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3 years ago

Please help i don't get it

Mathematics

2 answers:

scZoUnD [109]3 years ago

7 0

It seems that you are trying to solve for X. The first steps would be to use inverse operations in order to isolate and then solve for X. You would have to distribute the 4 into x+8, giving you 4x+32-4 = 34-2x. Then simplify it a bit, giving you 4x+28=34-2x. Add 2x to both sides and subtract 28 from both sides. This gives you 6x=6. Divide by 6 on both sides and you get X=1.

Answer: X=1

DedPeter [7]3 years ago

4 0

Not sure exactly what you are supposed to be doing but, I foiled the 4(x+8) and it became 4x+32-4=34-2x. I then did 32-4 which makes it 4x+28=34-2x. Then I added 2x to both sides making 6x+28=34 and then subtracted 28 from both sides making 6x=6 then divided both sides by 6 and got x=1.

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The first four terms in a linear sequence are shown below.

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The seventh term is 37. It goes up 6 each time. 1, 7, 13, 19, 25, 31, 37

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3 years ago

Alicia took a friend for a birthday dinner. The total bill for dinner was $40.86 (including tax and a tip). If Alicia paid a 20.

solniwko [45]

Answer:

$33.85

Step-by-step explanation:

Let X be the initial bill:

(100 + 20.7)% of X was paid

120.7/100 × X = 40.86

X = 40.86 × 100/120.7

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3 years ago

Scientists modeled the intensity of the sun, I, as a function of the number of hours since 6:00 a.m., h, using the

MAVERICK [17]

The functions are illustrations of composite functions.

<em>The soil temperature at 2:00pm is 67</em>

The given parameters are:

$\mathbf{I(h) =\frac{12h - h^2}{36}}$ ---- the function for sun intensity

$\mathbf{T(I) =\sqrt{5000I}}$ -- the function for temperature

At 2:00pm, the value of h (number of hours) is:

$\mathbf{h = 2:00pm - 6:00am}$

$\mathbf{h = 8}$

Substitute 8 for h in $\mathbf{I(h) =\frac{12h - h^2}{36}}$ , to calculate the sun intensity

$\mathbf{I(8) =\frac{12 \times 8 - 8^2}{36}}$

$\mathbf{I(8) =\frac{32}{36}}$

$\mathbf{I(8) =\frac{8}{9}}$

Substitute 8/9 for I in $\mathbf{T(I) =\sqrt{5000I}}$ , to calculate the temperature of the soil

$\mathbf{T(8/9) =\sqrt{5000 \times 8/9}}$

$\mathbf{T(8/9) =\sqrt{4444.44}}$

$\mathbf{T(8/9) =66.67}$

Approximate

$\mathbf{T(8/9) =67}$

Hence, the soil temperature at 2:00pm is 67

Read more about composite functions at:

brainly.com/question/20379727

5 0

2 years ago

Chris shoots an arrow up into the air. The height (in feet) of the arrow is given by the function h(t) = - 16t2 + 64t + 112 wher

iris [78.8K]

Answer:

After 2 seconds

Step-by-step explanation:

First step is find an equation of velocity:

h(t)=-16t2+64t+112. The velocity function is derivated from position function, so we should do that.

v(t)= h´(t)= -16*2*t+64 ⇒ v(t)= -32t+64.

Now we know the arrow reach the maximun height when this velocity is equal to zero when t>0.

0=-32t+64 ⇒ 32t=64, split each member for 32 ⇒ $\frac{32t}{32}$ = $\frac{64}{32}$

t=2. That means after 2 sec. the arrow reach the maximum height

6 0

3 years ago

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weeeeeb [17]

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2 years ago