7a = 28 Is a=21 a solution?

yes or no

Answers

Answer 1
No, because 7 x 21 is 147.
Answer 2

Answer:

No

Step-by-step explanation:

No because if a = 21, then 7 * 21 = 147 and 147 is not 28.


Related Questions

find the slope of the graph

Answers

Answer:

No image please add it on your next question.

In the week leading up to Christmas the galaxy shopping center gives away 6700 candy canes to first 83 children visiting the center each child gets same number of candy canes how maby candy canes does each child get round your answer to nearest tenth

Answers

Answer: 80.7

Step-by-step explanation:

From the question, we are informed that in the week leading up to Christmas the galaxy shopping center gives away 6700 candy canes to first 83 children that visits the center and that each child gets same number of candy canes.

If it's shared equally among the children, each child will get:

= 6700 / 83

= 80.7 to the nearest tenth.

What is the exact area of a regular hexagon with a side length of 8 cm? Enter your answer in the box. cm​

Answers

Answer:

A≈166.28cm²

Step-by-step explanation:

A=[tex]\frac{3\sqrt{3} }{2} a^{2} = \frac{3 x \sqrt{3} }{2} x 8^{2} = 166.27688cm^{2}[/tex]

what are the solutions to the expression x^2-8x=24

Answers

Answer: x= 2(2+sqrt(10)) , x=2(2-sqrt(10)

Step-by-step explanation:

x^2-8x=24 <- subtract 24 from both sides

x^2-8x-24 <- take quadratic formulat (-2+/- Sqrt(b^2 - 4ac)/2a

-(-8) +/- sqrt((-8)^2 - 4(1*-24) all over (2*1) <- simplify

(-(-8) +/- 4sqrt(10) )/2 <- sepereate

(-(-8) +/4sqrt(10) )/2 ,  (-(-8) - 4sqrt(10) )/2 <- simplify

2(2+sqrt(10)) , 2(2-sqrt(10) =x

Find the value of y.
120°

Answers

240 I'm pretty sure

cause the whole circle is 360 and the minor arc is 120 so subtract it

The four partners in a business decide to split the profits of their company in the ratio 2 : 3 : 3 : 5 .
If the profit one year is $26, 000, then what is the largest amount of profit received by one of the four partners?

Answers

Answer:

$10,000

Step-by-step explanation:

the profit was divided to 2+3+3+5=13 parts

the largest amount of profit

=$26,000×5/13

=$10,000

increase 140 in the ratio 7:5.​

Answers

Answer:

the answer is 196

Step-by-step explanation:

Answer:

i think that the correct answer might be 196

PLEASE HELP! NO LINKS!!What is the slope of the line in the graph?

Answers

i would say -1/2 not sure though

An unknown number y is 15 more than an unknown number x. The number y is also x less than 8. The equations to find x and y are shown below.

y = x + 15
y = −x + 8

Which of the following statements is a correct step to find x and y?

and could somebody please give me a step by step explanation

Answers

Since both equations equal y, you can combine them to x+15=-x+8
Next you need to move both variables to the same side so you can subtract x from both sides so it would be 15=-2x+8
Now you want to get the variable alone so you’d subtract the 8 from each side of the equation and you’d be left with 7=-2X
Lastly you one just one x so divide each side by -2 and you’d have 7/-2=x
x= -7/2 or -3.5

Let me know if you want further explanation of how I got x.

Answer:

x = −3.5

y = 11.5

Step-by-step explanation:

y = x + 15

y = −x + 8

[We know that y is 15 units more than x, and that −x is 8 units less than y. That can be combined into −x + 8 = x + 15 for the first variable (x), and for the second variable (y), y − 15 = −y + 8]

In order to solve this, solve for the first variable in one of the equations, then substitute the result into the other equation.

x = −[tex]\frac{7}{2}[/tex] = −3.5

y = [tex]\frac{23}{2}[/tex] = 11.5

Linda needs 6/9 cup of strawberries and 3/4 cup mashed peach for a recipe. She wants to find whether she needs more peaches or strawberries. How can you write 6/9 and 3/4 as a pair of fractions with a common denominator?

