3 years ago

The sum of 15 and two times a number is29.what is the number?

Mathematics

2 answers:

Hitman42 [59]3 years ago

8 0

Answer:7

Step-by-step explanation:

matrenka [14]3 years ago

4 0

Answer:

Step-by-step explanation:

7x2=14

15+14=29

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Evaluate \dfrac{e}{4}+2f-3 4 e +2f−3 when e=12e=12 and f=\dfrac12f= 2 1 .

Verdich [7]

Answer: -406

Step-by-step explanation:

We have the following expression:

$\frac{e}{4}+2f-34e+2f-3$

In addition we know:

$e=12$ and $f=\frac{1}{2}$

If we substitute this in the expresion, we will have:

$\frac{12}{4}+2(\frac{1}{2})-34(12)+2(\frac{1}{2})-3=-406$

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3 years ago

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at a country concert,the ratio of number of the Boys to the number of girls is 2:7 if there are 250 more girls than boys how man

sergey [27]

Answer:

100

Step-by-step explanation:

Ratio is a fraction, so ratio of boys to girls would be written as [let boys be "b" and girls be "g"]:

$\frac{b}{g}=\frac{2}{7}$

Also, there are 250 more girls than boys, so we can write:

g = 250 + b

Lets substitute this into "g" of the ratio we wrote and cross mulitply and solve for b:

$\frac{b}{g}=\frac{2}{7}\\\frac{b}{250+b}=\frac{2}{7}\\7b=2(250+b)\\7b=500+2b\\5b=500\\b=\frac{500}{5}=100$

The number of boys = 100

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3 years ago

Find the area of AAOB 9√3 un² 3√3 un² 4.5√3 un

butalik [34]

Answer:

Step-by-step explanation:

The area of the equilateral triangle is $\frac{\sqrt{3}}{4}(6)^{2}=\boxed{9\sqrt{3}}$

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2 years ago

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salantis [7]

167 is the volume of the prism

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Lady bird [3.3K]

Answer:

Step-by-step explanation:

Because a^2+b^2=c^2 in a right triangle by Pythagorean's Theorem. So, the only one that works is 3^2+4^2=5^2 because 9+16=25.

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3 years ago

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