1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Karolina [17]
4 years ago
12

How old is david if his age 6 years from now will be twice his age 7 years ago?

Mathematics
2 answers:
Kaylis [27]4 years ago
8 0
Let's say David's age right now is x years
x + 6 = 2(x - 7)
x + 6 = 2x - 14
x = 20
Therefor David is 20 years old
Gnesinka [82]4 years ago
6 0
X-6=2x-14
x=20
Dave is 20 years old 
hope this helped 
You might be interested in
Plzz help steps if possible if not its ok j=i just need to pass this class
hammer [34]

Answer:

\text{(B) }\cos 40^{\circ}=\frac{x}{60}

Step-by-step explanation:

In any triangle, the cosine/cos of an angle is equal to its adjacent side divided by the hypotenuse (longest side) of the triangle. (a/h)

The angle marked 40 degrees has an adjacent side of x and the hypotenuse of the triangle is 60.

Therefore, we have the equation:

\boxed{\cos 40^{\circ}=\frac{x}{60}}

6 0
3 years ago
Triangle ABC is similar to triangle DEF. Find the value of side length DE. Side length DE is cm.
Art [367]

Answer:

??? I can't see the picture

Step-by-step explanation:

5 0
3 years ago
Sur une photographie réalisée avec un
shtirl [24]

Answer:

0.3cm ?

Step-by-step explanation:

3 0
3 years ago
A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean
djyliett [7]

Answer:

The probability is 0.0069

Step-by-step explanation:

First thing to do here is to calculate the z-score

Mathematically;

z-score = (x-mean)/SD/√(n)

where x = 9.1 , mean = 8.4 , SD = 1.8 and n = 40

Plugging these values into the z-score equation, we have;

z-score = (9.1-8.4)/1.8/√(40) = 0.7/1.8/6.325 = 0.0615

Now, we check the standard normal table for P(z > 2.46) = 0.0069

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=4%20%20%5Ccos%2860%20%2B%20%20%5Calpha%20%29%20%20%5Csin%2830%20%2B%20%20%5Calpha%20%29%20%20%
Yuri [45]

Answer:

i am very bad at o math i am only at 8 sorry

Step-by-step explanation:

if you could give me a brainliest.

5 0
3 years ago
Other questions:
  • What is 0.35 as a mixed number or fraction is simplist form
    15·1 answer
  • At 2.80 per pound,the cheddar cheese costs how many cents per pound ounce
    5·1 answer
  • What is the formula to find out percent of discounts?<br>$7.00 IS WHAT PERCENT DISCOUNT OF $25.00?
    5·1 answer
  • What is the sum <br> 8+{-12}
    9·2 answers
  • What is the Value of x?
    10·2 answers
  • (x) 3 5 7 <br> (y) 7 11 15 <br><br> Find x, when y = 21
    12·1 answer
  • Simplify the equation <br> -7(-2p+5)=
    9·1 answer
  • For the quadratic, y = -2(x - 1)(x + 4), the x-intercepts are
    12·1 answer
  • Plss join really bored <br><br> ID 852 183 4117 <br> code WKJV5p
    7·1 answer
  • PLEASE HELP WELL GIVE BRAINLIEST TO FIRST ANSWER
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!