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evablogger [386]
3 years ago
5

Solve the equation for y. 4.2x−1.4y=2.1

Mathematics
1 answer:
Vlada [557]3 years ago
7 0

Answer:

y=3x- 3/2

Step-by-step explanation:

4.2x−1.4y=2.1

Subtract 4.2x from each side

4.2x-4.2x−1.4y=-4.2x+2.1

-1.4y = -4.2x +2.1

divide each side by -1.4

-1.4y/-1.4y = -4.2x/ -1.4 +2.1/-1.4y

y=3x- 3/2

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Which property of equality should be used with the equation c + 5 = 78 to solve?
rjkz [21]

Answer:

Subtraction property of equality

Step-by-step explanation:

c + 5 = 78

Subtract 5 from each side using the subtraction property of equality

c+5-5 = 78-5

x = 73

5 0
3 years ago
A tire company finds that the lifespan for one brand of its tires is normally distributed with a mean of 47,500 miles and a stan
Illusion [34]

Answer:

42580 miles

Step-by-step explanation:

Mean = \mu = 47500

\sigma = 3000

The manufacturer does not want to replace more than 5% of the tires

P(X\leq x)=5\%

P(\frac{x-\mu}{\sigma}\leq \frac{x-47500}{3000})=0.05

By using normal table values :

\frac{x-47500}{3000}=-1.64

x=(-1.64 \times 3000)+47500

x=42580

Hence the approximate number of miles for the warranty is 42580 miles

6 0
3 years ago
Subtract 275000-30000
Varvara68 [4.7K]
Hi, it is 245,000 all you have to do is 70000-3000
5 0
3 years ago
Read 2 more answers
Write a word phrase for each algebraic expression:
Marianna [84]
1. Twelve increased by a number a 
2. Thirty one  less than a number r
3. The product of nineteen and a number t
4. b divided by a three
5. Three is less than a number c
6. Two is added by the number x which is divided by eight
7. Six is less than a number y which is divided by  eleven
8. Twenty one times a number d increased by thirteen

7 0
3 years ago
Please help me out!!!!
Serggg [28]

Answer:

If you are trying to solve by substitution then you have 2 different possibilities of answer forms.

First Possibility:  (Point form)   (16,8)

Second Possibility: (equation form)  x=16, y=8

<u><em>PLEASE MARK BRAINLIEST</em></u>

7 0
3 years ago
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