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miv72 [106K]
3 years ago
14

Is this right or not please say​

Mathematics
2 answers:
Inessa [10]3 years ago
8 0
Yes, your answer is correct
KATRIN_1 [288]3 years ago
7 0

Answer:

yup you're answer is correct

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How can mental math help you find solutions to inequalities?
shepuryov [24]

Answer:

There are many examples the basics are also easy to remember.

Step-by-step explanation:

We can input these for the following equation.

x > 5

(x is greater than 5)

Then compare to - x < 5

(minus x is less than 5)

We try a sum

3x -2 ≤ 1

we can then balance subtract -2

3x ≤ -1

then divide by 3

x= -1 /3

We try another value

3x -2 ≤ 0

1 ≤ 3x

1/3 ≥ x

We can check that each equality fits and alter the number accordingly.

For the first one we are saying it is no greater than 1

For the second we say it is greater than zero.

We are able to prove both have the answer.

Just like when we look for negative percentages and count down we record this as we count in mental math.

7 0
3 years ago
Mr. Salazar assigns the same number of homework questions each school day. The ratio table below shows the total number of homew
vivado [14]

Answer The Answer is 80

Step-by-step explanation:

4*5=20

8*5=40

11*5=55

so 16*5=80

7 0
2 years ago
Read 2 more answers
Richard’s store sells pineapples and grapefruits. Pineapples originally cost $5.15 apiece, and grapefruits originally cost $2.25
sveta [45]

Answer:

c. The price of grapefruits experienced a reduction 6.01 percentage points greater than the price of pineapples.

Step-by-step explanation:

The original price of Pineapples=$5.15

New price of Pineapples=$3.88

<u>Find change in price of Pineapples</u>

Change in price=original price- new price

=5.15-3.88=1.27

The price of Pineapple was reduced by $1.27

<u>% reduction in price</u>

(reduction value/original value) × 100

=\frac{1.27}{5.15} *100=24.66

=24.66%

The original price of grape fruits=$2.25

New price of grape fruits=$1.56

<u>Change in price of grape fruit</u>

Change in price= original price -new price

=2.25-1.56=0.69

<u>% reduction in price of grape fruits</u>

(reduction value/original value)×100

=\frac{0.69}{2.25} *100=30.67

=30.67%

<u>Answers</u>

The fruit that has its price reduced by a greater percentage is grape fruit

How many percentage points greater = 30.67%-24.66% = 6.01 points

5 0
3 years ago
Read 2 more answers
Please answer I’ll rate brainlyest
dimulka [17.4K]

Answer:

49.1%

Step-by-step explanation:

From the table, the number of male voters who are registered Democrats is given as 600. Moreover, the total number of male voters is given as 1222. Therefore, the probability that a randomly chosen male voter is a registered Democrat will be calculated as;

number of male voters who are registered Democrats /  total number of male voters

600/1222 = 0.491

As a percentage this becomes;

0.491 * 100 = 49.1%

5 0
2 years ago
Below is an attempt to derive the derivative of sec(x) using product rule, where x is in the domain of secx. In which step, if a
4vir4ik [10]

The error occurs in step 3. By the product rule, we have

\dfrac{\mathrm d}{\mathrm dx}(\sec x\times\cos x)=\dfrac{\mathrm d}{\mathrm dx}(\sec x)\times\cos x+\sec x\times\dfrac{\mathrm d}{\mathrm dx}(\cos x)

=\dfrac{\mathrm d}{\mathrm dx}(\sec x)\times\cos x\boxed{+\sec x\times(-\sin x)}

=\dfrac{\mathrm d}{\mathrm dx}(\sec x)\times\cos x\boxed{-\sec x\times\sin x}

(i.e. there is a missing factor of \sin x)

Then

\dfrac{\mathrm d}{\mathrm dx}(\sec x)\times\cos x-\sec x\times\sin x=0

\implies\dfrac{\mathrm d}{\mathrm dx}(\sec x)\times\cos x=\sec x\times\sin x

\implies\dfrac{\mathrm d}{\mathrm dx}(\sec x)=\dfrac{\sec x\times\sin x}{\cos x}

\implies\dfrac{\mathrm d}{\mathrm dx}(\sec x)=\sec x\times\tan x

6 0
2 years ago
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