Record and practice journal

answer:

the nervous system is a system in which your brain sends and receives messages about things in and around your body.

good luck :)

hopefully, this helps

have a great day !!

Answer:

the nervous system is a system in which your brain sends and receives messages about things in and around your body.

Step-by-step explanation:

Hope This Help??

Please Mark Me Brainly?

Answer:

20.76 ✨

hope that helped!!!!

Answer:

i think it's $60.68

Step-by-step explanation:

if I'm wrong plz correct me

Answer:

0.65

Step-by-step explanation:

Given equation:

P = 0.65n

where,

P = price

n = number of pears

What is the constant of proportionality?

The constant of proportionality is 0.65

For example

Find P when n = 2

P = 0.65n

= 0.65(2)

P = 1.3

Answer:

y=-2x+1

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-3-3)/(2-(-1))

m=-6/(2+1)

m=-6/3

m=-2

y-y1=m(x-x1)

y-3=-2(x-(-1))

y-3=-2(x+1)

y=-2x-2+3

y=-2x+1

Answer:

h/8 hope it helps youuuuuuuuu

Answer:

REPORT THIS AWNSER

Step-by-step explanation:

Answer:

c can't equal 8 bc if it did, the answer would be thirteen, not fourteen. c has to equal 9.

Step-by-step explanation:

Answer:

-.25

Step-by-step explanation:

1/4 is equal to a quarter, or .25. its negative because the fraction is negative

Answer:

-.25

Step-by-step explanation:

1/4 is like one quarter which is 25 cents so .25, but u said negative so 0.25

Answer:

Sorry, it's gonna be 0.97, and you just add 0.12 to 0.25 7 times. This is the right answer.

Step-by-step explanation:

Answer:

the third one I think please see be right

Answer: The answer is 96

Step-by-step explanation: your have to measure the length by width(6x12) then subtract 12 from 20 which is 8 then divide by 2 and you get 4 so when you have 6x4=24÷2(because its a triangle)=12 since theres 2 triangles multiply by 2 so add 12+12+72 and you get 96

The ratio 4:7 means for every 4 men there are 7 women.

Divide total number of men by 4:

487/4 = 121.75

Multiply that by 7:

121.75*7 = 852.25 Round to the nearest whole number.

There is approximately 852 women.

Answer:

See the expression below

Step-by-step explanation:

Given data

We have the expression  

-4x+y=11-----------1

from 1 make y subject of formula we have

y=100+4x

Make x subject of the formula we have

-4x=11-y

divide both sides by -4

x=(11-y)/-4

Answer:

Step-by-step explanation:

Write an equation:

the slope would be -6 / 2 = -3

in point slope form:

y = -3(x+2)

simplify:

y = -3x - 6

Check if (2, 6) is a point:

6 = -3 * 2 - 6

6 = -6 - 6

6 = -12

Not true. The point is not on the graph.

Answer:

6i+9j-15k

Step-by-step explanation:

multiply every thing by 3

Answer:

1. 130°

2. corresponding

3. congruent

Step-by-step explanation:

Answer: 13

Step-by-step explanation:

Given

there are 4 sandwiches that each measures 12 inches

If they were cut into

[tex]3\ \dfrac{2}{3}\ in.=\dfrac{3\times 3+2}{3}=\dfrac{11}{3}\ in.[/tex]

Now, it becomes

[tex]\Rightarrow \text{No of sandwiches}=\dfrac{4\times 12}{\frac{11}{3}}=\dfrac{4\times 12\times 3}{11}=13.09\approx 13[/tex]

Now, there are 13 sandwiches

Answer:

slope is -1

Step-by-step explanation:

Answer:

Step-by-step explanation:

Let ( x1 , y1) = ( -4 ,1 )

(x2 , y 2) = ( -2 , -1 )

Now

slope (m)

= ( y2 - y1) / (x2 -x1)

= ( -1 - 1) / ( - 2 + 4)

= -2 /2

= - 1

Hope it helps :)

Answer:

Amy

ED

ED

ED

ED

Step-by-step explanation:

Question

Daniel expanded the expression as shown. What errors did he make? Select three options.

