PLEASE HELP
Lateena solved the equation below. Is her solution correct? Explain why or why not.
Answers
Answer:
it isn't correct
[tex]x {}^{2} - 6x - 7 = 0 \\ d = 36 + 28 = 64 \\ x1 = \frac{6 - 8}{2} = - 1 \\ x2 = \frac{6 + 8}{2} = 7[/tex]
Answer:
her solution isn't correct .
because she had done a slight mistake in her calculation.
i.e.
[tex]\sqrt{16}=4 \:\:not \:\:16[/tex]
Step-by-step explanation:
solution given:
x²-6x-7=0
making it a perfect square
we must make it on the form of (a+b)²or(a-b)²
so
x²-2*3*x+3²-3²-7=0
(x-3)²-9-7=0
(x-3)²-16=0
adding 16 on both aide
(x-3)²=16
doing square root on both side
[tex]\sqrt{(x-3)²}=\sqrt{16}[/tex]
x-3=±4
taking positive
x-3=4
adding 3 on both side
x=7
and.
taking negative
x-3=-4
adding 3 on both side
x=-4+3
x=-1
x=-1 or 7
Related Questions
I NEED HELP ON THIS QUESTION
Answers
Step-by-step explanation:
b=4, so
7²+4²=c²
49+16=c²
65=c²
Sq root both sides
8.06=c
I NEED HELP ASAP
In the figure, the dashed line divides the arrow in half. What is the total area of the arrow? 2 cm 5 cm 4 cm 20 cm 17 cm 2 cm
Answers
Answer: 80 square centimeters
mark me brainlist pls
Step-by-step explanation:
what is the mean absolute deviation for this set 65 95 85 70 70 95 55
Answers
Answer:
Step-by-step explanation:
The M.A.D is 12.24, also u meant to put the first 95 as a 90 lol.
Answer:
The M.A.D is 12.24
Step-by-step explanation:
HELP ASAPPPPPPP FASTTT
Answers
Answer:
∠ FEG = 50°
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
110° is an exterior angle of the triangle, then
5x + 6x = 110
11x = 110 ( divide both sides by 11 )
x = 10
Then
∠ FEG = 5x = 5(10) = 50°
Megan and Devon are working together in science class to build a terrarium for an herb garden. The plan for the terrarium, with some dimensions in centimeters (cm), is shown here. What is the volume of the terrarium?
Answers
Answer:
48,000,000
Step-by-step explanation:
just multiply them all
Additive inverse of 400
Answers
Given:
A number is 400.
To find:
The additive inverse of 400.
Solution:
We know that the sum of a number and its additive inverse is 0.
If "a" is number and "b" is its additive inverse, then
[tex]a+b=0[/tex]
Let x be the additive inverse of 400. Then,
[tex]400+x=0[/tex]
Subtract both sides by 400.
[tex]400+x-400=0-400[/tex]
[tex]x=-400[/tex]
Therefore, the additive inverse of 400 is [tex]-400[/tex].
Rewrite 10/50 fraction in the simplest form.[tex]\frac{x}{y}[/tex]
Answers
Answer:
1/5
Step-by-step explanation:
divide both numerator and denominator by 10, with equals to 1/5
Answer:
1/5
Step-by-step explanation:
find the gcf of each which is ten and divide each number by that, you'll get 1/5.
If that doesn't make sense try this:
If both the numbers are even, 2 can go into each do start dividing each by that like this:
10/50 ---> 5/25 Now we see that 5 can go into both of these numbers to make 1/5
PLEASE HELP! what is the area of this figure
Answers
Answer:
48 sq ft
Step-by-step explanation:
Move the triangle at the left of the parallelogram to the vacant dotted area. The problem is now 6 ft by 8 ft.
6 * 8
=48
131° 1079
47°
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XE
Enter the number that goes in the green box.
[?]
