MATHEMATICS HIGH SCHOOL

What is the value of x in the equation 4(2x + 10) = 0?−5

−7

5

7

Answers

Answer 1
Answer: 4(2x+10)=0
8x+40=0
8x=-40
x=-40/8
x=-5
Answer 2
Answer:

Answer:

x = -5

Step-by-step explanation:

i checked it with photo math

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When you use place value to exchange equal amounts when renaming number, what are you doing?

Answers

The correct answer for the given question above would be REGROUPING. When you use place value to exchange equal amounts when renaming number, you are regrouping. Hope this answer helps. Thank you for posting your question. Let me know when you need more help.

Two solutions of different concentrations of acid are mixed creating 40 mL of a solution that is 32% acid. One-quarter of the solution is made up of a 20% acid solution. The remaining three-quarters is made up of a solution of unknown concentration, c.Which equation can be used to determine c, the unknown concentration?

Answers

Taking the 3 solutions as 3 different terms, we can create an equation as follows:

Solution 1 : 10mL with 20% acid
Solution 2 : 30mL with x% acid
Solution 3 : 40mL with 32% acid

Since solution 1 + solution 2 = solution 3, let us substitute the given values we have:

10(0.2) + 30(x) = 40(0.32)
2 + 30x = 12.8

To solve for the unknown concentration x, we subtract 2 from both sides:
2 + 30x - 2 = 12.8 - 2
30x = 10.8

Dividing both sides by 30:
30x/30 = 10.8/30
x = 0.36

Therefore the unknown solution is 36% acid.

Answer:

Therefore the unknown solution is 36% acid.

Step-by-step explanation:

True or false An invalid statistical test measure may have questions that are misinterpreted.

Answers

Answer: True.


Step-by-step explanation:  The motive of all statistical tests is to check whether all the variables or unknown quantities we are using in the test are independent of each other or are related among themselves.

Also, when we write an article, we should always check whether the statistical test we are using is suitable for the type of data concerned or not.

Furthermore, if a statistical test come out to be invalid, then it may be possible that there are some questions that are misinterpreted.

Thus, the answer is true.
True. An invalid statistical test measure may have questions that are misinterpreted.

Solve the following inequality for Y.5(y+6)+2y 9

A)y>9
B)y -9
D)y<-9

I give 47 points

Answers

Answer:

y > -3

Step-by-step explanation:

I will assume the sign you are missing is ">"

5(y + 6) + 2y > 9

~Simplify left side

5y + 30 + 2y > 9

~Combine like terms

30 + 7y > 9

~Subtract 30 to both sides

7y > -21

~Divide 7 to both sides

y > -3

Best of Luck!

Answer:

A because y=-5

Step-by-step explanation:

The 2015 senior class from Puma High School raised funds for an end of the year party at Club Sizzle. If costs $4,000 to rent out Club Sizzle plus $20 per student for food and drinks. If the senior class raised $11,000, how many students can attend the end of year party?

Answers

Answer:

There are 350 students that will be able to go to the party

Step-by-step explanation:

First we must analyze the statement and build a equation based on that, for do that, we will divide the statement a take the information.

1. The 2015 senior class raised funds of $11,000: we will represent this incomes with with a T, so:

T = 11,000

2. The cost to rent out the club sizzle is $4,000 and we will represent this cost with a C, so:

C = 4000

3. The cost per students is $ 20 and we will represent this with a S, then:

S = 20

The question is: how many students can attend, to the party so, we will form the equation:

C + S*X = T

Where X is the number of students that can attend to the party. This equation means that the cost of the club plus 20 dollars per person have to be equal to 11,000.  

Replacing values of T, C and S, we get:

$4,000 + $20*X = $11,000

Now, we will solve for X

20*X = 11000-4000

X = (11000-4000)/20

X = 350

Finally, 350 students will be able to go to the party.

$11,000-$4,000=$7,000
$7,000/$20=350
350 students can attend the end of the year party

For the data in the table does y vary directly with x? If it does write an equation for the direct variation X Y
16 4
32 16
48 36

A)yes; y=2x
B)yes; y=1/4x
C)yes; y=1/8x
D) No; y does not vary directly with x

Answers

Answer:

D) No; y does not vary directly with x.

Step-by-step explanation:

We can affirm that y varies directly with x, that is, that y is directly proportional to x if they fulfill the following condition.

y/x = k

where,

k is a constant number

We have 3 ordered pairs:

a) (16, 4)

b) (32, 16)

c) (48, 36)

If we perform y/x for each ordered pair,

a) 4/16 = 0.25

b) 16/32 = 0.50

c) 36/48 = 0.75

Since y/x is not constant, y does not vary directly with x.
I think the answer is D because when I try to solve them they don't equal each other
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