Answers

Answer: Smashed Peach i.e.  [tex]\dfrac{27}{36}[/tex]

Step-by-step explanation:

Given

Linda needs [tex]\frac{6}{9}[/tex] cup of strawberries

and [tex]\frac{3}{4}[/tex] cup of mashed peach for a recipe

For two fractions to have the same denominator, take L.C.M. of the denominator

[tex]\Rightarrow \text{L.C.M.(4,9)}=36[/tex]

[tex]\therefore \dfrac{6}{9}=\dfrac{6\times 4}{36}=\dfrac{24}{36}\\\\\Rightarrow \dfrac{3}{4}=\dfrac{3\times 7}{36}=\dfrac{27}{36}[/tex]

Therefore, she needs more mashed peach for the recipe.

Jose purchased 105 slices of pizza to sell at his school's fundraiser, yet at the end of the day, he had only sold 58. What is his percent of error?

Answers

Answer:

209 yan ang sagot brainliest po

Solve x + 20 = 24.
The solution is x =

Answers

Answer:

4

Step-by-step explanation:

24 - 20 = 4

It’s would be x=4 because 20+4=24

The drawing plan for an art studio shows a rectangle that is 19.2 inches by 8
inches. The scale in the plan is 4 in.: 5 ft. Find the length and width of the actual studio. Then find the area of the actual studio. The length is feet, the width is feet, and the area is square feet.

Answers

Answer:

24 ft by 10 ft

240 ft

Step-by-step explanation:

19.2/4 = 4.8

4.8 · 5 = 24

8/4 = 2

2 · 5 = 10

LOT OF POINTS
approximate the solutions to this system.

y = 3x2 + x − 6

y = x − 4

Round your answers to the nearest hundredth.

Answers

Answer:

[tex] \displaystyle ( x_{1},y_{1}) = (0.82, - 3.18) \\ ( x_{2},y_{2}) = ( - 0.82, - 4.82)[/tex]

Step-by-step explanation:

we are given a system of quadratic and linear equation

we want to figure out x and y

in other words the coordinates where the linear function intercept quadrilateral function

to do so

you can use substitution method

since y equals to both equation so substitute:

[tex] \displaystyle {3x}^{2} + x - 6 = x - 4[/tex]

move right hand side expression to left hand side and change its sign so there's only 0 left on the left hand side:

[tex] \displaystyle {3x}^{2} + x - 6 - x + 4= 0[/tex]

simplify addition:

[tex] \displaystyle {3x}^{2} -2=0[/tex]

add 2 to both sides:

[tex] \displaystyle {3x}^{2} = 2[/tex]

divide both sides by 3

[tex] \displaystyle \frac{ {3x}^{2} }{3} = \frac{2}{3} [/tex]

[tex] \displaystyle {x}^{2} = \frac{2}{3} [/tex]

square root both sides:

[tex] \displaystyle {x} = \sqrt{\frac{2}{3} } \\ x = \frac{ \sqrt{2} }{ \sqrt{3} } [/tex]

rationalise the denominator by multiplying √3/√3:

[tex] \displaystyle x = \pm\frac{ \sqrt{6} }{3} = \pm0.82[/tex]

now let's figure out y

substitute the value of x to the linear equation:

[tex]y = \pm0.82 - 4[/tex]

when positive

[tex]y = - 3.18[/tex]

when negative

[tex]y = - 4.82[/tex]

Answer:

(x1,y1) = (0.82, - 3.18)

(x2,y2) = (-0.82, -4.82)

Step-by-step explanation:

Plato gang

Someone help me please and no links!!!!! find the value of x

Answers

Answer:

x = 15

Step-by-step explanation:

37*2 = 74

360-74 = 286

286 = 2(9x + 8)

143 = 9x+8

135 = 9x

15 = x

5. Amaris buys a car for $12,000. Each year it decreases in
value by 5%. Write an equation to represent the value of the
car after t years.

Answers

Answer:

12,000-(0.05x)=t

Step-by-step explanation:

HELP! WILL MARK AS BRAINLIEST (MATHEMATICS FORM 1 // BASIC ALGEBRA) pls help me answer these 4 question TYSM!!!​

Answers

Answer:

hope this help you a lot but it's too late

can you mark me as brainlist

Un alumno multiplica un número por 32 en lugar de multiplicarlo por 23, obteniendo un producto mayor en 54 al producto original. Halla la suma de cifras del producto original

Answers

Answer:

La suma de cifras del producto original es igual a 12.

