Mathematics High School

help with #7 please :) i’ll mark you brainily

Answers

Answer 1

Answer:

x = 11

Step-by-step explanation:

The student didn't divide two on both sides in the step 1. This the mistake that the student made.

The correct solution

2√( 3x + 3 ) = 12

Divide 2 on both sides,

2√( 3x + 3 ) / 2 = 12 / 2

√( 3x + 3 ) = 6

Square on both sides,

[ √( 3x + 3 ) ]² = 6²

3x + 3 = 36

3x = 36 - 3

3x = 33

x = 33 / 3

x = 11

Answer 2

Answer:

x=11

Step-by-step explanation:

✌️❤️✌️

............

Related Questions

Find the first three terms of:
84-4n

Answers

Answer:

hope you like it

Step-by-step explanation:

brainliest me

help plz 25 pts due i five mins

Answers

Answer:

B) <

Step-by-step explanation:

Since both numbers are being multiplied by 10^-5, we can completely cut that part out of the inequality and instead just compare the values 3.2 and 4.6. It is obvious when looking at the problem that 3.2 is smaller than 4.6, so we will use the less than symbol <.

Hopefully that's helpful! Good luck on your quiz. :)

Four boys weighed themselves in different pairs and alone. The weights of the pairs were 110 kg, 112 kg, 113 kg, 118 kg, 121 kg, and the weight of one pair was lost. The total weight of the four boys was 230 kg. What was the lost weight?

Answers

The lost pair of weight can be found by subtracting the a known pair from

the total weight leaving the value of the lost pair.

The lost weight of a pair of boys is 120 kg

Reasons:

Let a, b, c, and d represent the weights of the four boys, we have;

The number of ways of selecting pairs (two boys) of boys from a group of

four is given using combination formula as follows;

[tex]_nC_r = \dfrac{n!}{r! \cdot (n - r)!}[/tex]

Which gives;

[tex]_4C_2 = \dfrac{4!}{2! \cdot (4 - 2)!} = 6[/tex]

₄C₂ = 6

Therefore, the weights of the pairs are;

a + b = 110

a + c = 112

a + d = 113

b + c = 118

b + d = 121

c + d = Lost weight

a + b + c + d = 230 (given)

Therefore;

The lost weight, c + d = 230 - (a + b)

Which gives;

c + d = 230 - (110) = 120

The lost weight = c + d = 120

The lost weight = 120 kg

Learn more here:

https://brainly.com/question/12974932

Answer:

116

Step-by-step explanation:

you can use variables

a+b=110

a+c=112

a+d=113

b+c=118

b+d=121

add up the weights and you get 574 kg (you need to find c+d)

3a+3b+2c+2d=574

a+b+c+d = 230 as given then you multiply by 3 so you can cancel out 3a and 3b and subtract 690-574 because we multiplied by 3

you are left with c+d=116

Answers

Answer:

We’re are the choices

Step-by-step explanation:

Selina had been renting for 18 months when there was a flood. The total cost to replace her damaged belongings was $2,160. 0. Then 20.833 percent would Selina have saved if she had a renters' insurance policy at a monthly cost of $25. 00

What is Percentage?

percentage, a relative value indicating hundredth parts of any quantity.

Given that

Selina had been renting for 18 months when there was a flood.

The total cost to replace her damaged belongings was $2,160. 0.

if she had a renters' insurance policy at a monthly cost of $25. 00

Then for 18 months it would be

18×25

$450

Now let us remove the amount which got in insurance from total rent.

$2,160. 0-$450

=1710

Now we have to find 450 is what percentage of 2160.

450/2160×100

0.2083×100

20.833

Hence 20.833 percent would Selina have saved if she had a renters' insurance policy at a monthly cost of $25. 00

To learn more on Percentage click:

https://brainly.com/question/28269290

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If the nth term of a number sequence is 5n – 2n, find the first 3 terms and the 10th term.

Answers

Answer:

0,3,6, and 30

Step-by-step explanation:

2. The cost of one chair is $349.50. Find the cost of 5 chairs?
a) $1745
b) $1700.50
c) $1747.50 qooq
d) $1645.50
Answer:

Answers

a) $1745

Step-by-step explanation:

349.5 x 5 = 1747.5

Answer:

C.) $1747.50

Step-by-step explanation:

Multiply.

349.50 × 5 = 1747.50

cost per chair = 349.50

number of chairs = 5

What is the following sum?

Answers

I think it’s the first one hope this helps

can anyone please help me with this I am stuck on this

Answers

Answer: 7.2

Step-by-step explanation: u times 0.9 by 15, then separately u times 2.1 by 3. then u take both numbers and subtract.

Answer:

Step-by-step explanation:

0.9d - 2.1f = 0.9*15 - 2.1*3

= 13.5 - 6.3

= 7.2

helpppppppppppppppppppppppppppppppppppppppppppp

Answers

Answer:

There are 16 squares and 12/16 is 75 percent so 75% - green

25% - white hope this helps :)

Step-by-step explanation:

Please help with these questions

Answers

Answer:

A. 8 to 2

b. 2 to 4

c. 6 and 4 or 3 and 5

d. 3and 6

e. 1 and 8

Step-by-step explanation:

solve for x, 500 = 50*(1.23)^x

this is for an exponential functions task where 500 represents an animal population, 1.23 is the growth rate and 50 in the initial population.

x represents the periods in years

Answers

Answer:

Step-by-step explanation:

[tex]x^n=p\\x=\frac{\log(p)}{\log(n)}[/tex]

