All categories

3 years ago

3x + 2 = -13. Plz help

Mathematics

2 answers:

Kay [80]3 years ago

8 0

X = -5 I think hope it helps

mote1985 [20]3 years ago

3 0

The answer is -5 hope this helps

You might be interested in

The graph shows a function. Is the function linker or non linear?

zloy xaker [14]

Answer:

It is linear since it is a straight line.

8 0

3 years ago

From data gathered in the period 2008−2012, the yearly value of U.S. exports can be modeled by the function E(x) = −228x3 + 2,25

vredina [299]

Answer:

The total value the U.S. imported and exported is 19364 billion dollars

Step-by-step explanation:

* Lets explain how to solve the problem

- The yearly value of U.S. exports can be modeled by the function

E(x) = −228 x³ + 2,252.8 x² − 6,098.5 x + 11,425.8

# x is the number of years after 2008

# E(x) is the value of exports in billions of dollars

- The yearly value of U.S. imports can be modeled by the function

I(x) = −400.4 x³ + 3,954.4 x² − 11,128.8 x + 17,749.6

# x is the number of years after 2008

# I(x) is the value of imports in billions of dollars

* We need to calculate the total value the U.S. imported and

exported in 2012

∵ x is the number of years after 2008

∴ At 2012 x = 4 years

- Lets calculate the value of the exports in 2012

∴ E(x) = -228(4)³ + 2,252.8(4)² - 6,098.5(4) + 11,425.8

∴ E(x) = 8484.6 billion dollars

- Lets calculate the value of the imports in 2012

∴ I(x) = -400.4(4)³ + 3,954.4(4)² - 11,128.8(4) + 17,749.6

∴ I(x) = 10879.2 billion dollar

∵ The total value the U.S. imported and exported = E(x) + (I(x)

∴ The total value = 8484.6 + 10879.2 = 19363.8

∴ The total value = 19364 billion dollars

* The total value the U.S. imported and exported is 19364 billion dollars

7 0

3 years ago

Find two consecutive even numbers such that the difference of one-half the larger and two-fifths the smaller is equal to 38

expeople1 [14]

EXPLANATION

The consecutive even numbers are
$370 \: and \: 372$

EXPLANATION

Let
$x$
be the first even number then, the next even number will be,

$x + 2$

The difference of one-half the larger one and two-fifth the smaller one is 38 gives the equation,

$\frac{1}{2} (x + 2) - \frac{2}{5} x = 38$

We multiply through with an LCM of 10 to get,

$10 \times \frac{1}{2} (x + 2) - 10 \times \frac{2}{5} x = 38 \times 10$

This simplifies to,

$5(x + 2) - 4x = 380$

We expand the brackets to get,

$5x + 10 - 4x = 380$

We group like terms to get,

$5x - 4x = 380 - 10$

This simplifies to
$x = 370$

Therefore the next even number is is
$372$

6 0

3 years ago

A B and C are collinear, and B is between A and C. The ratio of AB to AC is 2:7. If A is at (0,-8) and B is (2,-4), what are the

labwork [276]

Answer:

C = (7, 6)

Step-by-step explanation:

The problem statement tells us the relation between the points is ...

(B-A)/(C-A) = 2/7

7(B -A) = 2(C -A) . . . . . . multiply by 7(C-A)

7B -7A +2A = 2C . . . . . add 2A

C = (7B -5A)/2 . . . . . . . divide by 2

C = (7(2, -4) -5(0, -8))/2 = (14, 12)/2 . . . . . fill in the values of A and B

C = (7, 6)

5 0

4 years ago

Some descriptive statistics for a Set of test scores are shown above for this test a certain student has a standardized score of

Serggg [28]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The score of the student is x = 779.42

Step-by-step explanation:

Generally we can mathematically represent the z-score as

$z = \frac{x - Mean}{ stDev}$

Here x is the score of the student

substituting 1045.7 for the Mean, 221.9 for the stDev and -1.2 for z we have

$-1.2 = \frac{x - 1045.7 }{ 221.9}$

=> $-266.28 = x -1045.7$

=> x = -266.28 + 1045.7

=> x = 779.42

7 0

4 years ago