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Dafna11 [192]
3 years ago
10

What is the value of x in the equation? –30 = 3x + 21

Mathematics
1 answer:
Sergio039 [100]3 years ago
4 0

Answer:

-17

Step-by-step explanation:

as the picture says I have moved 21 so that the numbers are together and it's easier to solve then you move 3 to divide it on the other side and x is left alone.

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The height of a model rocket is 4.5% of the height of the actual rocket.The model is 1.22 m high.How high is the actual rocket
Serjik [45]

Answer:

Actual Height = 27.11 m

Step-by-step explanation:

Given:

Height of model rocket = 4.5 % of actual Height

Model Height = 1.22 m

To Find:

Actual Height of rocket = ?

Solution:

We have to Find the Actual Height of the rocket

Let actual height be x

Now it is given that

Height of model rocket = 4.5 % of actual Height

As we have the values so putting it in it becomes

1.22 = 4.5 % * x

it could be written as

1.22=\frac{4.5}{100}*x

Multiplying both sides by \frac{100}{4.5}

it becomes

1.22*\frac{100}{4.5} = x

\frac{122}{4.5} = x

27.11 m =x

or

Actual Height = 27.11 m

6 0
3 years ago
Holly and Jimmy went shopping. For every $2
laila [671]
You can write the amount that they spent individually in a ratio where:

Holly : Jimmy

2 : 5

The total of this ratio would be 2+5 = $7.


To find the scale factor multiplier for the base ratio of 2:5:

35/7 = 5


Multiply both sides of the ratio by 5.

Holly : Jimmy

2 x5 : 5 x5

10 : 25

You can see that the total of this ratio is now $35, where Jimmy spent $25.
5 0
2 years ago
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What is the slope of the line?
Nat2105 [25]
The slope of the line is gonna be 1/3
5 0
3 years ago
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If a total of 360 students were involved in the evening's activities, how many students attend the school?
Papessa [141]
390

360 = 12x/13
30 = x/13
390 = x
4 0
3 years ago
A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5
Semmy [17]

3x + 3y = 72

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y = 14

x = 24 - 14 = 10

The test contains 10 three-point questions and 14 five-point questions

please mark me brainliest!

8 0
3 years ago
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