Step-by-step explanation:

De acuerdo a la información proporcionada, si multiplicas un número "x" por 32 su resultado sería igual al producto original "y" más 54 dado que dice que se obtiene un producto mayor en 54 al producto original, lo que se puede expresar de la siguiente forma:

32x=y+54

Además, se puede inferir a partir del enunciado que si el número x se hubiera multiplicado por 23 el resultado habría sido el producto original que lo denominamos como "y", por lo que puedes decir que:

y=23x

Ahora puedes reemplazar y=23x en 32x=y+54 y despejar x:

32x=23x+54

32x-23x=54

9x=54

x=54/9

x=6

Finalmente, puedes reemplazar el valor de x en y=23x:

y=23x

y=23*6

y=138

Suma de cifras: 1+3+8 = 12

De acuerdo a esto, la respuesta es que la suma de cifras es igual a 12.

Based on the results shown in the table, how many white marbles would one expect to draw in a total of 50 draws? (hint:set up a proportion)​

Answers

The answer to your question is 10

What is the answer to this question?

(3+√5)^2

Answers

Answer:

the answer to this is

14 + 6√5

14 + 6√5 because foil method

(3+√5)^2 = (3+√5)(3+√5)

3(3) = 9
3(√5) = 3√5
√5(3) = 3√5
√5(√5) = 5

9 + 3√5 + 3√5 + 5
= 14 + 6√5

Patrica has a bank balance of -$54 . if she deposit $100 what is her new Balance

Answers

Answer:

56 (positive, not negative)

Step-by-step explanation:

she will pay off the debt from the original amount she owed using part of the $100. With the debt being payed off , the remainder will be $56.

in other words ;

100+54= 56.

Henceforth , the number 56.

thank you!

Marlena has a cube with sides of 5 inches long that she wants to paint. How much paint will it take to cover the cube?
Determine whether this is surface area or volume(Don't need to solve solve, just want a complete sentence explaining your choice).

Answers

Answer: Volume because this is filling something in not covering something up.

Step-by-step explanation:

I need quick help. Ill try to give brainliest (since it depends on the amount of people that answer)

Answers

Answer:

The answer should be option B

A cylindrical gasoline storage tank has a diameter of 3.8 ft and a height of 10.9 ft.
What is the total surface area of the tank.

HELP PLZ !!! Extra points will be given !!!

Answers

41.42 u willllll be. Right

FREE PTS! Who is your favorite character? (can be fictional or a real person)​

Answers

Answer:

Yay!!!! Ty for the points!!!!!!!!!!!

I don't have a fav character....I luv BTS - they r real!!!

My mom, she’s a sweetie! So sweet :)

PLZ HELP AGAIN DUE TODAY ANSWER CHOICES ARE
A.140
B.188
C.132
D.104

Answers

A) I don’t know for sure but please let me know :)

Which two consecutive integers does -√138 lie between?
A:11 and 12
B:12 and 13
C:-11 and -12
D:-12 and -13

Answers

Answer:

C:-11 and -12

[tex] - \sqrt{138} \\ = - 11.747 \\ - 11 < x < - 12[/tex]

1. (1 point)
Determine the measure of 0 to the nearest degree.

a. 40°
b. 38°
C. 36°
d. 42°

Answers

I would say 36. Sorry if I'm mistaken
Brainliest would be nice

What is the mean of the data set? 17, 24, 26, 13 *
Mark only one oval.
4
13
20

Answers

Answer:20

Step-by-step explanation: 17+24+26+13=80

Divide by how many numbers there are. Answer: 20

Answer:

20

Step-by-step explanation:

Mean = Sum divided by the number of terms

(17+24+26+13)/4

(80)/4 = 20

Mean = 20

Alejandra drove from Michigan to Colorado to visit her friend. The speed limit on the highway is 70 miles/hour. If Alejandra’s combined driving time for the trip was 14 hours, how many miles did Alejandra drive?

Answers

Answer:

Alexandra drove 980 miles

Step-by-step explanation:

70×14=980

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