(3x+4)+x-1=

9x+12+x-1=

10x+11

2(6x+4)+2x+5=

12x+8+2x+5=

14x+13

2(6x+5)-2x+1=

12x+10-2x+1=

10x+11

Answer choices B, C, and E simplify to 10x+11

8 0

3 years ago

The denominator of a fraction is 4 more than the numerator if both are decreased by 3 the simplified result is 6/7 find original

Hitman42 [59]

Answer:

The denominator of a fraction is 4 more than the numerator. The original fraction is $\frac{27}{31}$

Solution:

Given that

Denominator of fraction is 4 more than the numerator.

Let’s say numerator of fraction be represented by variable x.

So denominator of a faction as it is four more that numerator will be x + 4

Also given if both decreased by three than simplified result is $\frac{6}{7}$

$=>\frac{(x-3)}{((x+4)-3)}=\frac{6}{7}$

Solving above equation for x

=> 7(x – 3 ) = 6 ( x + 1 )

=> 7x – 21 = 6x + 6

=> 7x – 6x = 6 + 21

=> x = 27

Numerator of fraction = x = 27

Denominator of fraction = x + 4 = 27 + 4 = 31

$\text {required fraction}=\frac{\text {numerator}}{\text {denominator}}$

$= \frac{27}{31}$

Hence the original fraction is $\frac{27}{31}$

7 0

4 years ago

) Fred buys a video game disk for $4. There was a discount of 20%.What is the sales price?

dolphi86 [110]

Answer:

so 4 dollars is discount

100-20=80 so

4 dollars =80%

1 dollar=20%

80+20=100

4+1=5

original price=$5

6 0

3 years ago

Read 2 more answers

The equation, y = 1250x + 22,850, gives the salary of a person as "y" after the stated number of years (x). Model the data with

Sidana [21]

Answer:

(a) $y = 6250x +17850$ --- The function

(b) $y = 49100$ --- The salary in 5 years

Step-by-step explanation:

Given

$y = 1250x + 22850$

Solving (a): Model the function around (1,24100) and (3,36600)

First, we calculate the slope

$m = \frac{y_2 - y_1}{x_2 - x_1}$

$m = \frac{36600 - 24100}{3 - 1}$

$m = \frac{12500}{2}$

$m = 6250$

The function is then calculated as:

$y = m(x - x_1) + y_1$

$y = 6250(x - 1) + 24100$

$y = 6250x - 6250 + 24100$

$y = 6250x +17850$

Solving (b): Salary in 5 years

Here:

$x = 5$

So:

$y = 6250x +17850$

$y = 6250*5 +17850$

$y = 49100$

8 0

3 years ago

Help? thank you <3

Oliga [24]

Answer:

Equation would be y=0x+2.

Step-by-step explanation:

b = 2

m = 0

using the formula,

y=mx+b

or, y = 0x+2

or, y = 0+2

so, y = 2

5 0

2 years ago