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2 years ago

When simplified, 9x-(x+4) is what

Mathematics

1 answer:

laila [671]2 years ago

3 0

Answer:

4 (-1 + 2 x)

Step-by-step explanation:

Simplify the following:

9 x - (x + 4)

-(x + 4) = -x - 4:

9 x + -4 - x

Grouping like terms, 9 x - 4 - x = (9 x - x) - 4:

(9 x - x) - 4

9 x - x = 8 x:

8 x - 4

Factor 4 out of 8 x - 4:

Answer: 4 (-1 + 2 x)

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Task 1 Nonlinear Systems of Equations Create a system of equations that includes one linear equation and one quadratic equation.

Luden [163]

Answer:

hope this helps

Step-by-step explanation:

solution:

x^2 + 3x + 5 = x + 13

x^2 + 2x -8 = 0

(x+4)(x-2) = 0

x = -4 or x = 2

if x = -4, y = 9

if x = 2 , y = 15

4 0

3 years ago

Last year 64 new houses were built in a neighborhood so far this year 7/8 of them have been sold how many new houses have been s

laiz [17]

Answer:

Step-by-step explanation:

for this problem you would first figure out what 1/8 of 64 is. 1/8 of 64 is 8.so we do 7*8 to get 56 so 56 of the 64 houses have been sold

6 0

2 years ago

The 2 triangles below are similar. Solve for X please!

AysviL [449]

Answer:

C) x = 12

Step-by-step explanation:

We can calculate the value of x using similarity ratio

x/8 = 9/6 cross multiply expressions

6x = 72 divide both sides by 6

x = 12

8 0

3 years ago

What is the basic ratio for 25:40

Rashid [163]

The basic ratio of 25:40 would be 5:8.

Since 25:40 is equivalent to the fraction 25/40, you would simplify.

25 (divided by) 5 = 5

40 (divided by) 5 = 8

So, the answer is 5:8.

6 0

3 years ago

Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.

oksian1 [2.3K]

Answer:

0.36 = 36% probability that the land has oil and the test predicts it

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

45% chance that the land has oil.

This means that $P(A) = 0.45$

He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil.

This means that $P(B|A) = 0.8$

What is the probability that the land has oil and the test predicts it?

This is $P(A \cap B)$ . So

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

$P(B \cap A) = P(B|A)*P(A) = 0.8*0.45 = 0.36$

0.36 = 36% probability that the land has oil and the test predicts it

5 0

2 years ago