All categories

3 years ago

What is the answer to this equation? 2(9+x) = -5(4-x)

Mathematics

1 answer:

photoshop1234 [79]3 years ago

8 0

Answer:

Hi!

Alrighty here we go:

2(9+x)=-5(4-x)

18+2x=-20+5x

Now combine like terms

+20+18+2x=-20+20+5x

38+2x=5x

38+2x-2x=5x-2x

38=3x

x= 38/3

Hope this helped!

You might be interested in

F(x)=x^2. What is g(x)

Basile [38]

I don’t know I just need points

6 0

3 years ago

A polygon has an interior angle sum of 9000. How many sides does it have

SSSSS [86.1K]

Answer:

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

Here the sum = 9000°, thus

180° (n - 2) = 9000° ( divide both sides by 180° )

n - 2 = 50 ( add 2 to both sides )

n = 52

7 0

3 years ago

Use a scientific calculator or unit circle to convert the polar form of the complex number to its equivalent rectangular form.

GuDViN [60]

I assume 3.14 is meant to represent π. So x=32cos(π/3)=16 and y=32sin(π/3)=16√3=27.7128 approx.
If we take 3.14 directly (radians), then we get x=16.0147 and y=27.7043 approx.

5 0

3 years ago

Read 2 more answers

Tony is reseeding the front lawn. The lawn covers 2,500 square feet and grass seed is $15.98 for each 7-pound bag. Each pound of

AveGali [126]

Answer:17 bags that cost 271.66$

Step-by-step explanation:

2500 / 150 = 16.6666

You cant buy 2/3 of a bag so you have to buy 17 bags.

17 x 15.98 = 271.66$

4 0

3 years ago

The heights (measured in inches) of men aged 20 to 29 follow approximately the normal distribution with mean 69.3 and standard d

Zolol [24]

Answer:

The middle 92% of all heights fall between 64.4 inches and 74.2 inches.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 69.3, \sigma = 2.8$

Between what two values does that middle 92% of all heights fall?

The middle 92% falls from X when Z has a pvalue of 0.5 - 0.92/2 = 0.04 to X when Z has a pvalue of 0.5 + 0.92/2 = 0.96. So from the 4th percentile to the 96th percentile.

4th percentile

X when $Z = -1.75$