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3 years ago

Solve for a in the equation a – 17 = 42

Mathematics

2 answers:

VARVARA [1.3K]3 years ago

8 0

Hi there! :)

Answer:

a=59

*The answer must have a positive sign.*

Step-by-step explanation:

<h2>Lesson: Addition property of equality</h2>

$a+c=b+c$

First, you add by 17 from both sides of an equation.

$a-17+17=42+17$

And then, you simplify and solve. You can also add by the numbers from left too right.

$42+17=59$

Final answer is a=59

Hope this helps! :)

Have a great day!

-Charlie

Gnoma [55]3 years ago

6 0

Answer: a = 59

Step-by-step explanation:

a = 42 + 17

a = 59

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3 years ago

Read 2 more answers

Solve using the quadratic formula 2x^2+8x-5=0

Ede4ka [16]

Step-by-step explanation:

Hey there!!

Given,

${x}^{2} + 8x - 5 = 0$

Comparing it with ax^2+bx+c =0 we get,

a= 1, b= 8, c= -5.

Using formula,

$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac } }{2a}$

Keep all values,

$x = \frac{ - 8 + - \sqrt{ {8}^{2} - 4 \times 1 \times ( - 5)} }{2 \times 1}$

$x = \frac{ - 8 + - \sqrt{64 + 20} }{2}$

$x = \frac{ - 8 + - \sqrt{84} }{2}$

$x = \frac{ - 8 + - 2 \sqrt{21} }{2}$

Taking negative,

$x = \frac{ - 8 - 2 \sqrt{21} }{2}$

$x = \frac{ - 2(4 + \sqrt{21}) }{2}$

$x = 4 + \sqrt{21}$

Similarly, taking positive,

$x = \frac{ - 8 + 2 \sqrt{21} }{2}$

$x = \frac{ - 2(4 - \sqrt{21} ) }{2}$

$x = 4 - \sqrt{21}$

Therefore, x= (4 + root 21, 4 - root 21).

Hope it helps.....

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3 years ago

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deff fn [24]

Answer:

162

Step-by-step explanation:

225 x 0.72 = 162

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3 years ago

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Step-by-step explanation:

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2 years ago

What Is ?1-2?=34 in Math?

s344n2d4d5 [400]

Answer:

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Step-by-step explanation:

start with the ones place:

1-?=4

since 1 minus anything will never give a 4 add 10

11-?=4

11-4=?=7

then start with the tens place:

?1-27=34

?1=34+27

?1=61

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4 years ago