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3 years ago

1. 4(x + 8) -4 = 34 - 2x

Mathematics

1 answer:

Natasha_Volkova [10]3 years ago

7 0

Answer:

4(x + 8) -4 = 34 - 2x

4x + 32 - 4 = 34 - 2x

4x + 2x = 34 - 32 + 4

6x = 6

x = 6/6

x = 1

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The Sahara Desert has an area of approximately 9,400,400 km2. While estimates of its average depth vary, they center around 150

dolphi86 [110]

Answer:

$1.128048 \times 10^{25}$ grains of sand are in the Sahara Desert

Step-by-step explanation:

Given :

The Sahara Desert has an area of approximately 9,400,400 sq.km.

Depth = 150 m

To Find :Approximately how many grains of sand are in the Sahara Desert?

Solution:

Area of Sahara desert = 9,400,400 sq.km.

$1 km^2 = 1000000 m^2$

So, $9,400,400 km^2 = 1000000 \times 9400400 m^2$

$9,400,400 km^2 =9.4004 \times 10^{12}m^2$

Volume of sand = $Area \times depth$

= $1.41006\times 10^{15} m^3$

$1 m ^3 = 1000000 cm^3$

So, $1.41006\times 10^{15} m^3 = 1.41006\times 10^{15} \times 1000000cm^3$

$1.41006\times 10^{15} m^3 =1.41006 \times 10^{21}cm^3$

1 cubic cm holds grains of sand = 8000

$1.41006 \times 10^{21}cm^3$ holds grains of sand = $1.41006 \times 10^{21} \times 8000$

= $1.128048 \times 10^{25}$

Hence $1.128048 \times 10^{25}$ grains of sand are in the Sahara Desert

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3 years ago

A 6th grade class did a weekend fitness challenge. Each student set a goal of `75` minutes of fitness. Luca exercised for `54` m

forsale [732]

Answer:

The answer is 72%

Step-by-step explanation:

54 out of 75 is a percentage of 72%.

$\frac{54}{75} = 72$

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2 years ago

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sp2606 [1]

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and

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b. This can be obtained by integrating the joint density over [0.25, 1] x [0.5, 1]:

$P(X>0.25,Y>0.5)=\displaystyle\int_{1/4}^1\int_{1/2}^1(x+y)\,\mathrm dx\,\mathrm dy=\frac{33}{64}$

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3 years ago

Oliver deposited $1,640.70 in a savings account that earns 2.6% simple interest What will Oliver's account balance be in 8 month

jonny [76]

Answer:

Step-by-step explanation:

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3 years ago

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At the fair, you spend $6 for food, then use the rest of your $20 to buy ride tickets. You have enough to buy 56 tickets.

ivolga24 [154]

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3 years ago