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3 years ago

If 3x=6x-15 then x+8=

Mathematics

2 answers:

Diano4ka-milaya [45]3 years ago

8 0

Broh put u brightness to max iyhrriwse u can't see your answer..☺

slega [8]3 years ago

7 0

X=5 | because:
3(5) = 6(5)-15
15 = 30 - 15
15 = 15
then:
15 + 8 = 23

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jenn made 36 candy apples for the fall bake sale. she put 3 candy apples in each bag. jenn sold the bags for $8.00 each. how muc

adelina 88 [10]

$96

36/3 = 12

12*8=96

so she would make $96

7 0

3 years ago

A family has three children.The oldest is 4 years older than the middle,and the youngest child is 2 years younger than the middl

lesantik [10]

Answer:

The age of the youngest child = x = 6 years

The age of middle child = y = 8 years

The age of the oldest child = z = 12 years

Step-by-step explanation:

Let us represent:

The age of the youngest child = x

The age of middle child = y

The age of the oldest child = z

The sum of the ages of the children is 26.

Hence: x + y + z = 26...... Equation 1

The oldest is 4 years older than the middle

z = 4 + y

The youngest child is 2 years younger than the middle child

x = y - 2

Hence, we substitute 4 + y for z and y - 2 for x in Equation 1

x + y + z = 26...... Equation 1

y - 2 + y + 4 + y = 26

y + y + y -2 +4 = 26

3y + 2 = 26

Subtract 2 from both sides

3y + 2 - 2 = 26 - 2

3y = 26 - 2

3y = 24

y = 24/3

y = 8

Solving for x

x = y - 2

x = 8 - 2

x = 6

Solving for z

z = 4 + y

z = 4 + 8

z = 12

Therefore:

The age of the youngest child = x = 6 years

The age of middle child = y = 8 years

The age of the oldest child = z = 12 years

7 0

3 years ago

I NEED HELP. What is the answer?

Lina20 [59]

Answer:

Step-by-step explanation:

Here’s what B has:

Min: 24

Q1: 27

Median: 31

Q3: 33

Max: 34

Although Choice A and B were really close with their five number summaries, out of the two of them, only B had a maximum value of 34, like the one in the box plot shown above.

7 0

2 years ago

-3x-2y=-1 4x+6y=12 what’s all the steps and answer to this equation

abruzzese [7]

Answer:

x = -9/5

y = 16/5

Step-by-step explanation:

-3x-2y=-1 first you need to multiply the numerator by 3 so when adding

4x+6y=12 the y's cancel and you get a single variable

3(-3x-2y=-1) —> -9x - 6y = -3 then you add the like terms

4x+6y=12 —> 4x + 6y = 12

(-9x+4x) + (6y - 6y) = (-3 + 12)

-5x = 9 then you divide by -5

x = -9/5

then you plug this in to either equation

4(-9/5) + 6y = 12

-36/5 + 6y = 12 then you add 36/5 to both sides

6y = 96/5 then you divide by 6

y = 16/5

6 0

3 years ago

A professor believes the students in a statistics class this term are more creative than most other students attending the unive

djverab [1.8K]

Answer:

Correct option: B

Step-by-step explanation:

The professor can perform a One-mean t-test to determine whether the average score of the students in his class is more than the average score of all the students attending university.

A t-test will be used instead of the z-test because the population standard deviation is not provided instead it is estimated by the sample standard deviation.

The hypothesis for this test can be defined as follows:

H₀: The average score of the students in his class is not more then the entire university, i.e. μ ≤ 35.

Hₐ: The average score of the students in his class is more then the entire university, i.e. μ > 35.

Given:

$\bar x=40\\SE_{\bar x}=1.63$

The test statistic is:

$t=\frac{\bar x-\mu}{SE_{\bar x}}=\frac{40-35}{1.63}=3.0674\approx3.07$

Thus, the correct option is (B).

4 0

3 years ago