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4 years ago

What is two and three fifths minus one and a half

Mathematics

2 answers:

Fittoniya [83]4 years ago

8 0

The answer is one and one-tenth. In decimal form it’s 1.1.

zhannawk [14.2K]4 years ago

3 0

One and one tenth is the answer

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Factor completely. 28 - 7x^2

Studentka2010 [4]

Answer:

−7x^2+28

Step-by-step explanation:

28−7x^2

=28+−7x^2

=−7x^2+28

6 0

4 years ago

Suppose that Jamal can choose to get home from work by taxi or bus. When he chooses to get home by taxi, he arrives home after 7

qwelly [4]

Answer:

0.55

Step-by-step explanation:

There are four things you need to keep in mind,and the question is too easy to solve , so following are those four things

1)Jamal travelling by Taxi before 7 PM

It is given that Jamal uses the bus for 70 percent of the time so he will use the taxi for (100-70)%=30% of the time.

and also it is given that he arrives home by taxi after 7 PM , 15% of the time so he will arrive home by taxi before 7 PM ,(100-15)=85% of the time,

so by multiplication law of probability , the probability that Jamal will arrive by taxi before 7 PM =0.30*0.85=.255

2)Jamal travelling by Taxi after 7 PM

Similarly by considering the above situations as described in first part,

the probability that Jamal will arrive by taxi after 7 PM=0.30*0.15=.045

3) Jamal travelling by Bus before 7 PM

Now considering the case of the bus, it is given that Jamal arrives home after 7 PM 8 percent of the time. so for before 7 PM it will be 100-8= 92%

Similarly the probability that Jamal will arrive by bus before 7 PM=0.70*0.92=.644

4) Jamal travelling by Bus after 7 PM

Similarly on the basis of above explanation we can easily say that the probability that Jamal will arrive by bus after 7 PM=0.70*.08=.056

so, the probability that Jamal chose to get home from work by bus, given that he arrived home after 7 pm= $=\frac{Jamal travelling by bus after 7 PM}{(Jamal travelling by taxi after 7 PM +Jamal travelling by bus after 7 PM}$

$=\frac{0.056}{0.056+0.045}$

$=\frac{0.056}{0.101} \\=0.554$

7 0

3 years ago

3x-8<=23 AND -4x+26>=6

bazaltina [42]

Answer:

Step 1: Solve for x in the first equation

$3x-8+8\leq 23+8$

$3x\leq 31$

$3x/3\leq 31/3$

$x\leq \frac{31}{3}$

Step 2: Solve for x in the second equation

$-4x + 26-26 \geq 6-26$

$-4x\geq -20$

$-4x/-4\geq -20/-4$

Since you divide by a negative, you must flip the sign.

$x\leq 5$

4 0

3 years ago

Ket [755]

Answer: Part A = Age, Part B = 154 - 0.7a, Part C = 140 beats per minute (BPM)

Step-by-step explanation: The question states "...in beats per minute, depends on a person's age and can be represented..." and the variable is a, so a is age. To rewrite an expression, you need to multiply the number outside the parentheses with the terms inside the parentheses. In this case 0.7 * 220, which is 154 and 0.7 * a which is 0.7a. So the expression rewritten is 154- 0.7a. In order to solve question C you need to plug in the variable. So 0.7(220 - 20) or 154 - 0.7 * 20, whichever is easier. After solving, your answer will be 140 beats per minute.

5 0

3 years ago

Find the sum of the first 7 terms for the geometric series for 1/3+1+3+9+...

Kitty [74]

I think it is
(1/3)+1+3+9+27+81+243
=364/1/3
=1093/3

7 0

3 years ago