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4 years ago

Twice as number decreased by 9 is 7

Mathematics

1 answer:

marissa [1.9K]4 years ago

8 0

You said that. 2x - 9 = 7 . . . . . Add. 9. to each side: 2x = 16 . . . . . Divide each side by 2 : x = 8

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Mario tried to solve an equation step by step.

Zarrin [17]

Answer:

Step 2

Step-by-step explanation:

Mario made a mistake in Step 2 when substracting $\frac{1}{3}$ from $\frac{4}{3}$ . When substracting his result ended up being $\frac{2}{3}$ but it is actually....

$\frac{4}{3} - \frac{1}{3} = \frac{4-1}{3} = \frac{3}{3} = 1$

so the right answer is $q = 1$

5 0

3 years ago

What is the measurement of each angle

user100 [1]

Answer:

$7(14)-11=87\\\\5(14)-2=68\\\\2(14)-3=25$

Step-by-step explanation:

First we need to set up an equation in order to find the value of x. We know that the sum of these angles are 180°

$7x-11+5x-2+2x-3=180\\\\14x-16=180\\\\14x=196\\\\x=14$

Now we can plug in our value for x into each of the angle's equations

$7(14)-11=87\\\\5(14)-2=68\\\\2(14)-3=25$

8 0

4 years ago

18 times 9 then multiply 1/2??

lawyer [7]

Answer:

Step-by-step explanation:

18*9=162

162* $\frac{1}{2}$ =81

3 0

4 years ago

Read 2 more answers

Factor 60x2 – 155x + 100 completely

gtnhenbr [62]

Answer:

hello :

60x² – 155x + 100 = 5 ( 12 x² - 31 x + 20 )

delta of ( 12x² - 31 x + 20 ) is b² - 4ac when : a = 12 b = -31 c = 20

delta = ( - 31 )² - 4(12)(20) = 961 - 960 = 1

x1 = (31-1)/24 = 30/24 = 5/4

x2 = (31+1)/24 = 32/24 = 4/3

Factor 60x2 – 155x + 100 = 5 (12(x -5/4)(x- 4/3)) = 60 (x -5/4)(x- 4/3)

4 0

3 years ago

Read 2 more answers

3(2x + 6) - 4x = 2(5x - 2) + 6

sp2606 [1]

Answer:

x = 2

Step-by-step explanation:

$3(2x + 6) - 4x = 2(5x - 2) + 6 \\ 6x + 18 - 4x = 10x - 4 + 6 \\ 2x + 18 = 10x + 2 \\ 18 - 2 = 10x - 2x \\ 16 = 8x \\ x = \frac{16}{8} \\ \huge \: \red { \boxed{x = 2}}$

7 0

4 years ago