Enter
Answers
Answer:
x=75
Step-by-step explanation:
Sum of the interior angles of a trapezoid = 360°
That being said we can calculate the measure of the missing angle (x) by subtracting the given angles (131, 107 and 47) from 360
so x = 360 - 131 - 107 - 47
360 - 131 = 229
229 - 107 = 122
122 - 47 = 75
so x = 75
can some one answer my question i put up plz and ill mark you the b and give you 50 points
Answers
Answer:
what is your question
Step-by-step explanation:
math is bad help me lol-
Answers
Answer:
C
Step-by-step explanation:
The line rises up 8, and the run is 2, 8/2=4.
Kelly buys 4 7··8 pounds of apples and 2 3··8 pounds of oranges. How many pounds of fruit does she buy altogether? Show Your work
Answers
Answer:
7 1/4 pounds
[tex]4\frac{7}{8} + 2\frac{3}{8}[/tex]
[tex]6\frac{7 + 3}{8}[/tex]
= [tex]6\frac{10}{8}[/tex]
convert the improper fraction to a mixed fraction
10/8 = 1 2/8 = 1 1/4
Add the 1 1/4 to 6 = 7 1/4
Step-by-step explanation:
Kelly buys 4 7/8 pounds of apples and 2 3/8 pounds of oranges. How many pounds of fruit does she buy altogether? Show Your work
6. A study recorded the number of baskets scored each game by four basketball players. The MAD from this data is shown below. Which basketball player is the most predictable regarding his/her number of baskets per game?
MAD. Basketball Player Donelle. 1.4
Mila. 3.8
Aracely. 2.5
Corey. 1.2
A. Donelle
B. Mila
C. Aracely
D. Corey
Answers
Answer:
D. Corey!
Step-by-step explanation:
I hope this helps! Have a great rest of your day!
Six more than 5 times a number x is greater than or equal to 31.
Answers
Answer:
x ≥ = 5
Step-by-step explanation:
5x + 6 ≥ = 31
5x ≥ = 25
x ≥ = 5
Which is the approximate value of x? 4 9 17 20
Answers
Answer: it’s d. 20 .
PLEASE HELP!! - MULTIPLE CHOICE - 10 POINTS - YOU WILL GET BRAINLIST - MATH
Answers
Answer:
no picture srry man
Step-by-step explanation:
Answer:
48
Step-by-step explanation:
First, you can see that it's a right angle. so 90 - 42 is 48.
measure of angle C is 48
Luis Huerto has a limited payment insurance policy until age 65. His annua
premium is $875. He wants to pay the premium monthly. The monthly
premium is 8.4% of the annual premium. What are his monthly payments?
$73.50
$70.98
$56.11
$69.75
Answers
8.4% of the annual premium $875 come out to $73.50 a month
Answer:
$73.50
Step-by-step explanation:
875*0.084=73.5
Use the quadratic formula to find both solutions to the quadratic equation
given below.
4x2 + 3x -1 = 0
Answers
Answer:
do u mean 4x²........i need to make sure it
A recipe calls for 6.67 cups of sugar, but Jake only has 1.8 cups. How much
more sugar does Jake need?
4.87 cups
5.27 cups
8.47 cups
5.59 cups
Answers
Answer:
Jake need 5.59 cup of sugar
I hope you like itCan anyone help me with this please
No links or I’ll report it .
I’ll mark you as a brainliest.
Answers
Answer:
220 in²
Step-by-step explanation:
1) use a² + b² = c² to find the missing side length by substituting b with 11 and c with 61 ----- a² + (11)² = (61)²
2) this gets a² + 121 = 3721 after squaring 11 and 61
3) subtract both sides by 121 to try isolating the variable which gets a² = 3600
4) find the square root of 3600 to get the value of a, or the missing side which is 60 in
5) since there are three triangles, divide 60 by 3 which has 20 as the length of each small triangle
6) multiply 20 and 11 to get the area of the each small triangle and get 220 in²
[tex] \sqrt{1.69} - \sqrt[3]{0.001} [/tex]
Answers
Given:
The expression is:
[tex]\sqrt{1.69}-\sqrt[3]{0.001}[/tex]
To find:
The value of the given expression.
