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3 years ago

Y+2x=-1 y= 1/2x+4 value of x

Mathematics

1 answer:

STALIN [3.7K]3 years ago

6 0

X=2

I have an image showing all work

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Which quadratic function is represented by the graph?

forsale [732]

Answer:

Its b

Step-by-step explanation:

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3 years ago

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What is the ratio of the longer leg of a 30 60 90 triangle to its hypotenuse?

galben [10]

30: x
60: xsqrt3
90: 2x (hypotenuse)

7 0

3 years ago

Solve for j : j/-2+7=-12 j=?

schepotkina [342]

Answer:

$\huge\boxed{j=38}$

Step-by-step explanation:

$\dfrac{j}{-2}+7=-12\qquad\text{subtract 7 from both sides}\\\\\dfrac{j}{-2}+7-7=-12-7\\\\\dfrac{j}{-2}=-19\qquad\text{multiply both sides by (-2)}\\\\(-2)\!\!\!\!\!\!\!\diagup\cdot\dfrac{j}{-2\!\!\!\!\!\diagup}=(-2)(-19)\\\\j=38$

3 0

3 years ago

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Match the solution set given in inequality notation with the solution set given in interval notation.

sasho [114]

Answer:

x≤7.8 ⇒(-∞;7.8]

x<7.8 ⇒ (-∞;7.8)

x>7.8 ⇒ (7.8; ∞)

x≥7.8 ⇒ [7.8; ∞)

Step-by-step explanation:

Hi, to answer this question we have to analyze each expression:

• x≤7.8

The solution is all the numbers less or equal to 7.8, since it can be equal to 7.8, it includes 7.8 , we have to use closed brackets

(-∞;7.8]

• x<7.8

All the numbers less than 7.8 , it excludes the endpoint , it's an open interval (parenthesis)

(-∞;7.8)

• x>7.8

All the numbers higher than 7.8, open interval (parenthesis)

(7.8; ∞)

• x≥7.8

All the numbers higher or equal to 7.8, closed interval (closed brackets for the endpoint)

[7.8; ∞)

4 0

3 years ago

Does anyone from 7th grade and higher know this

zepelin [54]

We can combine thos fraction ssince same denomenator
$\frac{3y}{7}+ \frac{1}{7}= \frac{3y+1}{7}$

so
$\frac{3y+1}{7}= \frac{3}{7}$

times both sides by 7
3y+1=3
minus 1 both sides
3y=2
divide both sides by 3
y=2/3

6 0

3 years ago