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sergeinik [125]
3 years ago
13

Original amount 120 and new amount is 30. what is the amount of decrease and percent of decrease

Mathematics
2 answers:
Lady bird [3.3K]3 years ago
5 0
To find how much it was decreased by, subtract the original amount by the new amount:

120 - 30 = 90
So 120 was decreased by <u>90</u><u>
</u>
First we find what percent 30 is of 120. We do this by dividing the new amount by the original amount, and then multiply by 100 to change the answer from a decimal to a percentage.

30 / 120 x 100 = 25%

This tells us that 30 is 25% of 120. Now we subtract 100% by 25%, to get the percentage decrease:

100 - 25 = 75%
-------------------------------------------------------------------------------------------------------------
Answer:
So the amount of decrease was 90 
And the percentage decrease was 75%

blagie [28]3 years ago
4 0
0.04 i think im right hope this helps
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Select the postulate or theorem that you can use to conclude that the triangles are similar.
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Answer: SAS similarity postulate

Step-by-step explanation:

According to SAS postulate of similarity, two triangles are called similar if two sides in one triangle are in the same proportion to the corresponding sides in the other, and the included angle are congruent.

In triangles, QNR and MNP,

\frac{QN}{MN} = \frac{QM+MN}{MN} = \frac{10+8}{8} = \frac{18}{8} = \frac{9}{4}

\frac{NR}{NP} = \frac{NP+NR}{NP} = \frac{10+8}{8} = \frac{18}{8} = \frac{9}{4}

\implies \frac{QN}{MN} = \frac{NR}{NP}

Also,

\angle QNR\cong \angle MNP  (Reflexive)

Thus, By SAS similarity postulate,

\triangle QNR\sim\triangle MNP

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8 0
3 years ago
Which of the following integers is a perfect square?<br><br> A 36<br> B 48<br> C 44<br> D 32
Anika [276]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
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Hey ok i need help on this question ive been stuck on it for a couple minutes haha
Len [333]

Answer:

The side s has a length of 4 and side q has a length of 4\sqrt{3} ⇒ F

Step-by-step explanation:

In the 30°-60°-90° triangle, there is a ratio between its sides

side opp (30°) : side opp (60°) : hypotenuse

       1               :         \sqrt{3}            :        2

In the given triangle

∵ The side opposite to 30° is s

∵ The side opposite to 60° is q

∵ The hypotenuse is 8

→ Use the ratio above to find the lengths of s and q

side opp (30°) : side opp (60°) : hypotenuse

       1               :         \sqrt{3}            :        2

       s               :          q             :        8

→ By using cross multiplication

∵ s × 2 = 1 × 8

∴ 2s = 8

→ Divide both sides by 2

∴ s = 4

∴ The length of s is 4

∵ q × 2 = \sqrt{3} × 8

∴ 2q = 8\sqrt{3}

→ Divide both sides by 2

∴ q = 4\sqrt{3}

∴ The length of q is 4\sqrt{3}

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