Solution:
We have,
[tex]\sqrt{1.69}-\sqrt[3]{0.001}[/tex]
On simplification, we get
[tex]\sqrt{1.69}-\sqrt[3]{0.001}=1.3-0.1[/tex]
[tex]\sqrt{1.69}-\sqrt[3]{0.001}=1.2[/tex]
Therefore, the value of the given expression [tex]\sqrt{1.69}-\sqrt[3]{0.001}[/tex] is 1.2.
A rectangular portrait has an area of 40 square feet it's perimeter is 26 feet what are the dimensions of the portrait?
Answers
Answer:
Step-by-step explanation:
Portrait is in the shape of a rectangle.
And the area of a rectangle = Length × Width
Let the length of the portrait = l
And width of the portrait = w
Area of the portrait = lw
lw = 40
l = [tex]\frac{40}{w}[/tex]
Perimeter of a rectangle = 2(Length + width)
Perimeter of the portrait = 2(l + w)
26 = 2(l + w)
l + w = 13 ----------(2)
By substituting the value of 'l' in equation (1) from equation (2)
[tex]\frac{40}{w}+w=13[/tex]
40 + w² = 13w
w² - 13w + 40 = 0
w² - 8w - 5w + 40 = 0
w(w - 8) - 5(w - 8) = 0
(w - 5)(w - 8) = 0
w = 5, 8 feet
From equation (2)
l = 8, 5 feet
Therefore, dimensions of the portrait are (5 feet by 8 feet) Or (8 feet by 5 feet).
25x=1252-x exponential equation
Answers
Step-by-step explanation:
25x = 1252 - x
We know that in order to solve this equation, we have to move all the x terms to one side and all of the coefficients to the other. So, if we add x to both sides, we get 26x = 1252.
Then, we can divide both sides of the equation by 26 to solve for x, so x≅48.15 or x = 48.153846 repeating.
can someone please help me in my recent math problem :((
Answers
Answer:
sure
Step-by-step explanation:
tip, add the question.
solve for x
your answer must be simplified
[tex] \frac{x }{ - 9} \geqslant 3[/tex]
Answers
Answer:
x ≤ -27
Step-by-step explanation:
multiply each side by -9
when multiplying or dividing an inequality by a negative value you must reverse the inequality symbol
At a local college, 100 students were asked about their major fields of study. The results are shown
below. What is the probability that a randomly selected student is a female or a liberal arts major?
Majors at Local College
Mathematics/science Liberal Arts
16
20
15
18
Business Studies
14
17
Male
Female
19
50
Done
Answers
7/10 would be the probablity
7/10 is the probability that a randomly selected student is a female or a liberal arts major.
Let us determine the number of female students:
15 + 18 + 17 = 50.
Determine the number of students majoring in liberal arts:
20 + 18 = 38.
Determine the number of students who are both female and liberal arts majors: 18.
Add the number of female students and the number of liberal arts majors, but subtract the overlap (students who are both female and liberal arts majors):
50 + 38 - 18
= 70.
Divide the result by the total number of students:
70 / 100
= 7/10.
Hence, the probability that a randomly selected student is a female or a liberal arts major is 7/10.
To learn more on probability click:
https://brainly.com/question/11234923
#SPJ6
check the picture please if you're good at math!!
Answers
Answer:
A
Step-by-step explanation:
The triangles aren't similar.
The triangles share a side so we cant use anything involving SSS SAS.
The triangles has only known congruent angle so we cant use AA.
Please answer :puppy eyes emoji:
Answers
Nathan has four brown teddy bears, 5 pink teddy bears and 3 red teddy bears in his shop. Two teddy bears are bought, one at a time. What is the probability that both teddy bears were brown?
Answers
Answer:
2
Step-by-step explanation:
Harper sold a $350,000 home. She earned 3% commission. How much did she make off the sale of the home?
Answers
Answer:
10500 dollars
Step-by-step explanation:
350,000 * .03 = 10500