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Vadim26 [7]
3 years ago
10

If x+y=4 what is x+y-6

Mathematics
1 answer:
Natalka [10]3 years ago
8 0

Answer:

-2. Not really sure on this one because there is only one equation, so I think it is impossible.

Step-by-step explanation:

x=4-y

x+y-6

4-6=-2

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Tommy’s grandma gave him $20 and he makes 10 each week cutting grass. What is the algebraic expression for this phrase?
FrozenT [24]

Answer:

20 x 10

Step-by-step explanation:

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Use the drawing tools to form the correct answer on the number line.
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In the picture

Step-by-step explanation:

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A jet can travel at a speed of 500 miles per hour. How far will the plane get it it flies at a full speed for 4.5 hours.
SpyIntel [72]

Answer:2250 miles

Step-by-step explanation:

If the jet travels 500 miles in an hour then in 4 hours it will travel 2000 miles. In half an hour it will travel 250 miles.

2000+250=2250 miles

4 0
3 years ago
2. Ariana has created a paper airplane for her physics class at school where all the students will be testing their planes by se
sergiy2304 [10]

Answer:

2. The airplane will crash into the ground after 5 seconds.

3. The domain of the function is [0,30] and range of the function is [-\infty,900].

Step-by-step explanation:

2.

Ariana initial attempt is modeled by the function,

h(x)=x^2-12x+35

where, h is the height in feet and x is the time in seconds of the paper airplanes path.

If airplane crash into the ground, then h(x)=0,

0=x^2-12x+35

0=x^2-7x-5x+35

0=x(x-7)-5(x-7)

0=(x-7)(x-5)

Equate each factor equal to 0.

x=5,7

Therefore the airplane will crash into the ground after 5 seconds.

3.

The height of the rocket in meters is modeled by the function shown below, where t is time in seconds.


h(t)=-4t^2+120t

The value of t must be positive because time can not be negative.

Find the zeros of the function.

0=-4t(t-30)

t=0,30

The leading coefficient is negative, so the it is a downward parabola. Since the zeros of the function are 0 and 30, therefore the function is negative before 0 and after 30.

The height can not be negative, so the domain of the function is

0\leq t\leq 30

The vertex of a downward parabola is the maximum point.

Vertex of a parabola,

(\frac{-b}{2a},h(\frac{-b}{2a}))

(\frac{-120}{2(-4)},h(\frac{-120}{2(-4)}))

(15,h(15))

Put t=15 it in the equation.

h(15)=-4(15)^2+120(15)=900

(15,900)

The range of the function is

[-\infty,900]

Therefore the domain of the function is [0,30] and range of the function is [-\infty,900].

8 0
3 years ago
What is the answer :(
Fittoniya [83]

Answer:

70 inches

Step-by-step explanation:

10 in x 7 in =70 inches

MARK ME BRAINLIEST!!!!!!!!!!

5 0
2 years ago
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