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
Y_Kistochka [10]
3 years ago
10

Simplify the expression. -2(x + 5) - x + 4

Mathematics
1 answer:
wlad13 [49]3 years ago
7 0

Answer:

−3 x −6

Step-by-step explanation:

You might be interested in
Solve the equation<br><br> 3/4x = 60
PolarNik [594]
Multiply both sides by 4/3
x= 60 * 4/3
x= 80
7 0
3 years ago
Read 2 more answers
There are about 795 house in this region . the average family size is 6 people . there
jekas [21]

Answer:

4770 people

Step-by-step explanation:

795*6= 4770

7 0
3 years ago
Show work please<br> \sqrt(x+12)-\sqrt(2x+1)=1
Nesterboy [21]

Answer:

x=4

Step-by-step explanation:

Given \displaystyle\\\sqrt{x+12}-\sqrt{2x+1}=1, start by squaring both sides to work towards isolating x:

\displaystyle\\\left(\sqrt{x+12}-\sqrt{2x+1}\right)^2=\left(1\right)^2

Recall (a-b)^2=a^2-2ab+b^2 and \sqrt{a}\cdot \sqrt{b}=\sqrt{a\cdot b}:

\displaystyle\\\left(\sqrt{x+12}-\sqrt{2x+1}\right)^2=\left(1\right)^2\\\implies x+12-2\sqrt{(x+12)(2x+1)}+2x+1=1

Isolate the radical:

\displaystyle\\x+12-2\sqrt{(x+12)(2x+1)}+2x+1=1\\\implies -2\sqrt{(x+12)(2x+1)}=-3x-12\\\implies \sqrt{(x+12)(2x+1)}=\frac{-3x-12}{-2}

Square both sides:

\displaystyle\\(x+12)(2x+1)=\left(\frac{-3x-12}{-2}\right)^2

Expand using FOIL and (a+b)^2=a^2+2ab+b^2:

\displaystyle\\2x^2+25x+12=\frac{9}{4}x^2+18x+36

Move everything to one side to get a quadratic:

\displaystyle-\frac{1}{4}x^2+7x-24=0

Solving using the quadratic formula:

A quadratic in ax^2+bx+c has real solutions \displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}. In \displaystyle-\frac{1}{4}x^2+7x-24, assign values:

\displaystyle \\a=-\frac{1}{4}\\b=7\\c=-24

Solving yields:

\displaystyle\\x=\frac{-7\pm \sqrt{7^2-4\left(-\frac{1}{4}\right)\left(-24\right)}}{2\left(-\frac{1}{4}\right)}\\\\x=\frac{-7\pm \sqrt{25}}{-\frac{1}{2}}\\\\\begin{cases}x=\frac{-7+5}{-0.5}=\frac{-2}{-0.5}=\boxed{4}\\x=\frac{-7-5}{-0.5}=\frac{-12}{-0.5}=24 \:(\text{Extraneous})\end{cases}

Only x=4 works when plugged in the original equation. Therefore, x=24 is extraneous and the only solution is \boxed{x=4}

4 0
2 years ago
HELP!! please explain how you got the answer too.
nydimaria [60]

Answer:

Point H does lie on the graph y = 4.6x - 7

Step-by-step explanation:

Step 1: Define

y = 4.6x - 7

H(0, -7)

Step 2: Substitute, Evaluate, and Check

-7 = 4.6(0) - 7

-7 = 0 - 7

-7 = -7

4 0
3 years ago
Read 2 more answers
What is the area, in square units, of triangle $ABC$ in the figure shown if points $A$, $B$, $C$ and $D$ are coplanar, angle $D$
Zolol [24]

Answer:

The answer is 24.

6 0
3 years ago
Other questions:
  • MATH HELP ME ASAP!!!!
    12·1 answer
  • Three poultry farms B1, B2, and B3 supply chicken eggs to the same local market. The market performs some quality testing on the
    6·1 answer
  • The number of words w Tina can type per minute is at least 50. Write and graph an inequality to describe this situation
    11·2 answers
  • Suppose you buy a CD for $900 that earns 8% APR and is compounded quarterly. The CD matures in 3 years. Assume that if funds are
    8·1 answer
  • Factor:
    10·1 answer
  • Garrett has one dollar less than three times as much money as Liz has. Together they have $179. What equation would you set up t
    11·1 answer
  • . En un concesionario de coches hay modelos de varios colores. Los rojos suponen 1 6 del total, los azules, 2 9 del total, y los
    5·1 answer
  • Simplify the following expression by combining like terms:<br> 5a + 4b - 5c + 6a + 9b
    11·1 answer
  • A shoe store orders shoes from the manufacturer and sells them at a mall. Storing shoes at the store costs $3 per shoe pair for
    15·1 answer
  • john likes to walk the steps of the department he works for during lunch break. There are s steps in his department. Today John
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!