[tex]-2(-8x-4y+3/4)=-10x-8y-1 \frac{1}{4}[/tex]

A. The first term should be positive.

B. The second term should be positive.

C. The last term should be -1 1/2, not -1 1/4.

D. He divided -8 by -2 instead of multiplying -8 by -2.

E. He did not simplify the expression completely.

Answer:

Daniel's errors are (a), (b) and (c)

Step-by-step explanation:

To do this, we only need to solve the expression on the left.

So, we have:

[tex]-2(-8x-4y+3/4)=[/tex]

Open bracket

[tex]-2(-8x-4y+3/4)=-2 * -8x -2 * -4y - 2 * 3/4[/tex]

[tex]-2(-8x-4y+3/4)=16x + 8y - \frac{2 * 3}{4}[/tex]

[tex]-2(-8x-4y+3/4)=16x + 8y - \frac{6}{4}[/tex]

[tex]-2(-8x-4y+3/4)=16x + 8y - 1\frac{1}{2}[/tex]

From the expression, we can see that:

So, Daniel's errors are (a), (b) and (c)

Answer:

Step-by-step explanation:

Here u go

Answer:Alkali metals - s block; one valence electron; lose one valence electron; charge of an ion +1

Step-by-step explanation:

Alkali metals have electronegativity from 0.7 to 1, lowest in Periodic table of elements, which means that alkali metals (I group in Periodic table) has positive oxidation number in compounds.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

For example, sodium (Na) is an element with atomic number 11 and it has one valence electron (3s¹) like all alkaline metals.

Electron configuration of sodium atom: ₁₁Na 1s² 2s² 2p⁶ 3s¹.

2) Alkaline earth metals - s block; two valence electrons; lose two electrons; charge of an ion is +2.

Beryllium, magnesium,calcium and strontium are alkaline earth metals. The elements have very similar properties. Alkaline earth metals have in common an outer s- electron shell (two electrons).

For example, atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.

Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²; calcium has two valence electrons (4s²).

3) Boron group - p block; three valence electrons; lose three electrons; charge of metal ions is +3; no nonmetals in this group; none.

For example, boron is an element with atomic number 5, which means it has 5 protons and 5 electrons, bcause atom has neutral charge.

Electron configuration of boron: ₅B: 1s² 2s² 2p¹, it has three valence electrons in 2s and 2p orbitals.

Atomic number is the number of protons, which is characteristic of a chemical element.

4) Carbon group - p block; four valence electrons; lose two or four electrons; charge of metal ions is +2 or +4; nonmetals gain four electrons; charge of nonmetals is -4.

Carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb) and flerovium (Fl) are in group 14 of Periodic table. They have same number of valence electrons (four) and similar chemical properties.

For example, carbon is a chemical element with symbol C and atomic number 6, which means it has 6 protons and six electrons. Valence electrons are in 2s and 2p orbitals.

Electron configuration of carbon atom: ₆C 1s² 2s² 2p².

5) Nitrogen group - p block;  five valence electrons; lose three or five electrons; charge of metal ions is +3 or +5; nonmetals gain three electrons; charge of nonmetals is -3.

Nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi) and moscovium (Mc) are in group 15 of Periodic table. They have same number of valence electrons (five).

For example, bizmuth (Bi) has atomic number 83, it has 83 protons and 83 electrons. Valence electrons are in 6s and 6p orbitals.

Electron configuration of bizmuth atom: ₈₃Bi [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³.

6) Oxygen group - p block;  six valence electrons; lose four or six electrons; charge of metal ions is +4 or +6; nonmetals gain two electrons; charge of nonmetals is -2.

