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3 years ago

Name 4 equivalent fractions that equall to 0.7

Mathematics

2 answers:

inn [45]3 years ago

7 0

4 equivalent fractions to seven tenths are 70/ 100 77/110 140/ 200 280/400.

Mice21 [21]3 years ago

5 0

7/10
70/100
700/1000
7000/10000

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The factorization of 8x3 – 125 is (2x – 5)(jx2 + kx + 25). What are the values of j and k

Inga [223]

Answer:

$j=4\\k=10$

Step-by-step explanation:

$8x^3 - 125$

$\left(2x\right)^3-5^3$

Use this formula:

$x^3-y^3=\left(x-y\right)\left(x^2+xy+y^2\right)$

Where,

$x=2x\\y=5$

Substitute in the values.

$\left(2x\right)^3-5^3=\left(2x-5\right)\left(2^2x^2+5\cdot \:2x+5^2\right)$

$\left(2x-5\right)\left(4x^2+10x+25\right)$

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3 years ago

An alloy consists of nickel, zinc, and copper in the ratio 2:7:9.

Alexus [3.1K]

Answer:

0.4kg, 1.4kg and 1.8kg

Step-by-step explanation:

Given parameters:

Mass of alloy = 3.6kg

Ratio of elements in the alloy = 2:7:9

Unknown:

Mass of each element in the alloy = ?

Solution:

To find the mass of each element in the alloy, first find the sum of the ratio;

2+7+9 = 18

Mass of nickel = $\frac{2}{18}$ x 3.6 = 0.4kg

Mass of zinc = $\frac{7}{18}$ x 3.6 = 1.4kg

Mass of copper = $\frac{9}{18}$ x 3.6 = 1.8kg

The mass of each metal is 0.4kg, 1.4kg and 1.8kg

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3 years ago

A typical tip in a restaurant is 15% of the total bill. If the bill is $140, what would the typical tip be?

stepladder [879]

15% / 100% = 0.15
$140 x 0.15= $21.00
Typical tip would be $21.00

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P = 10d + 100
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2. How tall is the flagpole? Use a proportion.

Reptile [31]

7.5 ft

I dont think so.. I think thats the answer

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