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enyata [817]
3 years ago
10

What value makes 3(a+1.5)= -1.5 true

Mathematics
1 answer:
Reika [66]3 years ago
3 0
First, write the equation:
3(a+1.5) = -1.5
Next, you can distribute 3 into the parentheses by multiplying 3 by a and 1.5. It should look like this:
3a + 4.5 = -1.5
When trying to find the value of a variable, you want to get the variable to one side of the equation by itself. Subtract 4.5 from both sides of the equation to get:
3a = -6
Now, divide both sides by 3 to get your final answer:
a= -2
The value that makes the equation true is -2
Hope this helped!
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david is buying a cheese wheel priced at $650 before tax. the store charges 8% sales tax. what is the total price including tax,
Marina CMI [18]
I think he pays $702.

Basically,

650 • .08 (move the decimal over two to the left, that’s what you get) = 52. Then I did 650 + 52 and got $702.
6 0
3 years ago
Compute z-score. Given ~ n(12,2.5),find z score when x =17
Anestetic [448]

Answer:

The desired z-score is 2.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

n(12,2.5)

This means that \mu = 12, \sigma = 2.5

z score when x =17

This is Z when X = 17. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{17 - 12}{2.5}

Z = 2

The desired z-score is 2.

3 0
3 years ago
Name the property used in each equation. Then find the value of N. <br><br> 7+(4+6)=7+n
Xelga [282]
Hi there!

Let's solve th' Eqn. :-

7 + (6 + 4) = 7 + n

⇒ 7 + 10 = 7 + n

⇒ n = 7 - 7 + 10 ⇒ n = 10

Hence,
The required answer is " n " = 10

\bf{COMMUTATIVE\:} :-

Th' Commutative property states that the order of the terms does not affect the final result.

~ Hope it helps!
5 0
3 years ago
I need help on this question:
lara [203]
2x+2x+7x+7x= 18x

18x= perimeter

a triangle has 3 sides

18x÷3=6x

one side of the triangle=6x
6 0
3 years ago
Clyde simplified ( j^-8)^-2
Lina20 [59]

ANSWER

{j}^{16}

EXPLANATION

The given expression is

( {j}^{ - 8} )^{ - 2}

To simplify this expression, we use the law of exponents.

Recall that:

{(a}^{m} )^{n}  =  {a}^{mn}

We need to multiply the exponents to get:

( {j}^{ - 8} )^{ - 2}  = {j}^{ - 8 \times - 2}

( {j}^{ - 8} )^{ - 2}  = {j}^{16}

Therefore after simplification, Clyde got:

{j}^{16}

5 0
3 years ago
Read 2 more answers
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