All categories

3 years ago

Can u help me please?

Mathematics

1 answer:

never [62]3 years ago

6 0

Answer:

1. x = -15

2. x = 0.25 or x = 1/4

Step-by-step explanation:

8 + 9.8x + 9 = 3.8x - 16 + 3.8x

Simplify both sides

17 + 9.8x = 7.6x - 16

-17 -17

9.8x = 7.6x - 33

-7.6x -7.6x

2.2x = -33

Divide by 2.2

x = -15

-2x - 10 = -14x - 7

+7 +7

-2x - 3 = -14x

+2x +2x

-3 = -12x

Divide by -12

0.25 = x

x = 0.25 or x = 1/4

You might be interested in

An EPA contractor needs to test the concentration of a substance in ten samples of the ground water. Seventy samples were

olga55 [171]

Answer:

Systematic sampling

Step-by-step explanation:

An EPA contractor needing to test the concentration of a substance in ten samples out seventy samples provided form a single source at regular time intervals.

For the contractor to effectively carry out the testing he has to employ a Non-probability system of sampling which is called Systematic sampling, because in systematic sampling we can assume the population size (x ) which in this case is 70 and the sample size( n ) to be 10

He will have to select ; ( x / n )^th of the sampling frame for best results

7 0

3 years ago

If a jogger runs 2 miles and burns 185 calories, how many calories would he burn if he jogged 3 miles?

aliina [53]

The total amount of calories burnt in jogging 2 miles = 185 calories

We have to determine the number of calories burned in jogging 3 miles.

Firstly, we will determine the amount of calories burnt in jogging 1 mile. We will use unitary method to evaluate this.

So, the total amount of calories burnt in jogging 1 mile = $185 \div 2$

= 92.5 calories

So, the amount of calories burnt in 3 miles = $3 \times 92.5$

= 277.5 calories

Therefore, 277.5 calories are burned in jogging 3 miles.

6 0

4 years ago

Read 2 more answers

Records show that 12% of all college students are foreign students who also smoke. It is also known that 40% of all foreign coll

Sati [7]

Answer: the percent of the students at this university are foreign = 30%

Step-by-step explanation:

Given: Probability that college students are foreign students who also smoke: P(S|F)=0.12

Probability that foreign college students smoke P(S∩F)=0.4

The probability that the students at this university are foreign :

$P(F)=\dfrac{P(S\cap F)}{P(S|F)}$ [By conditional probability formula]

$=\dfrac{0.12}{0.4}\\\\=0.3$

Hence, the percent of the students at this university are foreign = 30%

6 0

3 years ago

The nth term of a sequence is 2n2² - 4n+4 Work out the 8th term of the sequence. 8th term= Submit Answer Skip for Now

Marrrta [24]

The nth term of a sequence exists 2n2² - 4n+4 is 36.

<h3>What is PEMDAS' order of operations?</h3>

The order of operations exists as a rule that describes the right sequence of measures for estimating a math expression. We can recognize the order utilizing PEMDAS: Parentheses, Exponents, Multiplication, and Division (from left to right), Addition, and Subtraction (from left to right).

$$2*8*2^{2} - 4*8+4$

Follow the PEMDAS order of operations

Calculating the exponents, we get 2² = 4

$= 2*8*4 - 4*8+4$

= 64-32 +4

= 36

Therefore, the nth term of a sequence that exists 2n2² - 4n+4 is 36.

To learn more about sequences refer to:

brainly.com/question/8662453

#SPJ9

6 0

2 years ago

Plz help I will give brainiest, how would you solve 4x + 2y = 18 3x - 5y = 20 by elimination showing all of the work and the fin

pychu [463]

penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis penis

4 0

3 years ago