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schepotkina [342]
3 years ago
13

What is the slope of a line that passes through (-1, 8) and (-1, -7)?

Mathematics
1 answer:
ch4aika [34]3 years ago
8 0
Y2-y1/x2-x1. so -7-8/-1-(-1)= -15/1
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If Neil Works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday how much time will she work altogether?
jek_recluse [69]

Answer:

C

Step-by-step explanation:

3/4 + 6/10

Find a common denominator and find what you multiply to each denominator to get that number and multiply the numerator by the same amount

(3/4 * 5/5) + (6/10 * 2/2)=

15/20 + 12/20

Then add

15/20 + 12/20= 27/20

Then finally convert to mixed number

27/20 = 1 7/20

7 0
3 years ago
A standard interior staircase has steps each with a rise (height) of 21 cm and a run (horizontal depth) of 24 cm. Research sugge
Alisiya [41]

Answer:

The staircase would extends 1.20 m if the changes were made.

Step-by-step explanation:

Acording tho the statement the total heigth is 5.04 m, that is 504 cm, each steps rises 21 cm. with this information we can calculte how many steps are in the whole staircase:

Number steps= \frac{Total heigth}{each step} \\Number steps= \frac{504}{21}  = 24 steps

To calculate how much the staircase will extend, whe have to multiply the horizontal depth times the number of steps.

using the run of 24 cm that gives us a lengt of 576 cm and if the changes were made the new length will be 696 cm.

So the staircase would extend an amount of (696 - 576), that is 120 cm, or 1.20 m, if the changes were made.

6 0
3 years ago
Let n be the product of the two smallest 3-digit prime numbers. Find the sum of the digits of n.
lilavasa [31]

Answer:

Step-by-step explanation:

n = 101 × 103 = 10,403

sum of digits = 8

7 0
2 years ago
A number increased by fifteen is nineteen. A number increased by fifteen is nineteen.
elixir [45]

Answer:

the number is 4

Step-by-step explanation:

we can write this as

x + 15 = 19

now we transpose

x= 19-15

x= 4

5 0
3 years ago
How many liters of a 90% acid solution must be added to 6 liters of a 15% acid solution to obtain a 40% acid solution?
tatiyna

3 liters must be added

4 0
3 years ago
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