plz answer. Its urgent. thanks​

Plz Answer. Its Urgent. Thanks

Answers

Answer 1

Answer:

[tex] a = \dfrac{5}{18} [/tex]

[tex]b = -\dfrac{1}{18}[/tex]

Step-by-step explanation:

You need to rationalize the fraction.

[tex] \dfrac{1}{5 + \sqrt{7}} = a + b\sqrt{7} [/tex]

[tex] \dfrac{1}{5 + \sqrt{7}} \times \dfrac{5 - \sqrt{7}}{5 - \sqrt{7}} = a + b\sqrt{7} [/tex]

[tex] \dfrac{5 - \sqrt{7}}{25 - 7} = a + b\sqrt{7} [/tex]

[tex] \dfrac{5 - \sqrt{7}}{18} = a + b\sqrt{7} [/tex]

[tex] \dfrac{5}{18} - \dfrac{1}{18}\sqrt{7} = a + b\sqrt{7} [/tex]

[tex] a = \dfrac{5}{18} [/tex]

[tex]b = -\dfrac{1}{18}[/tex]


Related Questions

how do you find the x-intercept and y-intercept of an exponential function by looking at a graph

Answers

Answer:

You can find the x-intercept and y-intercept by looking at the origin (0,0). There you will see x and y point at zero.

Step-by-step explanation:

Hope this Helped

Help me please, its timed

Answers

Sry there is no answer well actually the answer has an infinite amount of answers but you can't just pick one and say that's that and this is with all of them... sorry

Helpp I’ll mark you brainlist

Answers

9514 1404 393

Answer:

  an = n + 1

Step-by-step explanation:

This arithmetic sequence has a first term of 2 and a common difference of ...

  3 - 2 = 1

The general term is ...

  an = a1 + d(n-1)

Using a1=2 and d=1, this is ...

  an = 2 +1(n -1)

  an = 2 + n - 1 . . . . . eliminate parentheses

  an = n + 1 . . . . . . . .collect terms

What is the equation of the line in y=mx+b format? BRAINLIST WILL BE REWARDED

Answers

Answer:

y = 2/5x - 1

Step-by-step explanation:

There are a couple of different ways to figure this out, but since you have a graph, the fastest way is to count the slope, or m in the formula, by counting the rise (units up) over run (units to the right), which is 2/5. Then, find the value of b by finding the y-intercept on the graph, or -1.

ÜSLÜ SAYILAR
MATEMATIK
343 Bir ton atik kait geri dönOstogonde 16
ağacı kurtarır.
Buna göre 2 ton atik kağıdın geri dönüşüm
sağlandığında kaç tane agaç kurtanımış olur?



acil lazım​

Answers

cant understand your language can you translate in English

finding the distance between two points (-4,-3),(6,1)​

Answers

Answer:

√16 or 10.77033

Step-by-step explanation:

distance formula

Sketch the graph of each linear inequality

Answers

Answer:

Step-by-step explanation:

In an inequality, sign of greater than or less than decides that the graph of the line will be a dotted line.

And sign of greater than means area above the dotted line.

Table for input output values,

x          -4           0            4           6          

y          -3          -4           -5        -5.5

Plot these points and join them by a dotted line.

Now we shade the area above the dotted line to show the solution area of the inequality.

Draw the graph of the equation x − y = 4
Answer the following using graph paper:
(i) Find the value of y, if x = 7 from the graph.
(ii) Write the coordinate of the point where the graph intersect on x − axis.

Answers

Answer:

We have the equation:

x - y = 4

We can write this as a linear equation in the slope-intercept form if we isolate the variable y.

We get:

y = x - 4

Now to graph this function, we need to evaluate x in two different points and get two points (x, y) of the line.

If we use x = 1 and x = 2, then we get:

y(1) = 1 - 4 = - 3

Then we have the point (1, -3)

and:

y(2) = 2 - 4 = - 2

Then we have the point (2, - 4)

Now we need to draw these two points in the coordinate axis, and draw a line that connects the points, the example can be seen in the image below.

a) To use the graph, we need to locate the value x= 7 in the x-axis.

