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Ira Lisetskai [31]
3 years ago
11

A certain number was multiplied by 4. Then, this product was divided by 19.4. Finally 6.4 was subtracted from this quotient, res

ulting in a difference of -8.4, What was this number?
Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
6 0

Answer:

-9.7

Step-by-step explanation:

we can do the opposite of everything that was done to get the resulting difference

so......

-8.4+6.4=-2

-2x19.4=-38.8

-38.8/4=-9.7

and to double check.......

-9.7x4=-38.8

-38.8/19.4=-2

-2-6.4=-8.4

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alexandr1967 [171]
The correct answer is 70 because 420 divided by 6 is 70.
8 0
3 years ago
A washer and dryer cost $869 combined. The washer cost $81 less than the dryer. What is the cost of the dryer?
marysya [2.9K]
W+d=869
w=d-81
plug in
(d-81)+d=869
2d-81=869
+81 both sides
2d=950
÷2 both sides
d=475
dryer cost $475

let's check w=475-81
w=394
475+394=869
869=869
the solution is true :)


7 0
3 years ago
Read 2 more answers
38. Which equation represents the data in<br> the table?
sergejj [24]

Answer:

C. y = 2x -4

Step-by-step explanation:

We can use the points (0, -4) and (2, 0).

y = mx + b (m is slope, b is y-intercept)

m = delta y / delta x

m = 4 / 2

m = 2

y = 2x + b

We can plug in (2, 0):

0 = 4 + b

b = -4

y = 2x - 4

6 0
3 years ago
Read 2 more answers
A recipe requires 1/4 lb of onions to make 3 servings of soup. Mark has 1 1/2 lb of onions. How many servings can Mark make?
Oxana [17]
⓵ You have to do a cross product in order to find your answer :

1/4 lb → 3 servings
1 ½ lb → × servings

(3 x 1 ½) ÷ 1/4 = (3 x 1,5) ÷ 0,25

⓶ Now you need to solve the equation :

(3 x 1,5) ÷ 0,25

↓

(4,5) ÷ 0,25

↓

4,5 ÷ 0,25 = 18

Which means that your final answer is that Mark can make 18 servings with 1 ½ lb of onions!

I hope this helped! ☻
6 0
3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
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