1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
borishaifa [10]
3 years ago
6

The square of a number decreased by 15 is twice the number. find the number

Mathematics
1 answer:
jonny [76]3 years ago
6 0

Answer:

x = 5, -3

Step-by-step explanation:

x² - 15 = 2x

x² - 2x - 15 = 0

(x - 5)(x + 3) = 0

You might be interested in
An equilateral triangle has side length 10 centimeters. Find its area in square centimeters. HINT: The altitude of an equilatera
dmitriy555 [2]
30cmsquared hope this helps!!!!!
3 0
3 years ago
1) Madison went shopping and spent $125 she paid $45 in Texas what was the sale tax rate (percent)
Gnesinka [82]

Answer:

170

Step-by-step explanation:

<em>How the sales tax de-calculator works </em>

<em>Step 1: take the total price and divide it by one plus the tax rate. </em>

<em>Step 2: multiply the result from step one by the tax rate to get the dollars of tax. </em>

<em>Step 3: subtract the dollars of tax from step 2 from the total price. </em>

<em>Pre-Tax Price = TP – [(TP / (1 + r) x r] </em>

<em>TP = Total Price.</em>

3 0
3 years ago
Add. (3b + 5) + (2b + 4)
zaharov [31]

Answer:

\huge{ \fbox{ \sf{5b + 9}}}

Step-by-step explanation:

\star{ \text{( \: 3b + 5) + (2b + 4)}}

\text{Step \: 1 \:  :  \sf{Remove \: the \: unnecessary \: parentheses}}

\text{When \: there \: is \: a \: ( + ) \: in \: front \: of \: an \: expression \: in \: parentheses \:, there \: is \: no \: need \: to \: change \: the \: sign \: of \: each \: term \: in \: the \: expression.}

\text{That \: means, \: the \: expression \: remains \: the \: same. \: Just \: you \: have \: to \: remove \: the \: parentheses.}

\mapsto{ \sf{3b + 5 + 2b + 4}}

\text{Step \: 2 \:  : Collect \: like \: terms.}

\text{Like \: terms \: are \: those \: which \: have \: the \: same \: base.}

\mapsto{ \sf{3b + 2b + 5 + 4}}

\mapsto{ \sf{5b + 5 + 4}}

\text{ Step \: 3 \:  :  \sf{Add \: the \: numbers : 5 \: and \: 4}}

\mapsto{ \boxed {\sf{ {5b + 9}}}}

Hope I helped!

Best regards! :D

~\sf{TheAnimeGirl}

4 0
3 years ago
Which figure shows a single ray
Darya [45]

there are no figures shown.

6 0
3 years ago
Read 2 more answers
What is the Volume of the shape below?
Leona [35]

Answer:

v=720m^3

Step-by-step explanation:

v=lwh

volume=length x width x height

v=15 x 8 x 6

v=720m^3

hope this helps :)

5 0
3 years ago
Read 2 more answers
Other questions:
  • F(x)=2x+3 find the f(4)<br><br> a.11 b.8<br><br> c.9 d.5
    12·1 answer
  • Which number has exactly 3 factors?<br> 2<br> 4<br> 6<br> 8
    8·1 answer
  • Study the geometric sequence {-4, -84, -1764, -37044, ...}.
    6·1 answer
  • What is the value of x given that figure PTRA is an isosceles trapezoid ?! Please help !
    7·2 answers
  • What is the cost of 4 1/5 yards of fabric at $7.95 per yard?
    10·1 answer
  • Let f (x) = (1 − x)−1 and x0 = 0.
    11·1 answer
  • Consider the function represented by the equation y-6x-9 +0. Which answer shows the equation written in function notation
    12·1 answer
  • Plz help me my maths hw is due in a couple of hrs!!!
    8·1 answer
  • Plz help me ✌️✌️✌️✌️
    11·2 answers
  • How do you solve 57.82 divided by 0.784
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!