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3 years ago

Find the Sum of the Difference (-2x + 3) - (7x -10)

Mathematics

1 answer:

MA_775_DIABLO [31]3 years ago

7 0

(-2x + 3) - (7x -10)

= (-2x + 3 - 7x +10)

Hope this will help...

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While completing a race, Will spent 14 minutes walking. If his ratio of time walking to jogging was 7 : 6, how many minutes did

worty [1.4K]

Answer:

12 minutes

Step-by-step explanation:

$\frac{7}{6} =\frac{14}{x}$

$7x=84$

$x=12$

So, he spent 12 minutes jogging.

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3 years ago

joan counted that 2/10 of her jelly beans were red. Dean counted that 6/10 of his jelly beans were red. Hiw much greater a fract

ch4aika [34]

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3 years ago

The object on the right is made from a square-based pyramid joined to a cuboid.

spayn [35]

Answer:

Density of steel = 80.73 gm/ $cm^3$

Step-by-step explanation:

The figure is made up of cuboid and square pyramid.

Height of cuboid, h = 9 cm

Length of cuboid, l = 6 cm

Width of cuboid, w = 6 cm

Volume of cuboid is given by the formula:

$V_{Cuboid} = l \times w \times h$

$V_{Cuboid} = 6 \times 6 \times 9\\\Rightarrow V_{Cuboid} = 324\ cm^3$

Density of Wood , $D_{Cuboid}$ = 0.68g/ $cm^3$

We know that formula of Density is:

$Density = \dfrac{Weight}{Volume}$

$D_{Cuboid} = \dfrac{W_{Cuboid}}{V_{Cuboid}}\\\Rightarrow W_{Cuboid} = V_{Cuboid} \times D_{Cuboid}$

Putting the values:

$W_{Cuboid} = 324 \times 0.68 = 220.32\ gm$

Total weight = $W_{Cuboid} + W_{Pyramid}$

970 = 220.32 $+ W_{Pyramid}$

$W_{Pyramid}$ = 749.68 gm

Volume of pyramid is given as:

$V_{Pyramid}= \dfrac{1}{3} \times \text{Area of Base} \times \text{Vertical Height}$

Base is a square with side 6 cm

$V_{Pyramid}= \dfrac{1}{3} \times 6 \times 6 \times (17 -9)\\V_{Pyramid}= 96\ cm^3$

Density of Steel/Pyramid:

$D_{Pyramid} = \dfrac{W_{Pyramid}}{V_{Pyramid}}\\\Rightarrow D_{Pyramid} = \dfrac{749.68}{96}\\\Rightarrow D_{Pyramid} = 80.73\ gm/cm^3$

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3 years ago

25 FREE PIONTS TO WHOEVER ANSWERS FIRST! LOVE YALL!

faltersainse [42]

Yurrr can i please have it

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3 years ago

Read 2 more answers

How do you write 8.6 in scientific notation

aliina [53]

8.6

Since there is one number before the decimal, we don't have to move the decimal

8.6 * 10^0

Answer 8.6 * 10^0

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3 years ago