7(5x + 7) = 399 can someone tell me what is x with steps please and thank you

Answers

Answer 1

Answer:

x = 10

Step-by-step explanation:

[tex]7(5x+7)=399\\\\35x+49=399\\\\35x+49-49=399-49\\\\35x=350\\\\\frac{35x=350}{35}\\\\ \boxed{x=10}[/tex]

Hope this helps.


Related Questions

pls hurry will give brainlyest or whatever !!!

Which coordinate rule matches this description? Dilation of original by 5.

(5x, y)

(x+5, y+5)

(5x, 5y)

(x, 5y)

Answers

Answer:

D  (x,5y)

Step-by-step explanation:

Using the dimensions shown, you could create a rectangular prism. Caculate the surface area for the rectangular prism. A 30m2 b 56m2 c 60m2 d 112m2

Answers

Answer:

550ft²

Step-by-step explanation:

Since we are not given the dimension of the rectangular prism. Let us assume;

Length of the rectangular base L = 10ft

Width of the rectangular base W = 15ft

height of the prism H = 5ft

Total surface area of the prism = 2(LW + WH + LH)

Substitute the given values

Total surface area of the prism = 2{10*15 + 15*5 + 10*5}

Total surface area of the prism = 2(150+75+50)

Total surface area of the prism = 2(275)

Total surface area of the prism = 550ft²

I WILL GIVE BRAINLIEST!!!

Answers

#1 or A because i have done this  ed. 2020

Answer:

Here is your answer.......................................

Step-by-step explanation:

Need help with Geometry please, angles.

Answers

Answer:

ΔDEF

Step-by-step explanation:

T ↔ D     S ↔ E      R ↔ F

ΔTSR is similar to ΔDEF

Which matrix represents the vertices of the rectangle after it is scaled by a factor of 3?
0 0 120
12 12 6 0
(4,4)
(0, 2)
To 12 12 67
0 12 12 6
(0,0)
(40)
To 12 12 0
0 0 12 6
DONE

Answers

the awnser is C I just got it right

What is the GCF of 8a^2 and 11?

Answers

Answer:

The only common factor would be 1 only.

Step-by-step explanation:

If you don't believe me, then you might as well calculate yourself or find the gcf or lcm

What angle is paired with angle D as an alternate interior angle?

Answers

Answer:

E

Step-by-step explanation:

i dont know at this point

Answer:

angle E

Step-by-step explanation:

Hello There!

We need to find an angle that is a pair with angle D and they have to be alternate interior angles

alternate interior angle properties:

On the inside of the parallel linescongruent

In the image below; represents a pair of alternate interior angles

These properties match angle D with angle E

Why? they are both on the inside of the parallels

They also happen to be congruent

2+2-4×3+1÷2×8
REPOSTING THE PICTURE FROM MY LAST QUESTION​

Answers

The correct answer is -4

If two circles are externally tangent, it is not possible to draw an external tangent line. True/False

Answers

Answer:

I think its true

Step-by-step explanation:

Answer:

False

there is one tangent line that passes between the two circles, touching each at the point of tangency

Can you guys pleas help me Find the answer to 523÷32 .

Answers

Answer:

16.34375

Step-by-step explanation:

Answer: 16.34 but if rounded16.30

Step-by-step explanation:

What are the odds that the spinner lands on red or the number 4?
4
4
2
33

Answers

Answer:

5 to 3

Step-by-step explanation:

The desired outcomes are 4 or red.

Here are all the possible outcomes:

1 red

1 red

1 red

2 green

3 blue

3 blue

4 yellow

4 yellow

The desired outcomes are in boldface. There are 5 desired outcomes.

There are 3 outcomes that are not desired.

odds of 4 or red = 5 to 3

Answer:

5/8

Step-by-step explanation:

Write a decimal and a fraction for the shaded part of the diagram.

