solve by substitution
y=-2x + 3
y=2x-1​

Answer:

distributive property

Step-by-step explanation:

A or 2 in this case is used to multiple each factor within the parenthesis

then jus combine like terms and solve for x

Step-by-step explanation:

Find the area of the whole backyard: 131 x 52 square feet

Find the area of the garden: 13 x 9 square feet

hope this helps :)

Answer:

13 times 9=117

131 times 52=6812

Step-by-step explanation:

maths x=139 times 95847576564 find x

Answer:

I got 0.87

If I got it wrong pls tell me the correct answer

Hey there!

In order to simplify this expression, we need to combine like terms.

Remember, like terms are terms from the same "family". not terms that you like. :)

So, the like terms here are

8x, 3x

and

-3y and -2y

Combine them:

8x-3x-3y-2y

Hence, the answer is

[tex]\boxed{\boxed{\bold{5x-5y}}}[/tex]

Hope everything is clear.

Let me know if you have any other questions; if you do, please comment.

#LearningIsAlwaysFun

#KeepLearning

[tex]\rule{200}{2}[/tex]

Answer:

emma: 6 toys, sally: 13 toys, james: 23 toys

Step-by-step explanation:

if emma had x toys, sally would have (x-3) toys. and we know that if james had 6 more toys, he would have the same amount as both girls combined. so in this case in terms of x, james would have (x+x-3-6) toys, after simplification we get 2x-9 toys..

since we know that the three of them have 52  nerf toys as total, we can set up the equation:

x= number of toys emma has

2x-9+x+x-3=52  

         4x-12=52

               x=16

emma has 16 toys, and sally has (16-3)=13 toys. finally, james has (2*16-9)=23 toys. 16+13+23=52

Answer:

79

Step-by-step explanation:

Sum of Triangle angles is 180

180 - 22 = 158

If the sides are the equal, the base angles are equal.

So, divide 158 by 2

79

Answer: 8

Step-by-step explanation:

In a 45-45-90 triangle, the hypotenuse is sqrt(2) times longer than the leg

Answer:

C. 19/4 Answer CORRECT

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The cost of one pineapple is £0.7.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Number of pineapples = 2

Amount given = £5

Amount returned = £3.60

The cost of the two pineapples.

= 5 - 3.60

= £1.40

The cost of one pineapple.

= 1.40/2

= 140/200

= 14/20

= £0.7

Thus,

The cost of one pineapple is £0.7.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ2

The probability of the spinner landing only once on yellow in two spins is 0.375. Then the correct option is C.

Probability means possibility. It deals with the occurrence of a random event. The value of probability can only be from 0 to 1. Its basic meaning is something is likely to happen. It is the ratio of the favorable event to the total number of events.

The total sample will be

Total sample = 16 {RR, BB, YY, GG, RB, BR, RY, YR, RG, GR, BY, YB, BG, GB, YG, GY}

The probability of the spinner landing only once on yellow in two spins will be

Favorable event = 6 {YR, RY, YG, GY, YB, BY}

Then probability will be

[tex]P = \dfrac{6}{16}\\\\P = 0.375[/tex]

More about the probability link is given below.

https://brainly.com/question/795909

Answer: c is correct

Step-by-step explanation:

Answer:

1. 9

2. 25

3. No (Explanation below)

Step-by-step explanation:

1. Original PT Formula is c=√a²+b²

BUT you're looking for the leg so you now have the formula of a=√c²-b² *c being the hypotenuse

a= √ 15² - 12²

a= √ 225 - 144

a= √81

a= 9

2. 16 + 9 = 25

* you're not looking for an angle therefore you are most likely looking for the length of the side. Simply add the AD and DC together to get the answer. If you were looking for an angle it'll be 180°.

3. NO because a right angle is an angle of exactly 90°, whether it be at a corner of a square/rectangle, a triangle, or where two perpendicular lines intersect. Angle ABC is an obtuse angle as it measures more than 90°

Answer:

x = 48

Step-by-step explanation:

[tex]\log_{10}(2x+4)=2[/tex]

[tex]\implies 10^{\log_{10}(2x+4)}=10^2[/tex]

[tex]\implies 2x+4=100[/tex]

[tex]\implies 2x=96[/tex]

[tex]\implies x=48[/tex]

Answer:

9 I believe if I did this right

Step-by-step explanation:

0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4 (Add)

=24

0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 6 (Add)

=33

33-24= 9

The difference = 9        *Sorry if I'm wrong*

Answer:

A.−2h

B.7j

C.ah

It's real simple

Brainly please

#2

Step-by-step explanation:

12+12+12+10+10=56

Perimeter=56 inches

Triangle Area=48

Square Area= 144

144+48=192 square inches

Hope this helps! :)

Answer:

Y= 200

Step-by-step explanation:

Just divide 30 by 0.15

Hope that helps!

