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
sashaice [31]
3 years ago
11

X2+5x−7 when x=2 can you help me i am wayy back of the class and next month grades close

Mathematics
1 answer:
spin [16.1K]3 years ago
4 0

Answer:

7

Step-by-step explanation:

x2 + 5x - 7

sub x = 2 in

(2 X 2) + (5 X 2) - 7

4 + 10 - 7

= 7

You might be interested in
A balloon is rising at a constant speed of 5 ftys. A boy is cycling along a straight road at a speed of 15 ftys. When he passes
Ket [755]

Answer:

  13 ft/s

Step-by-step explanation:

t seconds after the boy passes under the balloon the distance between them is ...

  d = √((15t)² +(45+5t)²) = √(250t² +450t +2025)

The rate of change of d with respect to t is ...

  dd/dt = (500t +450)/(2√(250t² +450t +2025)) = (50t +45)/√(10t² +18t +81)

At t=3, this derivative evaluates to ...

  dd/dt = (50·3 +45)/√(90+54+81) = 195/15 = 13

The distance between the boy and the balloon is increasing at the rate of 13 ft per second.

_____

The boy is moving horizontally at 15 ft/s, so his position relative to the spot under the balloon is 15t feet after t seconds.

The balloon starts at 45 feet above the boy and is moving upward at 5 ft/s, so its vertical distance from the spot under the balloon is 45+5t feet after t seconds.

The straight-line distance between the boy and the balloon is found as the hypotenuse of a right triangle with legs 15t and (45+5t). Using the Pythagorean theorem, that distance is ...

  d = √((15t)² + (45+5t)²)

7 0
3 years ago
Find the volume of a rectangular prism with length = 9, width = 5, and
MatroZZZ [7]
I’m not gonna play today at the same time
7 0
3 years ago
Do you guys the answer for number 3
ohaa [14]

Answer:

the answer is L. or the last answer

Step-by-step explanation:

you have to find the total area of the place first...

which is 21*17=357

then subtract the inner area (white area) which is

14*20=280

do 357-280 to get the remaining area and the answer is 77ft^2

hope this helps.. vote, comment, thanks, and maybe mark me brainliest lol idk

3 0
3 years ago
The distance between earth and moon is 384000000 m. this distance can be expressed as ____m
zalisa [80]

This distance can be expressed as 3.84× 10^{8} m.

What is distance with example?

  • Distance is a scalar quantity.
  • The distance of an object can be defined as the complete path travelled by an object.

Given the distance between the earth and the moon is 384000km

Representing in exponential notation,

=384000×1000m  [∵1km=1000m]

=384× 10^{6} m

=3.84× 10^{8} m

Learn more about distance

brainly.com/question/22698433

#SPJ4

<u>The correct question is -</u>

The distance between the Earth and the moon is approximately 384000 km.  this distance can be expressed as ____m.

5 0
2 years ago
Function for g whose graph is similar to f(x)=3x^2 shifted right 6 units and upward 5 units
vladimir2022 [97]

f(x) = 3 {x}^{2}

function g has to be the transformation of function f. Therefore,

g(x) = 3 {(x - 6)}^{2}  + 5

is the answer.

8 0
3 years ago
Other questions:
  • at silver gym membrship is 25$ per month and personal training sessions are thirty dollars each.At fit factor membership is 65$
    10·2 answers
  • Is 2 1/6 a irrational?
    5·1 answer
  • For every 3 presents lisa wrapped, helen wrapped 5. if they wrapped a total of 184 how many did each wrap. ( how did you get the
    12·1 answer
  • Find the vertex, focus, directrix, and focal width of the parabola.
    7·2 answers
  • 20 earth pounds on the moon
    11·1 answer
  • 5 is one-fourth of a number c.
    13·2 answers
  • Enter the equation of the circle described below.<br><br> Center (3, -2), radius = 5
    14·1 answer
  • Ok i hope this is the last one 26 yd.=_in.
    15·2 answers
  • Isaac used 1/4 of an ounce of nuts to make 1/8 of a cake. How many ounces of nuts are needed to make one cake?
    13·1 answer
  • Consider the linear function f(x)=4x-5 Find the values of x for which f(x)=3,f(x)=5,f(x)=-3
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!