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3 years ago

Solve the system of equations by substitution y = 2x - 4 7x - 2y = 5

Mathematics

2 answers:

denis-greek [22]3 years ago

7 0

Answer:

Point form: ( -1 , -6)

Equation form: x= -1 , y= -6

u should mark brainliest ;)

Amanda [17]3 years ago

3 0

3x + 4 ,, hope i helped !!

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How many numbers are prime between 40 and 50?

natali 33 [55]

Step-by-step explanation:

Correct answer:

(The primes between 40 and 50 are 41, 43, and 47 - three.

6 0

3 years ago

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One day a store sold 30 sweatshirts. White ones cost $11.95 and yellow ones cost$11.50. In all, $349.95 worth of sweatshirts wer

bazaltina [42]

Yellow - 20
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3 years ago

8.) Write an inequality that can be used to represent this situation, where x represents Olivia’s sister’s age. (Short answer)

Bumek [7]

Answer:

The oldest age of Olivia’s sister can be 11 years.

Step-by-step explanation:

Given: Olivia’s sister’s age is x years.

To write: inequality that can be used to represent the given situation.

As Olivia is 6 years older than her sister,

Olivia's age $=x+6$

As the sum of their ages is no more than 28 years,

$x+(x+6)\leq 28\\2x+6\leq 28\\2x\leq 28-6\\2x\leq 22\\x\leq \frac{22}{2}\\ x\leq 11$

So, the oldest age of Olivia’s sister can be 11 years.

5 0

4 years ago

Dad is 4 times as old as his son Jim. In 10 years, Dad's age will be 20 years more than twice Jim's age. How old is Jim?

Jobisdone [24]

Answer:

Jim is 5, Dad is 20

Step-by-step explanation:

Since dad is 4 times as old as Jim that means 5 x 4=20 and in ten years Jim will be 15 and Dad will be 30 and 15 x 2 is 30.

Hope this helps!

3 0

3 years ago

Directions: Write each equation in slope intercept form (y = mx + b)

Gnesinka [82]

Answer:

Below.

I Hope it helps :)

Step-by-step explanation:

Slope intercept form :

y=mx+b

$2x + y = 1$

Slope intercept form :

$y = - 2x + 1$

Equation :

$x - 2y = 8$

Slope intercept form :

$- 2y = - x + 8$

$y = \frac{1}{2} x - 4$

$3x + 2y = 4$

Slope intercept form :

$2y = - 3x + 4 \\$

Divide through by 2

$y = - \frac{3}{2} x + 2$

Equation :

$x + 2y = - 4$

Slope intercept form :

$2y = - x - 4$

Divide through by 2

$y = - \frac{1}{2} x - 2$

$4x + y = 1$

Slope intercept form =

$y = - 4x + 1$

Equation :

$x + y = - 2$

Slope intercept form :

$y = - x - 2$

7 0

3 years ago

Solve the system of equations by substitution y = 2x - 4 7x - 2y = 5​

Solve the system of equations by substitution y = 2x - 4 7x - 2y = 5