Answers
Answer:
Part A: x+y=75 is the 1st linear equation
y=25+x
Part B:
x+y=75
x+(25+x)=75
2x=50
x=25
she spends 25 mins running
part c : no because if she spends 45 mins
then x+y=70
but x+y=75
she spends 50 mins dancing
Related Questions
Can someone Help me ASAP plss!!
Answers
In the figure shown, What is the value of x? a. 57° b. 123° c. 33° d. 147°
Answers
d. 147 degrees
Explanation:
Please check the picture attached after reading the explanation :)
Assuming that l1 and l2 are parallel, we can identify that the angle at the intersection point of l3 and l2 is the alternate exterior angle of the angle that measures 57 degrees.
This means that that angle also measures 57 degrees.
We can see that l2, l4 and l3 form this little triangle at the corner and we now know that one of its angles measure 90 degrees and the other measures 57 degrees.
In a triangle, the sum of all its interior angles is equal to 180 degrees so we can find the last angle of the triangle by subtracting 90 and 57 from 180.
180-57-90
=33 degrees
A straight lines has an angle measure of 180 degrees as well, so we can find angle x by subtracting 33 from 180.
180-33
=147
Therefore, the measure of angle x is 147 degrees.
I hope this helps!
Find the sum of all integers between −102 and 104.
Answers
The integers from -102 to 102 would all cancel, leaving you with
(-102) + (-101) + ... + 0 + 1 + 2 + ... + 101 + 102 + 103 + 104
= 103 + 104
= 207
All sides are congruent.
5. Is this figure a polygon?
Answer the questions below only if the figure is a polygon.
la. Is this polygon concave or convex?
1b. Is this polygon regular, equiangular, equilateral, or none of these?
1c. What is the name of this polygon?
Answers
Answer:
Yes it is a ploygon
convex
both
octagon
Step-by-step explanation:
Not quite sure about the answer but it seems simple. Please answer!
Answers
Answer:
Its A
Step-by-step explanation:
Can anyone help it would mean alot im struggling right now
Answers
Answer:
what do you need? ^-^ I can help you
David Read 156 books Victoria read 98 books more than David how many has Victoria read
Answers
Step-by-step explanation:
David read 156 books
Victoria read 98 books more than David
Victoria read 156 + 98 = 254 books
7th grade math help me pleaseeeee
Answers
Answer:
Monique is correct.
Step-by-step explanation:
You take the absolute value of both numbers (which means the positive version of it) and add that together.
7+17=24
What is the value of the expression when a = 6, b = 4, and c = 8?
2a3b−c
A. 1
B. 3
C. 8
D. 12
Answers
Answer:
a the answer is a
Step-by-step explanation:
Answer:
He is wrong i took the test and it is three/B
Step-by-step explanation:
Brainlyiest pls
A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only wants a 5% margin of error at a 99% confidence level, what size of sample is needed?
Give your answer in whole people.
ME=8%=0.08
CL=90%=1.645
n=?
Answers
Answer:
666
Step-by-step explanation:
From this question,
a = 1-99%
a = 1-0.99
a = 0.01
5% = z(0.05) = 2.58 when we check the standard normal table
Therefore we calculate n as:
n = (z/E)²*p*1-p
Z = 2.58
E = 0.05
P = 0.5
1-p = 0.5
(2.58/0.05)²x0.5x0.5
= 51.6²x0.5x0.5
= 665.64
Therefore n is approximately 666.
You start at (3,-3). You move down 2 units and up 6 units. Where do you end? On a coordinate plane
Answers
Answer:
(3 , 1)
Step-by-step explanation:
(3 , - 3)
(3 , - 3 - 2 + 6) = (3 , 1)
.
Determine the value of each of the following expressions
a.
25+310
b.
56−13
c.
45×78
d.
67÷34
Answers
b. 43
c. 3510
d. 1.9705
ANSWER PLS OR NOTHING WILL HAPPEN
Answers
Answer: 8
Step-by-step explanation:
Answer:
[tex]( - 4)( - 2) = \boxed{8}[/tex]
Solve the system by substitution or elimination. {y=2x+8y=3x−1 A. (95,585) B. (7, 22) C. (9, 26) D. (75,545)
Answers
Answer:
C. (9, 26)
Step-by-step explanation:
By Substitution:
y = 2x + 8
y = 3x - 1
---------------------
2x + 8 = 3x - 1
-x + 8 = -1
-x = -9
x = 9
Now we can choose either of the two equations given to solve for y:
y = 2x + 8
y = 2(9) + 8
y = 18 + 8
y = 26
(9, 26)
By Elimination:
For this process, I am going to rewrite the equation in "x + y" for as it will make it easier to eliminate the variables
y = 2x + 8
2x - y = -8
y = 3x - 1
-3x + y = -1
-----------------
2x - y = -8
-3x + y = -1
-----------------
-x = -9
x = 9
2x - y = -8
2(9) - y = -8
18 - y = -8
-y = -26
y = 26
(9, 26)
Find the value of n.
9 x -1 x n = 9 x -3
Answers
Answer:
n=3
Step-by-step explanation:
9 x -1 x n = 9 x -3
-9n=-27
9n=27
n=27/9
n=3
So value of n is 3
evaluate the expression a +7 when a=4, b=2, and c=8
Answers
Answer:
a + 7
so "a" is 4 so
4+7=11
Hope this helps!
If a=4 and the equation is a+7 then the equation would be, with the numbers plugged in, 4+7 which equals 11.
