3 years ago

If you answer i'll give brainllest

Mathematics

2 answers:

Alex73 [517]3 years ago

6 0

Answer:

maybe a plus b

Step-by-step explanation:

GalinKa [24]3 years ago

5 0

Answer:

the first one but make sure to divide

Step-by-step explanation:

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An algebraic expression of the form a + bx has the value of 15 when x = 2 and the value of 3 when x = 5. Calculate a + b.

Ainat [17]

Answer:

The value of the expression (a +b) = 19

Step-by-step explanation:

The given expression is a + bx.

Case - I when x = 2, (a + bx) = 15

Putting the value of x , we get: a + 2b = 15

or, a = 15 - 2b ...... (1)

CAse II- when x = 5, (a + bx) = 3

Putting the value of x, we get a + 5b = 3

or a = 3 - 5b ....... (2)

Comparing (1) and (2)

15 - 2b = 3 - 5b

or, 5b - 2b = 3 - 15

or, 3b = - 12 ⇒ b = -4

if b = -4, then a = 3 - 5b = 3 + 20 = 23

Hence, a = 23, b= -4

So, the value of (a +b) = 23 - 4 = 19

6 0

3 years ago

You purchase pair of pants for $34.60 and a shirt for $12.30. If you need to pay 8% sales tax, what is the final price?

11111nata11111 [884]

Answer:

50.65

Step-by-step explanation:

34.60+12.30=46.90

8%=.08

46.90*.08=3.752

add tax to the total-

46.90+ 3.75= 50.65

4 0

3 years ago

7 is what percent of 20?

frosja888 [35]

35%

7/20

Multiply both sides by 5.

35/100

35%

7 0

3 years ago

A new roll of insulated electrical wire has 200 feet of wire. Mr.S needs pieces that are 6 1/4 feet long. How many full pieces o

lisov135 [29]

$200 \div 6 \dfrac{1}{4} \\ = 200 \div \dfrac{25}{4} \\ = 200 \times \dfrac{4}{25} \\ = 32$

Answer : He can cut 32 full pieces.

Hope this helps. - M

7 0

3 years ago

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What is the percent of increase for a population that changed from 25,000 to 30,000?

Delvig [45]

Your answer would be 20% I believe

3 0

4 years ago

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