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3 years ago

Evaluate Dx. -4x + 7y = 1 25 = 2x +5 y Dx = ?

Mathematics

1 answer:

inna [77]3 years ago

5 0

Answer: 7

−4 ∗ x + 7∗ y = 125 = 2 ∗ x + 5y = 7

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66 feet of crown molding was installed around a rectangular dining room. If the length of the room is 16.75 ft, what is the widt

Citrus2011 [14]

Answer:

The width of the room is 17.25 feet

Step-by-step explanation:

2(15.75+W)=66

Divide both sides by 2: 15.75+W=33

Subtract 15.75 from both sides: W=33-15.75=17.25

Hope this helps!

3 0

4 years ago

Plz help me well mark brainliest if correct!!...

malfutka [58]

Answer:

Step-by-step explanation:

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3 years ago

If m+2/5 = 1/2, then which of the following is true?

Andreas93 [3]

Answer

sixty nine

Step-by-step explanation:

four twenty

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3 years ago

A model rocket is launched directly upward at a speed of 20 meters per second from the ground. The function f(t)=−4.9t2+20t, mod

Nataly [62]

Answer:

The rocket will reach its highest point about 2.04 seconds.

Step-by-step explanation:

The function:

$f(t)=-4.9t^2+20t$

Models the relationship between the height of the rocket and the time after launch t in seconds.

Since this is a quadratic function, the rocket will reach its highest point at its vertex. The vertex of a quadratic is given by:

$\displaystyle \Big(-\frac{b}{2a}, f\Big(-\frac{b}{2a}\Big)\Big)$

In this case, a = -4.9, b = 20, and c = 0. Thus:

$\displaystyle t=\frac{-(20)}{2(-4.9)}=\frac{10}{4.9}\approx 2.04$

The rocket reaches its maximum height after 10/4.9 or about 2.04 seconds.

Further Notes:

Then the maximum height of the rocket will be f(10/4.9):

$\displaystyle f\Big(\frac{10}{4.9}\Big)=-4.9\Big(\frac{10}{4.9}\Big)^2+20\Big(\frac{10}{4.9}\Big)\approx20.41\text{ feet}$

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3 years ago

Which is greater 3/8 0r 0.385?

vlada-n [284]

3/8 beacuse you would change that to a mix number

7 0

3 years ago