Answer: 11
PLS ANSWER ASAP!!!!!!!!!! I WILL GIVE BRAINLIEST FOR THE FIRST PERSON TO GET IT RIGHT
A small box (s ) contains 8 donuts and a large box (l ) contains 12 donuts. Sam bought 10 boxes of donuts containing a combined total of 108 donuts. Identify each equation that correctly describes the donut purchase. SO, THERE IS MORE THAN ONE ANSWER!!!!!
s + l = 12
s + l = 10
10s + 8l = 12
12s + 8l = 108
8s + 12l = 108
s + l = 108
Answers
Calculator
2.25
What is the value of x?
D
3
Enter your answer in the box.
с
4
B
X =
Answers
Describe the graph of the line y =-5
Answers
Answer:
a horizontal line pass the y axis of -5
Please i need help
A point on a wheel has a constant angular velocity of 3 rad/s. The angle turned through in 15 seconds is:
45 rad
10π
5 rad
90π rad
Answers
I think 10
Hope this help
Solve 4(x-3) - 2(x - 1) >0.
{ xl x>-5)
{xl x>5]
{xl x<-5)
{xl x<5}
Answers
Answer:
{xl x > 5)
Hope This Helps!
Heyyy can someone help me please! xx
Answers
Answer:
option 2
Step-by-step explanation:
they have the same shape AND angle meaning they are more so similar than other options
The endpoints of a side of rectangle ABCD in the coordinate plane are at A (2,9) and
B (6, 1). Find the equation of the line that contains the given segment.
The line segment is AD.
The equation is y =
Answers
Answer:
y = [tex]\frac{1}{2}[/tex] x + 8
Step-by-step explanation:
A(2, 9)
B(6, 1)
[tex]m_{AB}[/tex] = [tex]\frac{1-9}{6-2}[/tex] = - 2
AB ⊥ AD ⇒ [tex]m_{AD}[/tex] = [tex]\frac{1}{2}[/tex]
A(2, 9)
y - 9 = [tex]\frac{1}{2}[/tex] (x - 2)
y = [tex]\frac{1}{2}[/tex] x + 8
I need help solving these!!!!
Answers
Answer:
4. y = -1/2x + 5
5. y = -1/3x + 3
6. y = 1
Step-by-step explanation:
For #4:
Because these lines are parallel, we know that they will have the same slope.
To get b, or the y-intercept, I just started at the point (4,4) and used the slope to work backwards to the y-axis. This is really not the best way to do it (especially with big numbers) but it works in a pinch. Also, I forgot the better way :/
For #5:
These lines are perpendicular. That means that the slopes are reciprocals of the other and, when multiplied with each other, the answer will be -1.
The reciprocal of 3 is -1/3.
To get the y-intercept, I did the same as above.
For #6:
x = 2 is a vertical line. To make a line perpendicular to it, that is, to make a line that intersects with it at 90°, the answer line will have to be horizontal.
That means that our answer is y = ?
We know that the line passes through a very specific point (2,1), and the line provided in the question already gives us the x value of this point. All we have to do is set y equal to the y value.
So, y = 1.
I hope this helps!
Solve the equation 4(2x-1)=11+3x+5
Answers
Answer:
x = 4
Step-by-step explanation:
4(2x-1) = 11+3x+5 simply both sides
(4)(2x)+(4)(-1) = 11+3x+5
distribute
8x+(-4) = 11+3x+5
8x−4=(3x)+(11+5) Combine Like Terms
8x−4=3x+16
8x−4=3x+16
Subtract 3x from both sides.
8x−4−3x=3x+16−3x
5x−4=16
Add 4 to both sides.
5x−4+4=16+4
5x=20
Divide both sides by 5.
5x/5 = 20/5
PLEASSSEEE HELPPP ASAPPPPP
Answers
Answer:
first one is 32
the second one is 53
Step-by-step explanation:
Answer:
Step-by-step explanation:
Let RS = x , then PS = x²
2x² + 2x = 84
x² + x - 42 = 0
(x + 7)(x - 6) = 0
x = 6
PQ and RS are 6
QR and SP are 36
For f(t)=t−2 and g(t)=t−5, find:
a) (f/g)(t)=
Answers
Step-by-step explanation:
[tex]f(t) = t - 2 \: \: \: \: \: \: \: \: \: g(t) = t - 5 \\ ( \frac{f}{g} )(t) = \frac{t - 2}{t - 5} [/tex]
perimeter of 4cm what is
Answers
Answer:
4 cm is the best answer for this one
length = 4cm
then
perimeter = 4L = 4* 4cm = 16cm
Suppose that R(x) is a polynomial of degree 7 whose coefficients are real numbers.
Also, suppose that R(x) has the following zeros.
-5-3i, 2i
Answer the following.
(a) Find another zero of R(x).
i
Х
(b) What is the maximum number of real zeros that R (x) can have?
(c) What is the maximum number of nonreal zeros that R(x) can have?
Help, these questions make no sense!
Answers
R(x) is a polynomial of degree 7, so it has up to 7 distinct complex roots r₁, ..., r₇, and we can write it in terms of these roots as
R(x) = (x - r₁) (x - r₂) ... (x - r₇)
The coefficients of R(x) are all real, so the roots must all be complex numbers, and any of these roots with non-zero imaginary parts must occur along with their complex conjugates. This means if a + b i is a root, then is a - b i is also a root.
(a) We're told that -5 - 3i and 2i are roots to R(x), so we also know that -5 + 3i and -2i are roots.
There are 4 roots accounted for, leaving us with 3 unknown roots. These roots cannot all be non-real, because we can only count 2 of them as a conjugate pair. So we can have either
(b) at most 3 real roots, or
(c) at most 2 non-real roots and 1 real root.
I need help with this.
