4x^2-7x=15
Solve by factoring and please please please explain or show the work
Answer:
x=3 and x=-1.25
Step-by-step explanation:
4x^2-7x=15
subtract 15 from each side:
4x^2-7x-15=0
factor (trying different numbers that the sum is 7 and the quotient is 15)
(2x-6 )(2x+2.5 )=0
2x-6=0 add 6 to each side
2x=6
x=3
2x+2.5=0 subtract 2.5 from each side
2x=-2.5
x=-1.25
PLZZ help me !funurn
Answer:
12/25
Step-by-step explanation:
Carlos has saved $19.80. Shaq saved 5/6 of the amount that Carlos saved. Deontae saved 4 times as much as Shaq. What is the total saved amount of all three.
Can you help me please!!!!
Answer:
Step-by-step explanation:
(-10,0)(0,-4)
find slope
m=-2/5
b=-4
y=-2/5x-4
Answer:
y=mx+b
y=-2/5x -4
(-10,0),(-5,-2)
Step-by-step explanation:
Evaluate using logrithm
© 12:59 x 31540
Answer:
Step-by-step explanation:12 MJULTIPKLA BY 13
Patrick is x years old . His brother is 9 years older than he is .If his brother is y years old, express y in terms of x
Answer:
y = x + 9 ( in years)
Step-by-step explanation:
Given that Patrick is x years old and his brother is 9 years older than he is. Then;
His brother's age will be
= x + 9
If his brother is y years old then
y = x + 9
Since y is the subject, y has been expressed in terms of x. Where y is the age of Patrick's brother and x is Patrick's age.
what is the scale factor?
Answer:
4
Step-by-step explanation:
Answer:
The ratios would be 5:7 and 20:28.
I believe the scale factor would be 4.
The larger box is 4 times the size of the smaller box.
A formula used for calculating volume of a cylinder is V=πr2h
Rearrange the formula so that the height, h , of the cylinder can be determined given the volume, V and the radius, r .
h=Vπr2−−−√
B
h=πr2V
C
h=Vπr2
D
h=πr2−−−√V
Answer:
V=πr2h
h=V/πr2
the answer is h=v/πr2
Sue is reading a book of 360 pages. She read some of the book last week. She plans to read 46 pages today. When she does, she will be 4/5 of the way through the book. How many pages did she read last week?
Answer: She read 242 pages last week.
Step-by-step explanation:
Total pages = 360
Let the number of pages she read last week = x
( Pages read last week) + (Pages read today) = [tex]\dfrac45[/tex] (Total pages)
i.e. [tex]x+46=\dfrac45(360)[/tex]
[tex]\Rightarrow x+46=288\\\\ \Rightarrow x= 288-46\\\\ \Rightarrow x=242[/tex]
Hence, she read 242 pages last week.
Does the graph represent a function? Choose the correct descriptor.
Answer:
-negative acceleration and +positive velocity
For her daughter’s birthday party, Mrs. Tanner paid $75.00 for 15 movie tickets.
Which unit rate describes the price of each ticket?
A. $1.00 per ticket
B. $3.00 per ticket
C. $5.00 per ticket
D. $7.50 per ticket
Answer:
C-$5.00 per ticket
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
$75.00 / 15 = $5
Each ticket costs $5
plssss help me this is due tomorrow morning
Find percent -> 2nd month.
4264*.25==1066 phone calls+=4264
==5330 for 2nd month.
for 2nd -> 3rd
6396==5330*x, solve algebraically to get .20 == 20% increase from 2nd month to 3rd month.
What are the roots of 0=9x^2-49
7/3 or -7/3
Step-by-step explanation:
Answer:
x=-7/3, 7/3.
Step-by-step explanation:
0=9x^2-49
9x^2-49=0
factor
(3x+7)(3x-7)=0
3x+7=0, 3x-7=0
3x=0-7, 3x=-7, x=-7/3
3x=0+7, 3x=7, x=7/3
Find the missing value of this triangle
Answer:
i think 28
Step-by-step explanation:
Answer:
It's a 90 degree angle because it is a perfect right angle
PLEASE HELP
Which term best describes the two lines
represented by the equations below?
y = 1/3 x-5 y = 1/3x +7
A) Same Line
B) Parallel
C) Intersecting
D) Neither.
NO ONE IS ANSWERING THIS QUESTION! PLEASE HELP! ANSWER BOTH OF THE QUESTIONS,
Answer:
Statement false.
Statement true.
Step-by-step explanation:
The left hand side of the equation is not equal to the right hand side, the statement is false.
[tex]16\% \: of \: 250 \: = 0.16 \: \times \: 250 = 40[/tex]
[tex]16\% \: of \: 250 \: is \: equal \: to \: 250\% \: of \: 16[/tex]
The result of both statement is the same, the statement is true.
