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2 years ago

can you solve the question but tell me how to do it I'm trying to study but don't know how to solve it?

Mathematics

2 answers:

nignag [31]2 years ago

7 0

Answer:

Step-by-step explanation:

they are opposite angles, therefore congruent

we solve with an equation

8x + 19 = 9x +9

19 - 9 = 9x - 8x

10 = 1x

x = 10

check

-------------------

8 * 10 + 19 = 9 * 10 + 9

80 + 19 = 90 + 9

<u><em>the answer is good</em></u>

Vedmedyk [2.9K]2 years ago

6 0

Answer:

8x+19=9x+9

Step-by-step explanation:

Simplifying

(8x + 19) = (9x + 9)

Reorder the terms:

(19 + 8x) = (9x + 9)

Remove parenthesis around (19 + 8x)

19 + 8x = (9x + 9)

Reorder the terms:

19 + 8x = (9 + 9x)

Remove parenthesis around (9 + 9x)

19 + 8x = 9 + 9x

Solving

19 + 8x = 9 + 9x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9x' to each side of the equation.

19 + 8x + -9x = 9 + 9x + -9x

Combine like terms: 8x + -9x = -1x

19 + -1x = 9 + 9x + -9x

Combine like terms: 9x + -9x = 0

19 + -1x = 9 + 0

19 + -1x = 9

Add '-19' to each side of the equation.

19 + -19 + -1x = 9 + -19

Combine like terms: 19 + -19 = 0

0 + -1x = 9 + -19

-1x = 9 + -19

Combine like terms: 9 + -19 = -10

-1x = -10

Divide each side by '-1'.

x = 10

Simplifying

x = 10

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8 0

3 years ago

Help me please thanks

Nadusha1986 [10]

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3 years ago

8 less than the product of 6 and -16

Pachacha [2.7K]

Answer:

-104

Step-by-step explanation:

Step 1: Write out expression

6(-16) - 8

Step 2: Evaluate

-96 - 8

-104

3 0

3 years ago

..................................

zhannawk [14.2K]

a = 6
b = 2
h = 3

<h3>Asked :</h3>

A = …?

<h3>Solution :</h3>

A = ½ (a + b) × h

A = ½ (6 + 2) × 3

A = ½ (8) × 3

A = 4 × 3

A = <u>12</u> square units.

6 0

3 years ago

A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.3

rusak2 [61]

Answer:

The claim is not true

Step-by-step explanation:

We are given that A local retailer claims that the mean waiting time is less than 8 minutes.

$H_0:\mu=8$

$H_a:\mu$

A random sample of 20 waiting times has a mean of 6.3 minutes with a standard deviation of 2.1 minutes.

$\bar{x}=6.3$

s = 2.1

n = 20

Since n <30 and population standard deviation is unknown

So,we will use t test

So, $t=\frac{x-\mu}{\frac{s}{\sqrt{n}}}$

$t=\frac{6.3-8}{\frac{2.1}{\sqrt{20}}}$

t=-3.62

α = 0.01

Degree of freedom = df=n-1=20-1=19

$t_{df,\frac{\alpha}{2}}=t_{19,\frac{0.01}{2}}=2.861$

t calculated < t critical

So, we failed to reject null hypothesis

Hence the claim is not true

8 0

4 years ago