A. 0.60; 160/100

B. 0.63; 163/100

C. 1.60; 160/100

D. 1.63; 1 63/100

Answers

The correct answer is
D. 1.63; 1 63/100
D. 1.63; 163/100 hope this helps

Y is inversely proportional to cube root of x. what x= 1/8y=2 find the constant of proportional​

Answers

Answer:

1/2

Step-by-step explanation:

[tex]y = \sqrt[3]{\frac{1}{8x}}\\\\=\sqrt[3]{\frac{1}{2*2*2*x}}\\\\=\frac{1}{2}\sqrt[3]{\frac{1}{x}}[/tex]

Constant of proportional= 1/2

Addison is shooting a free throw. The initial height of the ball is represented by the____
A. x-intercept
B. y-intercept
C. zeros
D. vertex

Answers

9514 1404 393

Answer:

  B.  y-intercept

Step-by-step explanation:

If we assume that the graph of the free-throw is of height versus time, then the initial height is the y-intercept—when time = 0.

The proportion of red marbles to blue marbles in a jar is 3 to 8. If there are 56 blue marbles in the jar, how many red marbles are there?

Answers

Answer:

21

Step-by-step explanation:

3:8

8x7 = 56

3x7 = 21

The sales tax on a $30 purchase was
$2.40. What was the sales tax rate?

Answers

Answer:

8 percent

Step-by-step explanation:

2.4/30 = 0.08 or 8%


A circle has a diameter of 32 units. What is the area of the circle to the nearest hundredth of a square


Answers

Answer:

804.25 units²

Step-by-step explanation:

radius = diameter / 2

Area of a circle = πr²

radius = 32/2 = 16 cm

Area = (16)²π

Area = 256π = 804.247719

Area ≈ 804.25 units²

the volume of a cube is 2,197 cubic feet. what is the length of each side of the cube?
(pls give an explanation)

Answers

Answer:

13

Step-by-step explanation:

Since all the sides of a cube are equal, one single side will be the cube root of the volume i.e,2197 to give me 13

A pot holds 324 milliliters of water. How many liters will 19 pots hold? (2 points) 6.156 liters 6,156 liters 61.56 liters 615.6 liters

Answers

Answer:

the pot needs now 214 milleters of water

Step-by-step explanation:

solve for x in the triangle. round to the nearest tenth

Answers

Answer:

x= 6.3

Step-by-step explanation:

sinx= opp/hyp

sin23° = x/16

x= sin23° * 16

x= 6.25 -> 6.3

Step-by-step explanation:

you can use this formula and find the answer

ac square = ab square + bc square

Solve the equation -7y + 4 =60 *
Pls, help me answer this.

Answers

Answer: -8
Here’s why: you start by subtracting the 4 from both sides. Leaving you with
-7y= 56
Divide by -7 on both sides
-7y/-7 = y 56/-7=-8
I think the answer is -8 sorry if I’m wrong

Two families go to a zoo.
The Smith family of two adults and three children pay £61.
The Jones family of three adults and five children pay £96.
Work out the cost of an adult ticket and the cost of a child ticket.

Answers

Answer:

The adult tickets cost £17.00 and child tickets cost £9.00

Step-by-step explanation:

2a + 3c = 61

2a = 61 - 3c

a = 30.5 - 1.5c

3(30.5 - 1.5c) + 5c = 96

91.5 - 4.5c + 5c = 96

91.5 + 0.5c = 96

0.5c = 4.5

c = 9

a = 30.5 - 1.5c

a = 17

The adult tickets cost £17.00 and child tickets cost £9.00


Question 9: What does x equal?

Answers

26

Step-by-step explanation:

3x + 2x = 50 = 180

5x = 130

x = 26

In algebra, x will equal 2

3x + 8 = 3x+
What value could you write in after 3x that would make the equation true for:
no values of x?

