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Arlecino [84]
3 years ago
12

Soit trois nombres consécutifs. Lorsque l’on soustrait le double du deuxième nombre du quadruple du

Mathematics
1 answer:
irina [24]3 years ago
4 0

Answer:

Les trois nombres sont 5, 6 et 7.

Step-by-step explanation:

Soit x le premier nombre.

x + 1 sera le second et x + 2 sera le troisième.

On pose l'équation :

2x + 3(x + 1) = 4(x + 2)

2x + 3x + 3 = 4x + 8

5x - 4x = 8 - 3

x = 5

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97. An elevator in a tall building goes up 7 floors, then
Komok [63]

so, start floor = x

x + 7 - 9 - 4 + 8 - 2 = 14

x = 14

the elevator started on the 14th floor.

to verify: 14 + 7 = 21 - 9 = 12 - 4 = 8 + 8 = 16 - 2 = 14

5 0
3 years ago
A $10,000 deposit at the bank will double in value in 9 years. Give a formula for the accumulated amount t years after the inves
wolverine [178]

Answer:

S = P(1.08)^{t}

Step-by-step explanation:

A $10,000 deposit at the bank will double in value in 9 years.

If the interest is r% and it is compounded each year, then we can write from the formula of compound interest that

20000 = 10000(1 + \frac{r}{100})^{9}

⇒ 2 = (1 + \frac{r}{100})^{9}

⇒ 1 + \frac{r}{100} = 1.08

⇒ r = 8%

Therefore, the formula for the accumulated amount t years after the investment is made will be  

S = P(1 + \frac{8}{100})^{t} = P(1.08)^{t}  

where, P is the invested principal and S is the accumulated sum. (Answer)

3 0
3 years ago
To Enter the value of n that makes the equation: 4^5.4^n=4^8 true
irina1246 [14]
4^2\text{ }\times4^n=4^8

Since both sides have the same base (4), we can add the exponents

4^{5+n}=4^85+n=8

subtract 5 from both sides:

5+n-5=8-5n=3

6 0
1 year ago
8. What is the value of x?
xeze [42]

Answer:

I believe that x is equal to 10

Step-by-step explanation:

3 0
2 years ago
In B E C, F is the centroid, and AC = 12. Find A F and F C
klemol [59]

bearing in mind that the centroid in a triangle cuts each of the three medians in a 2:1 ratio.

since we know that A C = 12, let's split it in a 2:1 ratio then, cleary from the picture the larger is F C, so F C : A F is on a 2:1 ratio.

\bf A C=A F+F C\qquad \qquad \cfrac{F C}{A F}=\cfrac{2}{1}\qquad \qquad \cfrac{2\cdot \frac{12}{2+1}}{1\cdot \frac{12}{2+1}}\implies \cfrac{2\cdot 4}{1\cdot 4}\implies \cfrac{8}{4}

4 0
3 years ago
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