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3 years ago

4-7r-8r=4 solve for r

Mathematics

1 answer:

Goshia [24]3 years ago

5 0

Step-by-step explanation:

or, 4-15r=4

or,4-4=15r

or,15r=0

or, r=0/15

therefore r=0 ans

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(16 – 8 ) x (10 + 4 ) + 8²

Ghella [55]

Hey there!

To solve for this given equation, you have to do is: PEMDAS.

PEMDAS means….

• Parentheses
• Exponents
• Multiplication
• Division
• Addition
• Subtraction

(You have to do it in that EXACT order or it will most likely mess up better understanding of the equation)

Now that we have information out of the way, we can answer the given question… shall we?

EQUATION:

(16 - 8 ) * (10 + 4 ) + 8^2

CAN CONVERT TO:

= (16 - 8)(10 + 4) + 8^2

SOLVING TO EASIER WAYS:

= (8)(14) + 8^2

= 8(14) + 8 * 8

= 8(14) + 64

= 112 + 64

SIMPLIFY IT:
= 176

Therefore, the answer should be: 176

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

3 0

3 years ago

Read 2 more answers

27^ 1/3 evaluate please help

zysi [14]

Answer:

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Lee is a teacher at a local high school who wanted to assess whether or not dogs physically resemble their owners enough for peo

frozen [14]

Answer:

The decision rule is

Reject the null hypothesis

The conclusion is

There is sufficient evidence to conclude that the population proportion of people who can correctly match a dog to their owner (out of two options) is better than just guessing

Step-by-step explanation:

From the question we are told that

The sample size is n = 16

The population proportion = 0.5

The number that of students that picked out the teachers dog is k = 14

Generally the sample proportion is mathematically represented as

$\^ p =\frac{k}{n}$

=> $\^ p =\frac{14}{16}$

=> $\^ p = 0.875$

The null hypothesis is $H_o : p = 0.5$

The null hypothesis is $H_o : p > 0.5$

Generally the test statistics is mathematically represented as

$z = \frac{\^ p - p }{\sqrt{ \frac{p(1- p )}{n} } }$

$z = \frac{0.875 - 0.50 }{\sqrt{ \frac{0.50 (1- 0.50 )}{16} } }$

$z = 3$

Generally the p-value is mathematically represented as

$p-value = P(Z > 3)$

From the z table the probability of Z>3 is mathematically represented as

$P(Z > 3) = 0.0013499$

$p-value = 0.0013499$

Let assume the level of significance is $\alpha = 0. 05$

Generally from the value obtained we see that $p-value < \alpha$ Hence

The decision rule is

Reject the null hypothesis

The conclusion is

There is sufficient evidence to conclude that the population proportion of people who can correctly match a dog to their owner (out of two options) is better than just guessing

3 0

4 years ago

The product of two consecutive integers is less than or equal to 27.

Ipatiy [6.2K]

Step-by-step explanation:

$x(x + 1) \leqslant 27 \\ {x}^{2} + x \leqslant 27 \\ {x}^{2} + x - 27 \leqslant 27 - 27 \\ {x}^{2} + x - 27 \leqslant 0$

so we got the equation

we solve it and we get:

(we floor the answers)

x = -5.72 -> -5

x = -4.72 -> 4

so:

maximum answer: 4 and 5

minimum answer: -5 and -4

7 0

4 years ago

What is the difrence<br>18.14and 9.88<br>

vodomira [7]

Answer:

8.26

Step-by-step explanation:

1. to do this you have to write down the two numbers, one under the other, with the decimal points lined up.

2. you also have to add zeros so the numbers have the same length.

3. and then subtract normally, remembering to put the decimal point in the answer.

8 0

3 years ago