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4 years ago

Geometry the value of X

Mathematics

1 answer:

raketka [301]4 years ago

8 0

Since the symbol tells us the angle is 90 degrees we know the 4x and 5x add up to make 90 degrees.
Lets use this to make and form an equation

5x + 4x = 90
9x =90 (collect the x values)
x = 10 (divide both sides 9 to find what x is)

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Need help on math You have a meal at a restaurant. The sale tax is 8% . You leave a tip for the waitress that is 20% of the pret

DerKrebs [107]

Answer: $18

Step-by-step explanation:

Let x= Pretax price of the meal.

Given: Sales tax = 8%

Tip percent = 20%

As per given ,

Amount spent = ( Pretax price) + (Sales tax ) of (Pretax price) + (Tip percent)of (Pretax price)

= x+ 8% of x + 20% of x

= x +0.08+0.20x

= 1.28x

∵ Amount spent = $23.04

So,

$1.28x=23.04\\\\\Rightarrow\ x=\dfrac{23.04}{1.28}\\\\\Rightarrow\ x=18$

Hence, the pretax price of the meal= $18.

4 0

3 years ago

Identify each number as prime or composite. a. 16 b. 27 C. 13

lawyer [7]

A & B are composite while C is prime

4 0

3 years ago

Read 2 more answers

Please answer this question only if you know it! 25 points and brainliest!

krok68 [10]

Answer:

$\boxed{70^\circ}$

Step-by-step explanation:

Step 1. Calculate θ

$\begin{array}{rcll}70^{\circ} + \theta + 60^{\circ} & = & 180^{\circ} & \text{Angles of straight line}\\130^{^{\circ}} + \theta & = & 180^{\circ}} & \\\theta & = & 50^{\circ} & \\\end{array}$

Step 2. Calculate x

$\begin{array}{rcll}60^{\circ} + \theta + x & = & 180^{\circ} & \text{Interior angles of triangle}\\60^{\circ} + 50^{\circ} + x & = & 180^{\circ} &\\110^{^{\circ}} + x& = & 180^{\circ} & \\\\x & = & \boxed{70^\circ} & \\\end{array}$

4 0

3 years ago

Marley has marbles of the same size and shape in a bag. There are 2 green, 5

mars1129 [50]

Answer:

B.) 1/15

Step-by-step explanation:

10 total marbles
3/10 - 1/1 = 2/9
3/10 × 2/9 = 1/15

6 0

3 years ago

write two linear functions, f(x) and g(x). For example, f(x)= 3x-7 and g(x)= -2x+5. Then see whether f(x) - (-g(x)) is equivalen

sweet [91]

Answer:

the two expressions are equivalent.

Step-by-step explanation:

We know that f(x)= 3x-7 and g(x)= -2x+5, therefore:

f(x) - (-g(x)) = 3x-7 - ( +2x-5) = 3x - 7 - 2x + 5 = x -2

f(x) + g(x) = 3x-7 -2x + 5 = x - 2

Therefore, f(x) - (-g(x)) is equivalent to f(x) + g(x).

Another way to check that the two expressions are equivalent is by solving the parenthesis:

f(x) - (-g(x)) → f(x) + g(x)

Therefore, the two expressions are equivalent.

8 0

3 years ago