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4 years ago

Fine the value of X

Mathematics

2 answers:

makvit [3.9K]4 years ago

8 0

Answer:

Step-by-step explanation:

60/40=3/2

105/40+x = 3/2

105/70=3/2

x=70-40 = 30

denis23 [38]4 years ago

8 0

Answer:

x = 30

Step-by-step explanation:

60/40 = 45/x

Cross multiply.

60x = 40 × 45

60x = 1800

Divide both sides by 60.

x = 1800/60

x = 30

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Alona [7]

Answer:

$\boxed{- 12 {s}^{2} + 11st - 2 {t}^{2} }$

Step-by-step explanation:

$= > ( - 3s + 2t)(4s - t) \\ \\ = > - 3s(4s - t) + 2t(4s - t) \\ \\ = > ( ( - 3s) \times 4s )- (( - 3s) \times t) + (2t \times 4s) - (2t \times t) \\ \\ = > - 12 {s}^{2} - ( - 3st) + 8st - 2 {t}^{2} \\ \\ = > -12 {s}^{2} + 3st + 8st - 2 {t}^{2} \\ \\ = > - 12 {s}^{2} + 11st - 2 {t}^{2}$

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3 years ago

Is calculating his expenses from his work trip to San Francisco. Below is the expense log he kept while traveling.

Alika [10]

Answer:

Step-by-step explanation:

379.00 - 15.00 + 154.00 x 3 + 65.00 + 13.00 = 904

0.55 x 63 = 34.65

34.65 + 904 = 938.65

5 0

3 years ago

Read 2 more answers

How many multiples of 7 are less than 1270 and more than 950

Goryan [66]

Answer:

45 i think its right or 46

7 0

3 years ago

Which sentence correctly describes a data set that follows a normal distribution with a standard deviation of 4 and a mean of 14

denis-greek [22]

Answer:

Option (c) is correct.

68% of the data points lie between 10 and 18.

Step-by-step explanation:

Given : a normal distribution with a standard deviation of 4 and a mean of 14

We have to choose the sentence that correctly describes a data set that follows a normal distribution with a standard deviation of 4 and a mean of 14.

Since, given 68% data.

We know mean of data lies in middle.

And standard deviation is distribute equally about the mean that is 50% of values less than the mean and 50% greater than the mean.

So, 68% of data lies

mean - standard deviation = 14 - 4 = 10

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So, 68% of the data points lie between 10 and 18.

4 0

3 years ago

4x + 9 = 2x + 15 .. I need help

valkas [14]

Answer:

x = 3

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define Equation

4x + 9 = 2x + 15

Step 2: Solve for x

Subtract 2x on both sides: 2x + 9 = 15
Subtract 9 on both sides: 2x = 6
Divide 2 on both sides: x = 3

Step 3: Check

Plug in x into the original equation to verify it's a solution.

Substitute in x: 4(3) + 9 = 2(3) + 15
Multiply: 12 + 9 = 6 + 15
Add: 21 = 21

Here we see that 21 does indeed equal 21.

∴ x = 3 is the solution to the equation.

3 0

3 years ago