Answers
Answer:
A
Step-by-step explanation:
We have the expression:
[tex]-4ab[/tex]
And we want to find its sign given that a>0 and b<0.
Notice that the expression is already negative since we have -4.
a>0 means that a is positive. Therefore, we can ignore it since it won’t do anything.
b<0 means that b is negative. Therefore, we will have two negatives being multiplied together. Hence, this will make a positive.
Therefore, the sign of our expression will be positive.
We can see this with an example. Let a=1 (1>0) and let b=-1 (-1<0). Then:
[tex]-4(1)(-1)=4[/tex]
So, the sign is positive.
Hence, the answer is A.
Answer:
The answer is A
Step-by-step explanation:
khan said so
Related Questions
2. A jar contains 660 beans. Of them, 440 are kidney beans and the rest are cranberry
beans. What is the ratio of kidney beans to all the beans?
Please help y’all! I’m confused!
Answers
Answer:
2/3
Step-by-step explanation:
They didn't ask about the cranberries so just simplify 440/660 which is 2/3
Estimate. Tell whether the estimate is greater than or less than the actual product.
52 x 11
Answers
Answer:
D
Step-by-step explanation:
because the estimate of 52 is 50 and the estimate of 11 is 10 so there.
9 1/3 minus 3 1/4 as a mixed number
Answers
Answer: i got 6 83/1000
Step-by-step explanation:
2. Eldon helps people load their groceries into their cars at the
grocery store. The grocery store pays him $5.15 per hour. In one
week he worked 38 hours and earned $425.00 in tips. What was
his total income?
Answers
Answer:
$620.7
Step-by-step explanation:
$5.15 × 38 = $195.7
$195.7 + $425.00 = $620.7
What is the expression -7x2 + 32x + 240 in factored form?
a) (-7x – 60)(x + 4)
b) (7x + 60)(x + 4)
c) (-7x + 60)(x + 4)
d) (-7x + 60)(x – 4)
Answers
Answer:
a) (-7x – 60)(x + 4)
Step-by-step explanation:
;)
How many 1/6 hamburger patties can be made with 1/2 pound of hamburger meat
Answers
Answer:
3.
Step-by-step explanation:
please brainliest
Answer:
3 hamburger patties can be made
Step-by-step explanation:
If you do 1/6 + 1/6 + 1/6 it would be 3/6 which, when simplified, would be equivalent to 1/2
Hope this helps!
Mya is doing a 45-minute cardio workout. She has completed 4/5 of the workout. In how many minutes will her workout be done?
Answers
Answer:
9 minutes
Step-by-step explanation:
First, find 4/5 of 45 by multiplying 45 by 4/5:
(45)(4/5)
= 36
Then, to find how many more minutes she has left, subtract 36 from 45:
45 - 36
= 9
So, her workout will be done in 9 minutes
Answer:
9
Step-by-step explanation:
(45)/(4/5)=36
45-36 is 9
Which equation is equivalent to 7-2(3x+4)=8x
A -6x+15=8x
B-6x-1=8x
C15x+20=8x
Answers
just do distribution and combine like terms
The equation that is equivalent to the expression 7-2(3x+4)=8x is
-6x - 1 = 8x.
Option B is the correct answer.
We have,
To find the equation that is equivalent to 7-2(3x+4)=8x, simplify the given equation by applying the distributive property and combining like terms.
7 - 2(3x + 4) = 8x
First, distribute the -2 to the terms inside the parentheses:
7 - 6x - 8 = 8x
Combine like terms:
-6x - 1 = 8x
Thus,
The equation that is equivalent to the expression 7-2(3x+4)=8x is
-6x - 1 = 8x.
Learn more about equations here:
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HELP WILL MAKE BRAINLIST TO WHOEVER DID IN EXPLAINATION
Answers
Answer:
The scouts hiked up the mountain in 1 mile.
Step-by-step explanation:
Juan cuts a piece of rope that is 16 meter long into 2 equal pieces. What is the length of each shorter piece of rope?