Oxygen (O), sulfur (S), selenium (Se), tellurium (Te) and the radioactive element polonium (Po) are in group 16 of Periodic table. They have same number of valence electrons (six).

For example, electron configuration of oxygen atom: ₈O 1s² 2s² 2p⁴.  

Oxygen atom has six valence electrons (2s² 2p⁴), so it is in 16 group of Periodic table of elements.  

7) Halogens - p block; seven valence electrons; nonmetals gain one electron; charge of nonmetals is -1.

Halogen elements are in group 17: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I). They are very reactive and easily form many compounds.

Halogens need to gain one electron to have electron cofiguration like next to it noble gas.

For example, fluorine has 9 electrons and it gain easily one electron in chemical reaction to have electron configuration like noble gas neon (Ne) with 10 electrons.

Electron configuration of fluorine: ₉F 1s² 2s² 2p⁵.

8) Noble gases - p block; eight valence electrons (except helium with two valence electrons); do not gain or lose electrons; none.

Noble gases (group 18) are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.  

Noble gases have very stable electron configuration and does not need to gain electrons, only when they gain energy .

Helium has atomic number 2, it has 2 protons and 2 electrons.

Electron configuration of helium atom: ₂He 1s².

Electron configuration of krypton atom:  

₃₆Kr 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶.

Answer:

40

Step-by-step explanation:

You write down the %/100 = is/of 1st

So what you want to do is remove the percentage first and the place 150% And then place 60 on the "is" Numerator. And as u can see you do 100 * 60, that'll give you 600 and then the 150% is left alone, so you divide 600 and 150 And the answer is going to be 40

Hope this helps! Mark one of us as brainliest

Answer:

40

Step-by-step explanation:

x = 60 ×  100 /150

x= 40

Answer:

V= 270m³

Step-by-step explanation:

Answer:

4) B

5) B

6) A

Step-by-step explanation:

Answer:

4) no

5) 8x + 1.50

6) 1, 2, 0, 5

Step-by-step explanation:

4) no- first step is to subtract 10

5) number of apples times price of $8 plus a single purchase of $1.50

6) all values greater than -2

Answer:

1380 miles in 15 hours (92 mph).

Step-by-step explanation:

460/5 = 92.

92 mph.

92*15=1380

1380 miles in 15 hours

Answer:

1380 miles in 15 hours

Step-by-step explanation:

*Assuming the jet travel at a constant speed.

First, find the amount the jet flew in 1 hour. Divide 460 miles with 5 hours:

460/5 = 92

The jet travels 92 miles per hour.

Next, multiply 92 mph with 15 hours:

92 x 15 = 1380 miles

1380 miles in 15 hours is your answer.

Given:

The height of the swipe card in feet after t seconds is

[tex]h(t)=-3t^2+15t+18[/tex]

To find:

The maximum height of the swipe card and the time at which it reaches this height.

Solution:

We have,

[tex]h(t)=-3t^2+15t+18[/tex]

Here, leading coefficient is -3, which is negative. It means it is a downward parabola and the vertex of the downward parabola is the point of maximum.

If a quadratic function is [tex]f(x)=ax^2+bx+c[/tex], then the vertex is

[tex]Vertex=\left(-\dfrac{b}{2a},f(-\dfrac{b}{2a})\right)[/tex]

In the given function, we get

[tex]a=-3,b=15,c=18[/tex]

Now,

[tex]-\dfrac{b}{2a}=-\dfrac{15}{2(-3)}[/tex]

[tex]-\dfrac{b}{2a}=2.5[/tex]

Putting t=2.5 in the given function, we get

[tex]h(2.5)=-3(2.5)^2+15(2.5)+18[/tex]

[tex]h(2.5)=36.75[/tex]

So, the vertex of the given parabola is at (2.5,36.75).

Therefore, the maximum height of the swipe card is 36.75 feet and it reaches this height after 2.5 seconds.