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Yuki888 [10]
3 years ago
12

Which number sentence is not true?A.|-4.5| = 4.5 B.|0| < |-45| C.|45| > 0 D.|4.5| > |-45|

Mathematics
2 answers:
dexar [7]3 years ago
8 0

Answer:

D

Step-by-step explanation:

Reminder that | x | = | - x | = x

A

| - 4.5 | = 4.5 ← True

B

| 0 | = 0 and | - 45 | = 45 ⇒ 0 < 45 ← True

C

| 45 | = 45 and 45 > 0 ← True

D

| 4.5 | = 4.5 and | - 45 | = 45 and 4.5 < 45 ← False


IRISSAK [1]3 years ago
6 0

Answer:

B.|0| < |-45|

Step-by-step explanation:

B is right because -45 is a negative and 0 isn't, 0 is bigger than -45. And A. C. and D. are all correct.

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Write a system of equations and solve. Three times the first number minus two times the second number equals -7. The second numb
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Answer:

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Step-by-step explanation:

Let the numbers be x and y

<u>Three times the first number minus two times the second number equals -7:</u>

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<u>Substitute y in the first equation and solve for x:</u>

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8 0
3 years ago
Solve. -5x - 3y = -20
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Answer:

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6 0
3 years ago
Paddy and Anna each invest $2000 for 5 years.
Serga [27]

Answer: r= 1.22

Step-by-step explanation:

Formula for amount with simple interest = P(1+rt)

, where

P= principal value , r= rate of interest , t = time.

Given: P=  $2000, t= 5 years, r= 1.25% = 0.0125

A=2000(1+0.0125\times5)\\\\=2000(1.0625)=2125

Formula to compute compound amount : P(1+r)^t

=2000(1+r)^5

When both have same worth then

2000(1+r)^5=2125\\\\\\ (1+r)^5=\dfrac{2125}{2000}\\\\\\ (1+r)^5=1.0625

taking log on both sides , we get

5\ln (1+r)=\ln 1.0625\\\\\\ 5\ln (1+r)=0.0606246\\\\\\ \ln (1+r)=0.012125\\\\\\ 1+r=e^{0.005266}\\\\\\ 1+r=1.0122\\\\ r=0.0122\\\\ \\ r=1.22\%

Hence, Value of r= 1.22

6 0
3 years ago
A survey of 100 students was taken concerning their knowledge of foreign languages. The results were as follows: 30 know French1
Sati [7]
35 students would not know any of the three languages, because if 30 know French, 19 knew German, and 16 knew Russian, that must mean that 65 students know at least one of the three languages. So you subtract 65 from 100 and end up with 35
5 0
4 years ago
Read 2 more answers
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