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3 years ago

1. 8 + 2×=17 x= 2. 2/7x +4 =8

Mathematics

1 answer:

Alenkinab [10]3 years ago

6 0

1. X = 4.5
2. X= 14 I’m not sure for 2 but number one is write

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Solve the system of linear equations by elimination.<br> 9x+2y=39<br> 6x+13y=−9

vodomira [7]

y = -3

x = 5

Explanation:

$9x + 2y = 39 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (2)\\ 6x + 13y = - 9 \: \: \: \: \: \: \: \: \: \: \: \: ( - 3) \\ \\ 18x + 4y = 78 \\ - 18x - 39y = 27 \\ \\ - 35y = 105 \\ y = \frac{105}{ - 35} \\ y = - 3 \\ \\ \\ 9x + 2y = 39 \\ 9x + 2( - 3) = 39 \\ 9x - 6 = 39 \\ 9x = 39 + 6 \\ 9x = 45 \\ x = \frac{45}{9} \\ x = 5$

3 0

2 years ago

Simplify:<br> 4 x 32 - 3+5x2 = <br> A. 33<br> B. 43<br> C. 36<br> D. 58<br> E. 34

NeX [460]

I got 155‍♀️ I don’t know cause I did PEMDAS and got 155

3 0

3 years ago

Read 2 more answers

0.07 is a smallest fraction?

Vinvika [58]

0.07 is 7/100 (that is the simplest fraction)

8 0

3 years ago

The equation

ra1l [238]

<h2>Explanation:</h2>

Let's use a trial and improvement method to find this solution.

Step 1. Let's choose x = 8.5

Substituting into the equation:

$(8.5)^2+ 3(8.5) - 94=0? \\ \\ 72.25+25.5-94=0? \\ \\ 3.75\neq 0$

Step 2. Let's choose x = 8.4

Substituting into the equation:

$(8.4)^2+ 3(8.4) - 94=0? \\ \\ 70.56+25.2-94=0? \\ \\ 1.76\neq 0$

Step 3. Let's choose x = 8.3

Substituting into the equation:

$(8.3)^2+ 3(8.3) - 94=0? \\ \\ 68.89+24.9-94=0? \\ \\ -0.21\neq 0$

Since the sign of the equation changes from positive to negative when evaluating from 8.4 to 8.3, then x = 8.3 seems to be a reasonable value. Finally, the solution to 1 decimal place is:

$x=8.3$

6 0

3 years ago

(b) A color printer prints 26 pages in 10 minutes.

sdas [7]

Answer:

Equals to 0.384 seconds (round if needed)

Step-by-step explanation:

10 / 26 = 0.384615385

5 0

3 years ago