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joja [24]
2 years ago
14

When four times a number is decreased by 9, the result is 19. What is the number?

Mathematics
2 answers:
Novay_Z [31]2 years ago
8 0

Answer:

7

Step-by-step explanation:

Working backwards:

19 + 9 = 28

28/ 4 = 7

Checking work:

7 x 4 = 28

28 - 9 = 19

Paha777 [63]2 years ago
7 0
7 is the answer. Hope this helps
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Pierce is making a rectangular frame for a photo collage that has a perimeter of 72.2 72.2 inches. The length of the frame is 20
Allushta [10]

Answer:

P = 2x+2y   (1)

And we know that the lenght is y = 20.3. If we solve for x from equation (1) we got:

P-2y = 2x

\frac{P-2y}{2} =x

And replacing we got:

x = \frac{72.2 in -2*20.3 in}{2}= 15.8 in

And the width for this case would be 15.8 in

Step-by-step explanation:

For this case we know that the photo is rectangular. Let's define:

x = the width,  y= the length

And we know that the perimeter is given by:

P = 2x+2y   (1)

And we know that the lenght is y = 20.3. If we solve for x from equation (1) we got:

P-2y = 2x

\frac{P-2y}{2} =x

And replacing we got:

x = \frac{72.2 in -2*20.3 in}{2}= 15.8 in

And the width for this case would be 15.8 in

4 0
4 years ago
Solve for y y-(-5)=-7
romanna [79]
Y - (-5) = -7
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Simplify
y + 5 = -7
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Subtract 5 from each side
y + 5 - 5 = -7 - 5
y = -12
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y = -12 is your answer

7 0
3 years ago
Read 2 more answers
The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).
zalisa [80]

Answer: 272

Step-by-step explanation:

Let a1=11

a2=20

a3=29

Formula for sequence=

an=a1+(n-1)d

an = nth term

a1= first term

n= nth position

d= common difference

We are looking for the 30th term,so our n=30

d= a2-a1

d= 20-11

d= 9

Using the formula

an= a1+(n-1)d

a30= 11+(30-1)9

a30= 11+(29)9

a30= 11+(29×9)

a30= 11+261

a30= 272

Therefore, the 30th term is 272

8 0
3 years ago
Can someone please help me with this problem? I tried inputting the numbers into the standard deviation equation but I did not g
Juliette [100K]

Answer:

97.8

Step-by-step explanation:

add together 97.3 +0.5

6 0
3 years ago
Danny’s 7 friends contributed an equal amount of money to buy him a birthday present. The present cost $84. How much money did e
dem82 [27]
84 divided by 7 equals 12
3 0
3 years ago
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