Answer:
The top one is correct because ive done it.
Step-by-step explanation:
x
=
x=x, equals
∘
∘
degrees
Please help what’s the answer??
Answer:
Its correct answer is sin65°/125.
PLEASE HELP IM ON MY LAST ONE!!!
Answer:
C!!
Step-by-step explanation:
please help ASAP giving brainliest
Answer:
Step-by-step explanation:
1=128
2=0.4
3=490
helppppppp PLS ASAPPP
Answer:
C
Step-by-step explanation:
First, let us understand that in simple terms the conjugate of a radical simply involves the change in sign of the radical
in the problem the conjugate of x+4+5
Make p the subject of the formula k = root p-3r
Answer:
p = k ^2 + 3 r
Step-by-step explanation:
The solution of the given equation k = √(p - 3r) for p will be p = k² + 3r.
What is the equation?There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.
In another word, the equation must be constrained with some constraints.
As per the given equation,
k = √(p - 3r)
Square on both sides as,
k² = (√(p - 3r))²
k² = p - 3r
Add 3r on both sides as
k² + 3r = p - 3r + 3r
k² + 3r = p
Hence "The solution of the given equation k = √(p - 3r) for p will be p = k² + 3r. ".
For more about the equation,
brainly.com/question/10413253
#SPJ2
An artist spent $75 on supplies to create paintings. Each painting the artist created was sold for $25. Which function can be used to find p, the profit when c paintings are sold?
Answer:
Step-by-step explanation:
The function can be used to find p, the profit when c paintings are sold is p = 25x - c.
Given that, an artist spent $75 on supplies to create paintings.
What is the function?Functions are the fundamental part of the calculus in mathematics. The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.
Let the x be the number of paintings sold.
Now selling price of articles = $25x
Profit (p) = 25x - c
Hence, the function can be used to find p, the profit when c paintings are sold is p = 25x - c.
To learn more about the function visit:
https://brainly.com/question/28303908.
#SPJ2
HELP I NEED BOTH OF THESE QUESTIONS ANSWERD AND GRAPHED ON A PAPER for 20 POINTS ! Will Mark u brainlist
Answer:
1 (-4,5), (-2,1) (2,2) (5,5)
2 (0,1) (-4,3) (-4,1)
Step-by-step explanation:
Answer:
(-4,5), (-2,1) (2,2) (5,5)
Step-by-step explanation:
Faith went shopping for a new phone on sale. The store was offering 50% discount. If the price on the tag was $38 what would be the price after the discount but before tax,to the nearest dollar and cent
Answer:
$19
Step-by-step explanation:
equivalent ratio
24:30=
44:99=
108:36=
33:9=
49:14=
Answer:
Step-by-step explanation:
24 : 30 = 4 : 5
44 : 99 = 4 : 9
108 : 36 = 3 : 1
33 : 9 = 11 : 3
49 : 14 = 7 : 2
Please Help me. Also if you could show your work thatd be great.
Answer:
3) [tex]all \: real \: numbers[/tex], [tex]( - \infty , \infty )[/tex], or [tex]- \infty \leqslant x \leqslant \infty[/tex] (same thing)
4) [tex] - \infty < y < 0[/tex] or [tex]( - \infty ,0)[/tex] (same thing)
5) [tex]-2[/tex] or [tex](0, -2)[/tex] (same thing)
Step-by-step explanation:
3) Domain represents the amount of [tex]x[/tex]-values in a function. The image shows that the function's arrows point in both directions (right and left), infinitely, so the domain would be [tex]all \: real \: numbers[/tex], [tex]( - \infty , \infty )[/tex], or [tex]- \infty \leqslant x \leqslant \infty [/tex](same thing).
4) Range represents the amount of [tex]y[/tex]-values in a function. The function goes downward forever ([tex] - \infty < y[/tex]) by the indication of an arrow and halts just under the y-axis ([tex]y < 0[/tex]). After combining these two inequalities, you see that the range is [tex] - \infty < y < 0[/tex] or [tex]( - \infty ,0)[/tex] (same thing).
5) The [tex]y[/tex]-intercept is where the function crosses the [tex]y[/tex]-axis. In this function, the [tex]y[/tex]-intercept is [tex]-2[/tex] or [tex](0, -2)[/tex] (same thing).
1/2 gallon in 5 hours how many gallons per hour
help...............
I'll give brainliest and heart
Answer:
-5
Step-by-step explanation:
the opposite of plus 10 is negative so u add negative 10 to positve and do the same to 5
What is the value of -12/a if a = -4?
A: -3
B: -1
C: 3
D: 4
Anyone help please?
:(
Answer:
C
Step-by-step explanation:
-12
---- if a = -4
a
-12
-----
-4
= 3