2 years ago

Hi friends,

Mathematics

1 answer:

Fiesta28 [93]2 years ago

4 0

d = b - 3 / 10

Step-by-step explanation:

b = 10d + 3

Place +3 in the other side of the equal sign
+ 3 becomes - 3
b - 3 = 10
Divide both sides by 10 to make d the subject
b - 3 / 10 = 10d / 10
d = b - 3 / 10

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Please help and explain so I understand!!

olga_2 [115]

Answer:

x=5

Step-by-step explanation:

$4x^2-11=89$

add 11 to both sides

$4x^2=100$

Divide 4 on both sides

$x^2=25$

Take the square root of both sides to eliminate the power of two from x

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2 years ago

Solve the system of equations by substitution y=5x-13 and 5x+2y=19

castortr0y [4]

Y = 5x - 13 ----------- (1)
5x + 2y = 19 --------- (2)

Sub (1) into (2):

5x + 2(5x -13) = 19
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3 years ago

Write the ratio as a fraction: 2 1/3 : 4 1/2

chubhunter [2.5K]

7/3 and 9/2
Hope this helps!
And please thank me by pressing the 'Thank You' button :) ^.^

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3 years ago

1. Add or subtract. Show your work for each problem.

Aleks04 [339]

Hi there!

a. 8x^2 - 1
(x^2 - 4x + 5) + (7x^2 + 4x - 6)
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b. 5x^2 + 7x - 7
(7x^2 + 4x - 6) - (2x^2 - 3x + 1)
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3 years ago

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Lapatulllka [165]

If I did my math correctly I believe your answer will be C. :)

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3 years ago

Read 2 more answers