Then draw a vertical line

In the point where the vertical line intersects the graph, we draw an horizontal line.

The y-value will be the value at which this horizontal line intersects the y-axis

In this case, is at  y = 3.

Then when x = 7, y = 3.

(you can see it in the graph)

ii) The coordinate at which the graph intersects the x-axis can be seen in the graph, it is the point (0, 4)

A thunderstorm travels at a constant speed. In 15 minutes , the storm travels 12 miles. If the storm continues to travel at the same rate, how far would it travel in 90 minutes?

Answers

Answer: 72 Miles In 90 Minutes

Step-by-step explanation: First, you have to divide both 15 & 12 by 15, (which represents minutes), and you get 1 over 0.8. Next, you multiply 1 over 0.8 times 90, which gibes you 90/72. There is your answer! I hope that you found this helpful.

Here is the equation below:

15/12 divided by 15/15 = 1/0.8 x 90/90 = 90 MINUTES/72MILES

please help!!! .> ^ <.`

Answers

Answer:

no idea so sorry

Step-by-step explanation:

A box of cereal costs $3.69. The box has 13.7 ounces of cereal. About how much does each ounce cost?

Answers

Answer:

HELP ME W MY PROBLEMS ASAP PLSSSS

Step-by-step explanation:

Pierce bought 16 ounces of motor oil for $2.24. How much is motor oil per ounce?

Answers

Answer:

$0.14

Step-by-step explanation:

Answer:

0.14

Step-by-step explanation:

2.24÷16=0.14

Can anybody help me on these 2 problems.

Answers

Answer:

15. 1800

16. 18759

Step-by-step explanation:

216 * 5 = (200 + 10 + 6) * 5 = 200 * 5 + 10 * 5 + 6 *5 = 1000 + 50 +30 = 1800

6,253 * 3 = (6000 + 200 + 50 + 3) * 3 = 18000 + 600 + 150 +9 = 18600 + 150 +9 = 18750 + 9 = 18759

Can you simply these fractions?

Answers

Answer:

[tex] \frac{1}{5 } = \frac{3}{8} = \frac{3}{5} = \frac{3}{4} = \frac{3}{7} = \frac{1}{9} = \frac{4}{5} = \frac{5}{6} = \frac{2}{3} = \frac{1}{10} [/tex]

Answer:

4/20= 1/5

9/24= 3/6

18/30= 3/5

5/45= 1/9

20/25= 4/5

10/12= 5/6

6/9= 2/3

4/40= 1/10

Step-by-step explanation:

What i did was use different numbers to divide them with the numerator and denominator.  

mrs patrick is employed by a clothing store.She recieves a 6% commission plus a small sallary. Last week she sold $8419 in clothing how much commission did mrs patrick receive

this is a story problem btw :)

Answers

Answer:

$505.40

Step-by-step explanation:

now wheres the answer to my question?

Answer:

630.babycrazy

Step-by-step explanation:

hmu on ig

Answer 1. And 2.for Brainliest

Answers

Answer:

Step-by-step explanation:

10% discount means you pay 90% of the original cost x.

90% of x = $40.50

0.90x = $40.50

x = $40.50/0.90 = $45

:::::

total cost = 1.065·$40.50 ≅ $43.13

In a video game, a guppy that escapes a net turns into three goldfish. Each goldfish can turn into two betta fish. Each betta fish can turn into two angelfish. Complete the diagram and write the number of fish at each stage. Write and evaluate an expression for the number of angelfish that can be formed from one guppy

Answers

Answer: 1 guppy = 3 goldfish

1 goldfish = 2 betta fish.....so 3 goldfish = (3 * 2) = 6 betta fish

1 betta fish = 2 angel fish....so 6 beta fish = (6 * 2) = 12 angel fish

so the number of angelfish that can be formed by 1 guppy is 12 angelfish

PLS HELP WILL GIVE BRAINLIEST!! Identify this set of lines as parallel, perpendicular, or neither.

