2 years ago

Solve the inequality 4b−4≤−20

Mathematics

1 answer:

devlian [24]2 years ago

8 0

Answer:

b ≤ -4

Step-by-step explanation:

4b−4≤−20

4b - 4 + 4 ≤ - 20 + 4

4b ≤ -16

Divide both sides by 4

b ≤ -4

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Help I’ll mark brainlist if correct :)

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Answer:

Step-by-step explanation:

The whole straight line is 180 degrees. Add 3x, 2x, and 4x all together to get 9x. Then do 180/9x. This will give you 20. x=20.

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3 years ago

Write each number without exponent 6.453 x 10^-3

Solnce55 [7]

Answer:

.006453

Step-by-step explanation:

6.453 x 10^-3

Move the decimal 3 places to the left since the exponent is negative

006.453

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2 years ago

The pentagonal prism has a perpendicular distance of 14 units between the bases. The volume of the prism is 840 cubic units. Wha

Leno4ka [110]

Answer:

Option 4. Perimeter = 30 units

Step-by-step explanation:

Since the volume of a pentagonal prism is 840 cubic units.

Perpendicular distance between the bases = 14 units

We know volume of a pentagonal prism = Area of base × distance between the bases

840 = Area × 14

Area = 840/14 = 60 square units

Now area of a pentagon

$A=\frac{a^{2}}{4}\times\sqrt{5(5+2\sqrt{5})}$

$1.72a^{2}=60$

$a^{2}=\frac{60}{1.72}=34.90$

$a=\sqrt{34.9}=5.91$

Therefore perimeter of the pentagon = 5×a = 5×5.91 = 29.54 ≈ 30 units

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3 years ago

You buy 80 of your favorite songs from a Web site that charges $0.98 for each song. What is the cost of 80 songs? Use mental m

d1i1m1o1n [39]

the songs are approximately 1 dollar each

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2 years ago

Read 2 more answers

Round 5.785 to the nearest hundreth

lawyer [7]

The answer would be 5.79
Hope I helped :)

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