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3 years ago

Hey brainly users! What is the answer to this problem? 3x(4y + 7) - 5 = ?

Mathematics

2 answers:

NARA [144]3 years ago

6 0

Answer:

12xy + 21x - 5

ratelena [41]3 years ago

5 0

Answer:

12xy+21x−5

SOLUTION STEPS

3x(4y+7) −5

Use the distributive property to multiply 3x by 4y+7.

12xy+21x-5

Step-by-step explanation:

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Verify x+(y+z) =(x+y) +z, when x=-4/15, y=-4/5and z =17/8

katrin [286]

Answer:

The equality is true

Step-by-step explanation:

x+(y+z)=(x+y)+z

x+(y+z)=(x+y)+zwhen we plug in -4/15 for x,-4/5 for y

x+(y+z)=(x+y)+zwhen we plug in -4/15 for x,-4/5 for yand 17/8 for z,we get

x+(y+z)=(x+y)+zwhen we plug in -4/15 for x,-4/5 for yand 17/8 for z,we get-4/15+(-4/5+17/8)=(-4/15+-4/5)+17/8

x+(y+z)=(x+y)+zwhen we plug in -4/15 for x,-4/5 for yand 17/8 for z,we get-4/15+(-4/5+17/8)=(-4/15+-4/5)+17/817/24=17/24

x+(y+z)=(x+y)+zwhen we plug in -4/15 for x,-4/5 for yand 17/8 for z,we get-4/15+(-4/5+17/8)=(-4/15+-4/5)+17/817/24=17/24so this equality is true

4 0

3 years ago

Is -10-2x equal to 2x-10

saul85 [17]

Answer:No

Step-by-step explanation:

-10-2x = -2(5+x)

2x-10 = 2(x-5)

8 0

3 years ago

In his free time, Gary spends 11 hours per week on the Internet and 8 hours per week playing video games. If Gary has five hours

stellarik [79]

Answer:

Around 54% is what I would say.

Step-by-step explanation:

7 0

3 years ago

One angle is four times as large as a second angle of the angles are supplementary find the number of degrees in the smaller ang

seropon [69]

let x=smaller angle

larger angle=4x

x+4x=180

5x=180

x=180/5

x=36

smaller angle=36º

6 0

3 years ago

Suppose you obtained a Spearman rs of 0.53 from a sample of 13 pairs of scores. For a two-tailed test, such a correlation coeffi

Anastasy [175]

Answer:

C: p < 0.01

Step-by-step explanation:

We are given;

Spearman rank Correlation Coefficient: rs = 0.53

sample size: n = 13 pairs

Now, from the table attached, tracing n = 13 and locating a corresponding value of rs = 0.53 which falls in between 0.484 and 0.56. Thus, we can see that p is greater than the nominal significance value of 0.05 but less than 0.01.

Thus, correct answer is p < 0.01

3 0

4 years ago