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2 years ago

Hi please help me!! thanks

Mathematics

1 answer:

Artist 52 [7]2 years ago

4 0

Answer:

3.2 x 10^13

Step-by-step explanation:

(8x10^4)(4x10^8)

reorder the terms using the commutative property

(8x4)x(10^4x10^8)

multiply

32x (10^4 x 10^8)

= 32 x 10^4+8

= 32 x 10^12

now convert to scientific notation

=3.2 x 10^13

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Y = 2x + 6. If x = 5, how much is y?

ELEN [110]

Answer:

Step-by-step explanation:

Y=2(5)+6

y=10+6

Y=16

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2 years ago

Jason places a mirror on the ground 40 feet from the base of a tree. He walks backwards until he can see the top of the tree in

Bas_tet [7]

Let
x---------------> the height of the tree

we know that
by using proportion
 $\frac{40}{8} = \frac{x}{6} \\ \\ 40*6=8*x \\ \\ x=40*6/8 \\ \\ x=30 feet$

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the answer is
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3 years ago

Read 2 more answers

What is a / b (2x - 12) = c / d ; x ?

Alex17521 [72]

we are given

$\frac{a}{b} (2x-12)=\frac{c}{d}$

we can solve for x

We can isolate x

step-1: Multiply both sides by b/a

$\frac{b}{a}*\frac{a}{b} (2x-12)=\frac{b}{a}*\frac{c}{d}$

$(2x-12)=\frac{bc}{ad}$

step-2:Add 12 both sides

$(2x-12)+12=\frac{bc}{ad}+12$

$2x=\frac{bc}{ad}+12$

step-3: combine right side

$2x=\frac{bc+12ad}{ad}$

step-4:Divide both sides by 2

$x=\frac{bc+12ad}{2ad}$ ..............Answer

3 0

3 years ago

The high school leadership team is having a car wash. They charge $5.50 for large cars and $4.00 for small cars . They had a suc

11Alexandr11 [23.1K]

Answer: 56 large cars and 86 small cars.

Step-by-step explanation:

Let's call:

$l$ : the number of large cars.

$s$ : the number of small cars.

Then, you can set up the following system of equations:

$\left \{ {{l+s=142} \atop {5.50l+4.0s=652.50}} \right.$

You can use the Elimination Method:

- Multiply the first equation by -4.0

- Add both equations.

- Solve for l.

$\left \{ {{-4.0l-4.0s=-568} \atop {5.50l+4.0s=652.50}} \right.\\--------\\1.5l=84.5$

$l$ ≈ $56$

Substitute $l=56$ into one of the original equations and solve for s:

$56+s=142\\s=142-56\\s=86$

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2 years ago

Not rlly a paper I gotta do buuuut, say I have seven one hundreds, one ninety nine, and two zeros... what would my grade be in t

vlabodo [156]

If they’re all weighted equally, then your average grade will be 79.9%

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3 years ago