Answers

Answer:

any number except 8

Step-by-step explanation:

Suppose you have a 7-cm by 5-cm rectangle. You increase the length by 1 cm and decrease the width by 1 cm. You continue to do this. What happens to the perimeter of the rectangle? The area? Explain why this happens.

Answers

Answer:

Step-by-step explanation:

P of original = 14 + 10 = 24

P of original l + 1  and w - 1 = 16 + 8 = 24

P of original l + 2  and w - 2 = 18 + 6 = 24

The perimeter remains the same each time since Perimeter is to the 1st power and you are summing; by subtracting from one and adding the same amount to another measure there is no change in perimeter

A of original = 7 x 5 = 35

A of original l + 1  and w - 1 = 8 x 4 = 32

A of original l + 2  and w - 2 = 9 x 3 = 27

A of original l + 3  and w - 3 = 10 x 2 = 20

A of original l + 4  and w - 4 = 11 x 1 = 11

The area decreases by 3,5,7,9 units each time since Area is to the 2nd power since you are multiplying two measures, now if you take the 2nd differences of 3,5,7,9 you see that they are 2 units apart each time, so are is squared and the 2nd differences are constant

A table of values of a linear function is shown below.

Find the slope and y-intercept of the function's graph, and find the equation for the function.

Answers

Answer:

slope: 1/2

y int: 1

equation: y=1/2x + 1

Step-by-step explanation:

first you look at the graph and see how many times the table goes up by, the y goes up by 2 and the x goes up by 1 and since it is rise over run (x being run and y being rise) your slope is 1/2.

The y intercept is easy, you always start at 0 and see where the y starts with the 0 and since the 1 is underneath the 0 your y intercept is 1.

The equation is simple add al your parts together. Your slope (make sure to put an x right next to it) and your y intercept: ex. y=3x + 2

Use the simple interest formula to find the interest earned and the ending balance. I = Prt (please show work)


1. $9,000 at 4% for 2 years

Answers

Answer:

720

Step-by-step explanation:

I = Prt

I = (9000)(0.04)(2)

I = 720

Someone help me with this

Answers

Answer:

And it was not the first time that a lot of the people to a new report by a single limited few single few group an

Step-by-step explanation:

I have been using the address of the most important thing to remember is that you have the right to be able to use the same time as I thing

What is
Mean
Medium
And Mode

Answers

Answer:

mean is the average value in the list.

first you add all number, then divide that value by the total number in the list

lets say (2,3,4,5)

you add 2+3+4+5 = 15 / 4

4 is the count

you'll get the average.

medium is the middle value in the list, but you should list from least to greatest

mode is repeated value in the list

Answer:

Step-by-step explanation:

The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the list of numbers.

The median is the value separating the higher half of a data sample, a population, or a probability distribution, from the lower half. In simple terms, it may be thought of as the "middle" value of a data set. For example, in the data set {1, 3, 3, 6, 7, 8, 9}, the median is 6, the fourth number in the sample. The median is a commonly used measure of the properties of a data set in statistics and probability theory.

The mode is the value that appears most often in a set of data. The mode of a discrete probability distribution is the value x at which its probability mass function takes its maximum value. In other words, it is the value that is most likely to be sampled.

Please please help please please ASAP please I'm begging you please I have 10 minutes please y'all help please any ACE that can help please

Answers

Answer:

3

Step-by-step explanation:

The two quads are of similar, and we know that they are of ratio 1:2, thus

3y+5/7 = 2

y = 3

Answer:

y = 3

Step-by-step explanation:

The figures are similar so the ratios of corresponding sides are equal, that is

[tex]\frac{UR}{DA}[/tex] = [tex]\frac{TS}{CB}[/tex] , substitute values

[tex]\frac{4}{2}[/tex] = [tex]\frac{3y+5}{7}[/tex] ( cross- multiply )

2(3y + 5) = 28 ( divide both sides by 2 )

3y + 5 = 14 ( subtract 5 from both sides )

3y = 9 ( divide both sides by 3 )

y = 3

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