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grigory [225]
3 years ago
5

Show some work please or an explanation please. I'll give out brainlest. 3x + 5 = -x -7

Mathematics
2 answers:
Viefleur [7K]3 years ago
7 0

Step-by-step explanation:

3x+x=-7-5

4x=-12

x=-12/4

x=-3

Andre45 [30]3 years ago
5 0

Answer:

x=-3

Step-by-step explanation:

Add x to both sides.

3x+5+x=-7

Simplify  3x+5+x to 4x+5.

4x+5=-7

Subtract 5 from both sides.

4x=-7-5

Simplify  -7-5 to−12.

4x=-12

Divide both sides by 4.

x=− 12/4

Simplify 12/4  to 3

<h2><em>​x=−3 </em></h2>

​  

 

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A library wants to buy a new computer that cost $989.99. So far, the library has collected $311. 25 in donations. About how much
mel-nik [20]

Answer:

$678.74

Step-by-step explanation:

989.99-311.25 = 678.74

hoped this helped

5 0
2 years ago
The sun shines at a 30° angle to the ground. To the nearest inch, how long is the shadow cast by a 72-in. tall fence post?
tensa zangetsu [6.8K]

The length of the shadow is 124.7 in

<u>Explanation:</u>

<u />

Given:

Angle, θ = 30°

Height of the fence,  h = 72 in

Length of the shadow, l = ?

Given:

tan 30° = \frac{perpendicular}{base}  = \frac{height of the fence}{length of the shadow}

\frac{1}{\sqrt{3} } = \frac{72}{l} \\\\l = 72\sqrt{3} \\\\l = 124.7 in

Therefore, the length of the shadow is 124.7 in

5 0
3 years ago
If
Kamila [148]

Answer Interest rate = 12.3%

The compound interest formula is given by:

Where

A = Future amount

P = Present amount (Principal amount)

r = Interest rate in decimal form

n = No. of times compounded per year

t = time in years.

We can say that if:

Present amount = P

Future amount = 3P

r = 12.3/100 = 0.123

n = 1

t = ?

Substitute the values in the formula of compound interest:

Taking log on both sides.

Round off to nearest option

t ≅ 9 years

8 0
2 years ago
Hello could you help me please?
Ilya [14]

Answer:

C. 6

Step-by-step explanation:

So it says read less thann 25 books --> that means the numbers are 13,14,14,16,19,21,21,22,23, and 24 --> a total of 10 numbers

Then it says read more than 35 books --> that means the numbers are 37,41,42,43 --> a total of 4 numbers

Now, it says how many more --> that means you subtract 4 by 10 = 10 - 4 = 6

Therefore the answer is 6 more students read less than 25 books than read more than 35 books.

3 0
2 years ago
Read 2 more answers
HELP PLEASE!!!!!!!!!!!!
sleet_krkn [62]

Answer:

7 and 14

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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