Answers
Answer:
8 meters each
Step-by-step explanation:
simplify [tex]x^2+6x+4/x+3[/tex]
Answers
Answer:
(x^3 + 6 x^2 + 3 x + 4)/x
Step-by-step explanation:
Simplify the following:
x^2 + 6 x + 3 + 4/x
Put each term in x^2 + 6 x + 3 + 4/x over the common denominator x: x^2 + 6 x + 3 + 4/x = x^3/x + (6 x^2)/x + (3 x)/x + 4/x:
x^3/x + (6 x^2)/x + (3 x)/x + 4/x
x^3/x + (6 x^2)/x + (3 x)/x + 4/x = (x^3 + 6 x^2 + 3 x + 4)/x:
Answer: (x^3 + 6 x^2 + 3 x + 4)/x
The graph of y>1/2x-2 is shown. Which sweet contains only points that satisfy the equality
Answers
Answer:
hi I dont think I can help I am only 9 year old and am in grade 5 so
how to do this T-T?
The difference between 20th and 40th term is 40. Find the 100th term if the second
term is 2.
Answers
Answer:
198
Step-by-step explanation:
t20=a+19d.......1
t40=a+39d.......2
t2=a+d=2.........3
According to ques,
t40-t20=a+39d-(a+19d)=40
or,20d=40
or,d=2
Now ,putting the value of d in equation 3,we get,
a=0
t100=a+99d
=0+99×2
=198
what is the slope of the line
Answers
Jasmin can walk 1/4 mile every 1/5 hour. At this rate, how far can Jasmin
walk in one hour?
Answers
Answer:
hope this helps :)
Step-by-step explanation:
Since we know how far she can walk in 1/5 (one fifth) of an hour, if we multiply this distance by 5, we will find out how far she can walking in 5/5 (five fifths) of an hour, or to be clear: in one hour.
So, 5 x 1/4 miles = 5/4 or 1.25 miles per hour
Jazmeen can walk 1.25 miles in one hour.
Which triangle is a 30°-60°-90° triangle?
Answers
Answer:
right triangle
Step-by-step explanation:
Answer:
A right triangle
Step-by-step explanation:
A 30-60-90 triangle is a special right triangle (a right triangle being any triangle that contains a 90 degree angle) that always has degree angles of 30 degrees, 60 degrees, and 90 degrees.
what is 22.5%written as a fraction in simplest form ? plz help
Answers
Answer:
22 1/2 or 45/2
Step-by-step explanation:
A class has 30 students. 18 are boys. what id the ratio of boys to girls? (you must simplify)
Answers
Answer:
number of students =30
boys =18
girls =30-18=12
therefore,the ratio of boys :girls
=18:12
then simpilyfing, =3:2
The ratio of the number of boys to girls in the class is 3 : 2
Total number of students = 30
Number of boys = 18
Nunber of girls = 30 - 18 = 12
The ratio of boys to girls :
Number of boys : Number of girls 18 : 12Simplify to lowest term :
Divide both sides by 63 : 2Therefore, the ratio of boys to girls is 3 : 2
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Helpppp will give brainlist !!!!!!
Answers
Answer:
8. The coordinates (0,0) represent the fact that when 0 minutes has passed, the horses have gone 0 miles because they hadn't started yet.
9. From the graph, it looks like horse A takes 4 minutes and horse B takes 2.5 minutes (aka 2 minutes and 30 seconds) to travel 1 mile.
10. For A: y = (1/4)x
For B: y = (2/5)x
11. For A: 3 miles
For B: (24/5) miles, or 4 and (4/5) miles.
12. Can't see the entire problem sorry.
Step-by-step explanation:
9. You find this by going to y=1 and look towards the right till you find the point the line intersects with y=1. Then find the x value by finding the corresponding number on the x axis.
10. A linear function will look something like this: y = mx+b, where y is the y value, x is the x value, m is the slope, and b is the y-intercept. Since both lines start from 0, you don't have to write the y-intercept since there's no point in writing +0. To find slope, you find delta y over delta x. Basically just find the difference of two y values and the difference of two x values from the same coordinate in the same order. I know that sounds really confusing but your teacher will probably teach this later on.