Answers

Answer:

It will be neither. Also, thanks for the points friend

Step-by-step explanation:

Answer:

The answer is neither.

Step-by-step explanation:

As an estimate we are told 5miles is 8km convert 68 km to miles ?

Answers

Answer:

42.5miles

Step-by-step explanation:

68÷8= 8.5

8.5×5= 42.5 miles

we use the numbers given to us because we are finding the estimate.

our estimate is correct because 68km= 42.3 miles

Answer:

The exact answer is 42.25 miles

Step-by-step explanation:

divide 68 by 8 and get 8.5. Multiply 8.5 by the 5 so you get 42.5. Which is a super close estimate.

PLEASE HELP I WILL GIVE BRAINLIEST FIND THE SURFACE AREA​

Answers

Answer:

205.28

Step-by-step explanation:

See the screenshot provided for full steps and solution.

Find the exact area of ABC

Answers

Answer:

A = 18[tex]\sqrt{3}[/tex] sq meters

Step-by-step explanation:

find BD, can use altitute rule:

3 / BD = BD / 9

BD² = 27

BD = [tex]\sqrt{27}[/tex] = 3[tex]\sqrt{3}[/tex]

Area of ΔABC = 1/2 · (3+9) · 3[tex]\sqrt{3}[/tex]

A = 6 · 3[tex]\sqrt{3}[/tex]

Jonah calculates that the perimeter of the rectangle below is 6 1/4x - 3. Explain his error and include the correct expression.

Answers

Answer:

Jonah left out the other two sides!

.............................

Answers

Answer:

1 inch = 40 miles

Step-by-step explanation:

140 ÷ 3.5 = 40

Pleaseee helppp answer correctly !!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!

Answers

Answer:

first you add all the sides up and then subtract the perimeter with all the added up sides u will get ur answer

I’m sooo confused rn please help pleaseeeeeee

Answers

Answer:

i believe the answer is c

Step-by-step explanation:

i'm not entirely sure but i hope this helps :)

have a nice day !!

**please let me know if this was wrong**

 

Answer:

B & C

Step-by-step explanation:

you have to solve for x in both a negative and positive way

HELP PLEASE
A farmer has decided to divide his land area in half in order to plant soy and corn. Calculate the area of the entire area so he knows how much soil is needed.


Each bag of soil covers 40 square yards. How many bags should the farmer purchase?

1 bag
2 bags
3 bags
4 bags

Answers

i think 2 bags or 1 bags hope it helps

The area of the farmer's land is 54 square yards and number of bags needed is 2. The correct option is (B).

What is a triangle?

A triangle is a two dimensional shape bound by three sides. The sum of the interior angles of a triangle is 180°. The longest side of a triangle is always less than the sum of other two sides.

For the given diagram, the following data is given as,

Base of the upper and lower triangle is 6.5 + 2.5 = 9 yards.

And, the height is given as 6 yards.

Now, the area of the land can be given as,

Area of upper triangle + Area of lower triangle

⇒ 1/2 × 9 × 6 +  1/2 × 9 × 6

⇒ 54 square yards.

As per the question, the area of the land is more than the soil contained in 1 bag.

Which implies the number of bags required is given as 2.

Hence, the area of land and number of bags required is obtained as  54 square yards and 2 respectively.

To know more about triangle click on,

https://brainly.com/question/2773823

#SPJ2

Which triangles are similar?

Answers

Answer:

c

Step-by-step explanation:

Need help with this one please!!!!

Answers

Step-by-step explanation:

you have a quand app

not have means download

quand app on open and photos this one and come answer

Help I need to submit this ASAP​

Answers

Answer:  th

Step-by-step explanation:

Given x || y.

∠1 and ∠5 are _______ angles.
complementary
corresponding
supplementary
vertical

Answers

Angles 5 and 1 are corresponding angles because the line intersects two parallel lines
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