[tex]500=50*1.23^x\\10=1.23^x\\\frac{\log(10)}{\log(1.23)}= 11.12283811[/tex]

help me pls with math

Answers

Answer:

Step-by-step explanation:

{4z=8}
{3x-2z=11}
{x-4y+z=11}

Answers

Step-by-step explanation:

4z = 8

z = 8/4

z = 2

3x - 2z = 11

3x - 2.2 = 11

3x - 4 = 11

3x = 11 + 4

3x = 15

x = 15/3

x = 5

x - 4y + z = 11

5 - 4y + 2 = 11

-4y = 11 - 5 - 2

-4y = 4

y = 4/-4

y = -1

Solution → {x,y,z} = {5,-1,2}

Can someone help me find the angles of R, S, and U? ive already solved the other ones

Answers

Assuming the angle congruent to r is not a right angle, we can solve for a supplementary one.

70 + x + x=180

70 + 110=180

110 can be broken down into 55, which we can use for the other two sides.

I’m gonna assume angle R is 55°.

For angle S, same thing. 62 + x=180

The value for it is 118, half it and you get 59°.

Last but not least, angle u. Angle u is diff bc it’s complimentary. We know that one side equals 59°, so subtract 59 from 90, and the value of angle U is 31°.

Hope this helps! It’s been a while since I was in geometry so I hope I’m right too aha

7p-4p+p
Simplify the equation

Answers

Answer:

7p -4p+p

8p-4p= 4p

hope it helps

if i roll a dice 120 times how many times am I gonna get 4

Answers

Answer:

20 out of 120 times

Step-by-step explanation:

As others have said, the general formula is:

expected successes = probability*number of trials

Perhaps an easier question: If you roll a die 6 times, how many 4s would you expect to get?

1, right? 1 out of every 6. That’s what 1/6 means.

If you roll a die 12 times, you expect 2. 2/12 = 1/6

__% of 15 is 6 hellp mee

Answers

Answer:

40%

Step-by-step explanation:

6 divided by 15 times 100 = 40

Answer:

(40%)

Step-by-step explanation:

6 / 15 = 0.4

0.4 * 100 = 40%

We can check this by doing 40% times 15;

15 * 0.4 = 6 ✓

It checks :D

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Mark bought 12 cookies at $2.70. At that rate how much would it cost him to buy 60 cookies?

Answers

Answer: if Mark were to buy 20 cookies, it'll cost him around $4.40

Step-by-step explanation: hope this helps :)

If Mark is buying 12 cookies for $2.70. It’s asking what would it cost him to buy 60 cookies. Take 60÷12 is 5. 5×$2.70 is $13.50. It would cost Mark $13.50 for 60 cookies

Pleaseee help max points is the reward I really need help with this question and it says find leg 1 leg 2 and the distance please help

Answers

answer done last mai btaa dena correct hai

10% out of 100 in simplest form

Answers

Answer:

10

Step-by-step explanation:

100 ÷ 10 = 10

Right in equation for the line with a slope of -2 and a y-intercept of 1

Answers

Answer:

Step-by-step explanation:

Use the slope intercept formula.

y = mx + b

m = slope

b = y intercept

y = -2x + 1

If x = −3, which number line shows the value of |x|? (5 points)

Question 11 options:

1)

2)

3)

4)

Answers

can’t see your answer choices but the absolute value of -3 is 3 so I would say 3 is your answer

Which inequality describes the points shown on this number line?

Answers

Answer:

Step-by-step explanation:

the answer is 4 <x or x is equal to smaller than q0

Determine whether the ordered pair (6, 5) is a solution to the equation –2x +y = –7.

Yes, (6, 5) is a solution.

No, (6, 5) is not a solution.

Answers

Answer:

Yes, (6, 5) is a solution.

Step-by-step explanation:

We can answer this by using the ordered pair point (6,5) in the equation to see if it works:

–2x +y = –7

–2(6) +(5) = –7 ????

-12 + 5 = -7 ???

-7 = -7 YES

can yall help me out

Answers

Answer:

0.8

Step-by-step explanation:

Answer:

-4/5

Step-by-step explanation:

[tex]\frac{1}{10}+-\frac{9}{10}=-\frac{8}{10}=-\frac{4}{5}[/tex]

The length of a rectangle is 5 ft longer than its width.
If the perimeter of the rectangle is 70 ft, find its length and width.

Answers

Answer:

Length 20

Width 15

Step-by-step explanation:

What is the range of the graphed function?
O [x1-2 O [yI-2 O {x | x is a real number}
O [vl y is a real number}

Answers

Answer:

first one my sister tried it

Step-by-step explanation:

Can someone help me with this I’m not getting it

Answers

Answer:

n = 3.5

Step-by-step explanation:

basically it's saying that 2.8 is proportional to 4.8 as n is proportional to 6. therefore:

2.8/4.8 = n/6

0.583 = n/6

3.5 = n

Help help help help help help

Answers

We can find out if the angles are the same by adding them

180 = 6x + 4x + 10 + 10x + 70

180 = 20x + 80

100 = 20x

x = 5

6x = 30

4x + 10 = 30

10x + 70 = 120

From this information, we can conclude that this is an obtuse triangle (iv.) and that this is and isosceles (ii.).

The answer is ii. and iv. which is B

Whats this, smallest to largest?
0.1

0.11

0.01

0.101

Answers

Answer:

0.01, 0.1, 0.101, 0.11

Step-by-step explanation:

0.01, 0.1,0.101,0.11

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