11. x represents the time, so just substitute x as 12 in the equation.
work out the area of the trapezium abde
Answers
Step-by-step explanation:
you need to attach a photo to show us what this looks like
Use substitution to solve the system.
X= 2y-5
4x+3y=-9
Answers
Step-by-step explanation:
x=2y-5 - equation 1
4x+3y=-9 -equation 2
Replace equation 1 in equation 2
4(2y-5)+3y=-9
8y-20+3y=-9
11y=-9+20
11y=11
y=11/11
y=1
If y=1, therefore x=2(1)-5=-3
x=-3,y=1
What is an equation of the line that passes through the point (- 1, 2) and is parallel to the line 3x + y = 3 ?
Answers
Answer:
y=-3x-1
Step-by-step explanation:
hope it helps.
y = 8x- 18
y-intercept:
x-intercept
:
Answers
Answer:
the y-intercept is -18
Step-by-step explanation:
hope i couldve help :)
express as a unit rate. $18.50 for 5 lbs
Answers
Answer:
3.7 dollars per lb
Answer:
$3.70 per lb
Step-by-step explanation:
It's asking how much money for one pound. So, right now the equation is
18.5=5lbs
divide by 5 on both sides
3.7=1lb
so, $3.70 per lb
The equation r = 4sin(θ) represents a circle. What is the radius of the circle, and what is the symmetry of the graph?
Answers
Answer:
The radius is 2 units, and the graph is symmetric about the line Theta = StartFraction pi Over 2 EndFraction. Its A
Step-by-step explanation:
Darrin orders 24.5 square feet of granite countertop for his kitchen.
If hepays $428.75 for the granite, what is the cost per square foot?
Answers
Answer:
37.9
Step-by-step explanation:
5. Elena bought 8 tokens for $4.40.
b. How much does 19 tokens cost?
Answers
Answer:
8 = 4.40
9 = x
9(4.40)=39.6
39.6/8=4.95
So 19 tokens cost $4.95.
Step-by-step explanation:
The 19 tokens cost $104.5.
What is Unitary method?
In order to solve a problem for two different values of a quantity, its unit value is first derived. This method is known as unitary method.
Given that,
The price of 8 tokens is $4.40.
In order to find the cost for 19 tokens the unitary method is used as,
The cost for 1 token = $4.40/8
= $5.5
So, the cost for 19 tokens is 19 × 5.5 = $104.5
Hence, the cost for 19 tokens is $104.5.
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The distance between New York and Philadelphia by railroad is 90 miles; the distance between them by river and ocean is 240 miles. What fraction of the second distance is the first one?
Answers
Answer:
3/8
Step-by-step explanation:
Well, just put the first one over the second one.
90/240
and simplify
=3/8
Answer:
3/8
Step-by-step explanation:
90/240 divided by 10 is 9/24
9/24 divided by 3 is 3/8
3/8 is the simplest form
hope this helps :3
if it did pls mark brainliest
What is the solution to the inequality 7<=-3x-4
Answers
Answer:
The nearest option is -3 (negative 3)
So, Option B is correct.
Step-by-step explanation:
We need to solve the inequality [tex]7 \leq -3x-4[/tex]
Solving:
Step 1: Switching sides of inequality and reversing the inequality
[tex]-3x-4\geq 7[/tex]
Step 2: Adding 4 on both sides
[tex]-3x-4+4\geq 7+4\\-3x\geq 11[/tex]
Step 3: Dividing both sides by -3 and reversing the inequality
[tex]\frac{-3x}{-3}\leq \frac{11}{-3} \\x\leq -3.6\\[/tex]
The nearest option is -3 (negative 3)
So, Option B is correct.
Evaluate the following rational equations below, and identify which rational equation is transformable to a quadratic equation. Cross-out the rational equation transformable to a quadratic equation.
m+7 18
___ = __
9 4m
Answers
Answer:
2m^2 + 14m - 81 = 0Step-by-step explanation:
It looks like
(m + 7)/9 = 18/4mCross-multiplication:
4m(m+7) = 9*182m(m+7) = 9*92m^2 + 14m = 812m^2 + 14m - 81 = 0Here is the quadratic equation