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4 years ago

49 - 3 + 9 times 8 divided by 2

Mathematics

2 answers:

irinina [24]4 years ago

6 0

Answer:

Step-by-step explanation:

49 - 3 + 9 times 8 divided by 2

dusya [7]4 years ago

3 0

Answer:

Step-by-step explanation:

49 -3 + 9*8/2

PEMDAS

Multiply and divide from left to right

49 -3 + 72/2

49 -3 + 36

Add and subtract from left to right

46 +36

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What is a way to find what 7 is what percent of 20 and I can't use a percent bar model?

Viefleur [7K]

Answer:

you can cross multiply or u can 7/20 to get the answer that 7 is 35% of 20

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3 years ago

I need help on 7 a-c. it could really help me if someone helps.

kondaur [170]

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3 years ago

25 pts and a mark for real answers. Help!! A store is having a sale on chocolate chips and walnuts. For 5 pounds of chocolate ch

kozerog [31]

Answer:

Each pound of chocolate chips costs $ 1.5 and each pound of walnuts cost $ 3.75 .

Step-by-step explanation:

Let, each pound of chocolate chips costs $ x and each pound of walnuts costs $ y.

Then, according to the question,

5x + 6y = 30 --------------(1) and,

3x + 2y = 12 ----------------(2)

Multiplying (2) by 3 we get,

9x + 6y = 36 ---------------------(3)

Deducting (1) from (3) we get,

4x = 6

⇒ x = 1.5 ----------------------(4)

From (4), putting the value of x in (2) , we get,

2y = 7.5

⇒ y = 3.75 ---------------------------(5)

3 0

3 years ago

If the first of three consecutive integers is subtracted from 138, the result is the sum of the second and third. What are the i

Murljashka [212]

Answer:

Step-by-step explanation:

n, n + 1, n + 2 - three consecutive integers

The equation:

138 - n = (n + 1) + (n + 2)

138 - n = n + 1 + n + 2 <em>combile like terms</em>

138 - n = 2n + 3 <em>subtract 138 from both sides</em>

-n = 2n - 135 <em>subtract 2n from both sides</em>

-3n = -135 <em>divide both sides by (-3)</em>

n = 45

n + 1 = 46

n + 2 = 47

6 0

4 years ago

1/4 times the sum of a number and −3.2 is 1.8. What is the number?

joja [24]

Answer:

10.4

Step-by-step explanation:

Let the number be x

Sum of x and -3.2 : x + (-3.2) = x - 3.2

1/4 times the sum of a number and −3.2 = (1/4) * (x - 3.2)

$\dfrac{1}{4}* \left( x - 3.2 \right) = 1.8\\\\\Multiply \ the \ whole \ equation \ by \ 4 \\\\4*\dfrac{1}{4} *(x - 3.2) = 1.8*4\\\\\\x - 3.2 = 7.2\\\\Add \ 3.2 \ to \ both \ sides\\\\\\x = 7.2 + 3.2\\$

x = 10.4

5 0

3 years ago