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4 years ago

3x+5+4x+6simplify this

Mathematics

2 answers:

algol [13]4 years ago

8 0

So start off by combine like term
3x+4x+5+6
=7x+11
Hope this helps you!

zloy xaker [14]4 years ago

7 0

Just simply collect like terms.

3x+4x+5+6
7x+11

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What is the result when 78 is increased by 9.5%?

Hitman42 [59]

The best thing to do is to divide 78 by 100, and then multiply this by 9.5 78/100= 0.78. 0.78x9.5=7.41 You've then got to add 7.41 to 78, and this gives you 85.41 Hope this helps :)

4 0

4 years ago

A new anxiety medication has been manufactured and a study is being conducted to determine whether its effectiveness depends on

Irina18 [472]

The test statistics is used to determine if the anxiety medication can happen under a null hypothesis

The test statistics that is an appropriate hypothesis test is $z =\frac{0.35 - 0.40}{\sqrt{\frac{0.35(1 - 0.35)}{60} + \frac{0.40(1 - 0.40)}{85}}}$

<h3>How to determine the test statistic</h3>

<u>40 milligrams of medication</u>

Patients = 60

Lower stress level patients = 21

The mean of this medication is:

$\bar x = \frac{x}{n}$

So, we have:

$\bar x_1 = \frac{21}{60}$

$\bar x_1 = 0.35$

<u>75 milligrams of medication</u>

Patients = 85

Lower stress level patients = 34

The mean of this medication is:

$\bar x = \frac{x}{n}$

So, we have:

$\bar x_2 = \frac{34}{85}$

$\bar x_2 =0.4$

The test statistic is then calculated as:

$z =\frac{\bar x_1 - \bar x_2}{\sqrt{\frac{\bar x_1(1 - \bar x_1)}{n_1} + \frac{\bar x_2(1 - \bar x_2)}{n_2}}}$

The equation becomes

$z =\frac{0.35 - 0.40}{\sqrt{\frac{0.35(1 - 0.35)}{60} + \frac{0.40(1 - 0.40)}{85}}}$

Hence, the test statistics that is an appropriate hypothesis test is $z =\frac{0.35 - 0.40}{\sqrt{\frac{0.35(1 - 0.35)}{60} + \frac{0.40(1 - 0.40)}{85}}}$

Read more about test statistic at:

brainly.com/question/15980493

7 0

2 years ago

If the cube has a volume of approximately 561.5 cm, what is the approximate area of the cross-section shown?

never [62]

Answer:

The area of the cross section of the cube is 68 cm

Step-by-step explanation:

Volume of the cube is $a^{3}$

$a^{3}$ $=$ 561·5 cm $($ Given $)$

a $=$ edge or side of the cube

so, cube root on both the side will be

a $=$ 8·25 cm

Cross section area of the cube is it depends where you cut the cube if cut the cube parallel and perpendicular to the faces then the cross sectional area will be a square whose length is the same as the length of the cube

Cross section area of the cube $=$ $a^{2}$

$=$ $(8.25)^{2}$ cm

$=$ 68 cm

Therefore , the area of the cross section of the cube is 68 cm

5 0

4 years ago

Since the triangle below contains an obtuse angle what type of angle must angle x be

Mamont248 [21]

Answer:

Option B) Acute

Step-by-step explanation:

we know that

if a triangle contains an obtuse angle, then the other two angles must be acute.

<em><u>Verify</u></em>

The sum of the interior angles of a triangle must be equal to 180 degrees

in the triangle of the figure

113°+15°+x°=180°

Solve for x

118°+x°=180°

x=180°-118°=62°

62° < 90°

therefore

The angle x is an acute angle

4 0

3 years ago

PLEASE HELP!!!! WHAT IS THE CIRCUMFERENCE???

erma4kov [3.2K]

Answer:

6.28 ft

Step-by-step explanation:

The circumference of a circle is given by

C = pi *d where d is the diameter

C = 3.14 * 2

C = 6.28 ft

8 0

3 years ago

Read 2 more answers