Answer: y = 30/0.15

Step-by-step explanation:

First, convert 15% to a decimal by dividing by 100 to get 0.15. The word "of" in an equation means multiply, so the equation would be y*0.15 = 30. To isolate the variable you're trying to solve for, divide both sides by 0.15. The 0.15 on the left side of the equation cancels out, leaving you with a final equation of y = 30/0.15.

Answer:   [tex]\bold{\dfrac{4}{49}z^2-\dfrac{12}{35}xz+\dfrac{9}{25}x^2}[/tex]

Step-by-step explanation:

[tex]\bigg(\dfrac{2}{7}z-\dfrac{3}{5}x\bigg)\bigg(\dfrac{2}{7}z-\dfrac{3}{5}x\bigg)\\\\\\=\dfrac{2}{7}z\bigg(\dfrac{2}{7}z-\dfrac{3}{5}x\bigg)-\dfrac{3}{5}x\bigg(\dfrac{2}{7}z-\dfrac{3}{5}x\bigg)\\\\\\=\dfrac{4}{49}z^2-\dfrac{6}{35}xz-\dfrac{6}{35}xz+\dfrac{9}{25}x^2\\\\\\=\dfrac{4}{49}z^2-\dfrac{12}{35}xz+\dfrac{9}{25}x^2[/tex]

The number of times the hydrogen ion concentration of Aeen’s drink is the hydrogen ion concentration of Marien’s drink is 4 approx.

The phrase "times bigger" shows this:

If a number 'x' is 't' times bigger than 'y', then that means:

[tex]x = t \times y[/tex]

It is because 'y' had to multiply itself with 't' to get in equal level of 'x'

A solution with 'x' as its pH contains [tex]10^{-x} mol/L[/tex] of hydrogen ions.

For the considered case, we have:

Thus, its hydrogen ion concentration is [tex]10^{-2.7}[/tex] = x (say)

Thus, its hydrogen ion concentration is [tex]10^{-3.3}[/tex] = y (say)

Then, let x is t times bigger than y, then that means:

[tex]x = t\times y\\\\t = \dfrac{x}{y} = \dfrac{10^{-2.7}}{10^{-3.3}} = 10^{-2.7 - (-3.3)} = 10^{-0.6} \approx 4[/tex]

It is because of the property [tex]a^b \times a^c = a^{b+c}[/tex]

Thus, hydrogen ion concentration of Marien's drink is approx 4 times the hydrogen ion concentration of Aeen's drink.

Learn more about hydrogen ion concentration here:

https://brainly.com/question/3072484

Answer:

1

Step-by-step explanation:

Answer:

254.34 miles²

Step-by-step explanation:

How do we find the area of a circle?

Solving

Therefore, the area is 254.34 miles².

Have a lovely rest of your day/night, and good luck with your assignments! ♡

Answer:

Formula for area of a circle:

πr^2,

where pi is equal to 22/7 or 3.14

and r is the radius that is being squared

Plug in the actual values to this formula to find the area;

a = πr^2

a = 3.14 x 9^2

a = 3.14 x 81

a = 254.34, your answer is 254.34 square miles.

Answer:

7^1/3

Step-by-step explanation:

the answer is 7 to the exponent of 1/3

Answer:

Step-by-step explanation:

Edward drew the following cards: 3, -3, -4, 5, 10, -7

He follows the steps:

Positive 4 means 4 steps ahead

Correct option is B)

Answer:

[tex] \bf \longrightarrow \: 2 {x}^{3} + 4 {x}^{2} + x[/tex]

Taking x common

[tex] \sf \longrightarrow \: x \bigg(2 {x}^{2} + 4x + 1 \bigg)[/tex]

Therefore,

Answer:

A. x (2x*2 + 4x + 1)

Step-by-step explanation:

Given:

The function f(x) describes the amount of money, in dollars, the club will earn for wrapping x presents.

[tex]f(x)=3x[/tex]

To find:

The f(658).

Solution:

We have,

[tex]f(x)=3x[/tex]

Substitute x=658 to find the value of f(658).

[tex]f(658)=3(658)[/tex]

[tex]f(658)=1974[/tex]

It means, the club will earn $1974 for wrapping 658 presents.

Therefore, [tex]f(658)=1974[/tex].

Answer:

From November to March, the temperature in Alaska is between 0°F/-18°C and -30°F/-35°C, which is very cold. May and September are both often the driest and the wettest months in Alaska's summer.

I hope this helps you

:)

Answer:

Step-by-step explanation:

Opposite angles of a rhombus are congruent, and adjacent angles of a rhombus are supplementary.