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
frutty [35]
3 years ago
7

(-2)2+3 × (-5) please helpe me answer this question

Mathematics
2 answers:
Ghella [55]3 years ago
6 0

Answer:

-19

Step-by-step explanation:

(-2)2 + 3 * (-5)

-2 * 2 = -4

3 * -5 = -15

-4 + -15 = -19

Tpy6a [65]3 years ago
4 0

Answer:

(−2)(2)+(3)(−5)

=−19

Step-by-step explanation:

You might be interested in
Radical 5* radical 2
Setler [38]

Answer:

\sqrt{10}

Step-by-step explanation:

Rule: \sqrt{a} \times \sqrt{b} = \sqrt{ab}

\sqrt{5} \times \sqrt{2} = \sqrt{5 \times 2} = \sqrt{10}

6 0
2 years ago
The coordinates of the endpoints of AB and CD are A(2,
Ratling [72]

Answer:

Option 1: CD is a perpendicular bisector of AB

Step-by-step explanation:

Let us find out the slopes of various line segments and the Distances and then we will draw the conclusions accordingly.

Formula to find slope

m= \frac{y_2-y_1}{x_2-x_1}

Formula to Find Distance between two points

D=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}

mAB ( represents , Slope of AB )

1. mAC= \frac{3-2}{2-5}=\frac{1}{-3}=-\frac{1}{3}

2. mBC=\frac{2-1}{5-8}=\frac{1}{-3}=-\frac{1}{3}

3. mCD=\frac{5-2}{6-5}=\frac{3}{1}=3

4. AC=\sqrt{(3-2)^2+(2-5)^2} =\sqrt{(1)^2+(-3)^2}=\sqrt{1+9}=\sqrt{10}

5. BC=\sqrt{(2-1)^2+(5-8)^2} =\sqrt{(1)^2+(-3)^2}=\sqrt{1+9}=\sqrt{10}

mAC = mBC  , and C is common point , hence these three are collinear points  making a straight line whole slope is -\frac{1}{3}

mAB=-\frac{1}{3}

mCD=3

mAB \times mCD = -\frac{1}{3} \times 3 = -1

Hence CD ⊥ AB

Also

From Point 4 and point 5 above , we see that

AC = CB

Hence CD bisect AB at C, also CD ⊥ AB

There fore

CD is a perpendicular bisector of AB

Therefor option 1 is true

4 0
3 years ago
Please help
Alexxx [7]

Answer:

C.) The amount of hours you drive

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
I’ll give Brainly but can somebody help me with this?
AfilCa [17]

Answer:

give me 2 minutes and I will

5 0
2 years ago
A closed, rectangular-faced box with a square base is to be constructed using only 36 m2 of material. What should the height h a
kkurt [141]

Answer:

b=h=\sqrt{6} m

Step-by-step explanation:

Let

Bas length of box=b

Height of box=h

Material used in constructing of box=36 square m

We have to find the height h and base length b of the box to maximize the volume of box.

Surface area of box=2b^2+4bh

2b^2+4bh=36

b^2+2bh=18

2bh=18-b^2

h=\frac{18-b^2}{2b}

Volume of box, V=b^2h

Substitute the values

V=b^2\times \frac{18-b^2}{2b}

V=\frac{1}{2}(18b-b^3)

Differentiate w. r.t b

\frac{dV}{db}=\frac{1}{2}(18-3b^2)

\frac{dV}{db}=0

\frac{1}{2}(18-3b^2)=0

\implies 18-3b^2=0

\implies 3b^2=18

b^2=6

b=\pm \sqrt{6}

b=\sqrt{6}

The negative value of b is not possible because length cannot be negative.

Again differentiate w.r.t b

\frac{d^2V}{db^2}=-3b

At  b=\sqrt{6}

\frac{d^2V}{db^2}=-3\sqrt{6}

Hence, the volume of box is maximum at b=\sqrt{6}.

h=\frac{18-(\sqrt{6})^2}{2\sqrt{6}}

h=\frac{18-6}{2\sqrt{6}}

h=\frac{12}{2\sqrt{6}}

h=\sqrt{6}

b=h=\sqrt{6} m

7 0
3 years ago
Other questions:
  • Which value of x is a solution of the inequality? ​
    10·1 answer
  • Choose the answer based on the most efficient method as presented in the lesson.
    11·2 answers
  • A ball is thrown into the air with an upward velocity of 20 feet per second. Its height, h, in feet after t seconds is given by
    14·1 answer
  • Which line is perpendicular to a line that has a slope of One-half?
    8·2 answers
  • The perimeter of a rectangle can be found using the expression 2L+2W where L represents length and w represents width. Find the
    9·1 answer
  • What's the square root of 6.909877
    15·2 answers
  • For f(x) = 322 - x , find the value of f(-9).
    15·1 answer
  • 2x + 9
    7·2 answers
  • Plz help me I don’t understand this
    15·2 answers
  • What is the area of ABC?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!