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Natali [406]
3 years ago
13

Seven added to double a number

Mathematics
1 answer:
valentinak56 [21]3 years ago
7 0
<h3>Correct Question :</h3>

Express in arithmetic :

Seven added to double a number.

<h3>Solution :</h3>

Let the unknown be x.

Then, double of the number = 2x.

Atq,

2x+7

Hence,seven added to double a number = 2x+7

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The scale in the drawing is 2 inches : 3 feet. What are the length and width of the actual room? *
patriot [66]

drawing isn't shown, pls take a screenshot or photograph the exercise

5 0
3 years ago
Evaluate 4x^2 y^-3 for x=3 and y=-2
Doss [256]

Answer:

36   and -1/8

Step-by-step explanation:

x^2 = 3^2 = 9 * 4 = 36

y^-3 = (-2)^-3 = -1/8

6 0
2 years ago
Read 2 more answers
Can someone please help me with these math problems ASAP?!<br> Thanks in advance! ;)
Mamont248 [21]

Answer:

11) Here given Function,

f(x) = \sqrt{2x-11}

And, g(x) = -|0.1|x+5

For f(x) = g(x)

\sqrt{2x-11}=-|0.1|x+5

2x-11=(-|0.1|x+5)^2

2x-11=0.01x^2 - 10|0.1|x+25

2x=0.01x^2 - 10|0.1|x+25+11

2x=0.01x^2 - 10|0.1|x+36

0.01x^2 - 10|0.1|x - 2x+36=0

When we solve this equation,

We found,

 x = 12.5227 ≈ 12.53

Thus, the required solution is, x = 12.53

12) Here the height of rocket A in x second,

f(x) = -16x^2+74x+9

And, The height gain by the rocket B in x seconds,

g(x) = -16x^2+82x

If at x seconds both A and B gain the same height,

That is, f(x) = g(x)

⇒ -16x^2+74x+9= -16x^2+82x

⇒74x + 9 = 82x

⇒ 82x - 74x = 9

⇒ 8x = 9

⇒ x = 1.125 ≈ 1.13

Thus, the required solution is x = 1.13 seconds (approx)


4 0
3 years ago
Please math help and please show work!
Galina-37 [17]
Since they are similar triangles, they are just enlarged versions of each other. This means that the left-most angle of triangle XYZ is also 35°.

Angles in a triangle add up to 180°, so we can find the missing angle by subtracting the two known angles from 180.

180 - 70 - 35 = 75
The right-most angle of triangle XYZ would be 75°.

Hope this helps!
6 0
3 years ago
Rolling a number less than 4 on a number cube labeled 1 through 6
olga_2 [115]
Rolling a number less than 4 means that rolling a 1, 2, or 3 will satisfy the requirement. Since 3 of 6 possible outcomes will satisfy the requirement then the likelihood that it will be rolled is 3/6 times. 3/6 reduces to 1/2 or 50% chance.
3 0
3 years ago
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