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Leno4ka [110]
3 years ago
8

Verify whether the point (2,5) lies on 2x -y+1=0 or not

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
3 0

Answer:

yes verified

Step-by-step explanation:

2x-y+1=0

substitute

2(2)-5+1=(0?)

4-5+1=0

yes

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The graph shows the proportional relationship between the minutes Oliver
stepladder [879]

Step-by-step explanation:

Given

A proportional relation is given between minutes spend in reading and no of pages

Suppose we choose the point (2,3), It shows that 2 minutes is taken to read three pages.

Similarly, for point (4,6), It shows four minutes is taken to read 6 pages.

In this way, 6 minutes is taken for 12 pages.

8 0
3 years ago
Please help
earnstyle [38]

Please consider the graph of the sphere.

We know that the volume of sphere is equal to \frac{4}{3}\pi r^3, where r represents radius of sphere.

We can see that diameter of sphere is 30 inches. We know that radius is half the diameter, so radius of the given sphere would be half of 30 inches that is \frac{30}{2}=15 inches.

V=\frac{4}{3}\pi r^3

V=\frac{4}{3}\pi (15\text{ in})^3

V=\frac{4}{3}\pi \times 3375\text{ in}^3

V=4\times 1125\pi \text{ in}^3

V=4500\pi \text{ in}^3

Therefore, the volume of the given sphere is 4500\pi\text{ in}^3 and option B is the correct choice.

8 0
3 years ago
Cheryl is planning to go to a four-year college in two years. She develops a monthly savings plan using the estimates shown. Wha
Alik [6]

Answer:

$541.67 per month

Step-by-step explanation:

Tuition and other expenses = $8,250 per semester.

There are two semesters in a year

She has 4 years to spend

Total semester=4years*2semesters

=8 semesters

4 years in college which is a total of 8 semesters.

Total Tuition and other expenses = $8,250 * 8

= $66,000

She needs a total of $66,00 to complete her college

Assistance from parents=$15,000

Financial aid(per semester)=$4750

Total financial aid=$38,000

Total assistance=

Assistance from parents+ financial aid

=$15000+$38,000

=$53,000

Total savings=Total amount needed - Total assistance

=$66,000 - $53,000

=$13,000

She needs to save $13,000 in two years

There are 12 months in one year

2 years=2*12=24 months

Monthly savings=Total savings/24 months

=$13,000/24

=$541.666666

To the nearest cent

=$541.67

3 0
3 years ago
7xy + 8z - 2z + 12xy + 10z
cestrela7 [59]

Answer:

19xy + 16z

Step-by-step explanation:

combine like terms

7xy +1 2xy= 19xy

8z - 2z + 10z = 16z

7 0
3 years ago
I need help with 1-4
worty [1.4K]
1) the longest side is 5cm and the perimeter is 12cm
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4) Yes it is
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