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Sholpan [36]
3 years ago
13

How to solve this equation and check it. a - 2.5 = 4.5?

Mathematics
1 answer:
Bezzdna [24]3 years ago
5 0

Answer:

Step-by-step explanation:

a - 2.5 = 4.5

     2.5 = 2.5

a = 7.0 or 7

7.0 - 2.5 = 4.5

4.5 = 4.5

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Tiwa spent 1 1/2 hours setting up her computer. It took her 3 times as long to install the software. How long did it take Tiwa t
MrRissso [65]

Answer:

Total time spent by Tiwa to set up the computer and install software = 6 hours

Step-by-step explanation:

Given:

Time spent by Tiwa to set up  her computer = 1\frac{1}{2}\ hours

Time spent to install the software is 3 times the time she took to set up the computer.

To find the total time Tiwa took to set up her computer and install the software.

Solution:

Time spent by Tiwa to install the software can be given as:

⇒ 3\times 1\frac{1}{2} \ hours

<em>In order to multiply mixed numbers we first change them to fractions.</em>

We multiply the denominator to the whole number and add the numerator to it. Then we write the number as numerator of a fraction with the same denominator.

So, 1\frac{1}{2}=\frac{3}{2}

So, we have:

⇒ 3\times \frac{3}{2}\ hours

⇒ \frac{9}{2}\ hours

Total time spent by Tiwa to set up the computer and install software can be given as:

⇒ \frac{3}{2}\ hours+\frac{9}{2}\ hours

Since denominators are same, so we simply add the numerators.

⇒ \frac{3+9}{2}\ hours

⇒ \frac{12}{2}\ hours

⇒ 6\ hours

4 0
3 years ago
What is a polyhedral?
Naily [24]
A polyhedral is a shape that is flat and that has straight sides. 
3 0
3 years ago
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The diameter d in inches of a rope required to lift a weight of w tons is given by the function d = 10w/ π . How much weight can
Ilia_Sergeevich [38]

Answer:

Option D) 1.26 tons

Step-by-step explanation:

we have

d=\frac{10w}{\pi}

where

d is the diameter of a rope in inches

w is the weight in tons

we have

d=2(2)=4\ in ----> the diameter is two times the radius

substitute the value of d and solve for w

4=\frac{10w}{\pi}

w=\frac{4\pi}{10}=0.4\pi\ tons

assume

\pi =3.14

0.4(3.14)=1.26\ tons

7 0
3 years ago
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Sonia graphs the equations y = –x2 + 4x and y = x – 4 to solve the equation –x2 + 4x = x – 4. Her graph is shown below.
ipn [44]
The line and parabola intersect at x=-1 and x=4, so your solution is C. –1 and 4
3 0
3 years ago
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Three times a number, minus 2, is equal to two times the number, plus 7.
WINSTONCH [101]

Answer:

3x - 2 = 2x + 7

Step-by-step explanation:

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3 years ago
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