Mathematics High School

Evaluate each expression for a=7,b=4,and c=-3.

3a-5b =________

7-3a+5a+15 =________

15a^2-17〖bc〗^2 =________

Pls help me

Answers

Answer 1

Answer:

Step-by-step explanation: 3a-5b= 3(7)-5(4)

                                                       =21-20

                                                       =1

7-3a+5a+15=7-3(7)+5(7)+15

                   =7-21+35+15

                   =-14+50

                   =36

15a^2-17(bc)^2=15(7)^2-17(4)(-3)^2

                         =105^2-204^2

                         =210-408

                         =-198

Related Questions

I need help with this pls

Answers

Answer:

what is the imaginary part of 84-25i

Step-by-step explanation:

the result is -25i

I hope I've helped

Find the length of the indicated
side of the similar figure.
24
18
24
x =
[?]
Enter the nutriber that belongs in the green box

Answers

10,368 that the answer
since they’re similar triangles, you can use the vertical legs to find the ratio between them: 24/18. make it equal to the other sides since the ratio should be equal, so the formula is 24/18=X/24, when solved the answer should be 32 :)

someone please help me ASAP!!!

Answers

Answer:

14.1372 m

Step-by-step explanation:

Tom knew that he needed to have at least
$60 to buy a bus ticket. He had $150 in his
bank account and each month he paid his
phone bill. If his phone bill is $30 a month,
how many months can he pay his phone bill
and still have enough for his bus ticket?

Answers

3 months
Subtract 60 from 150 which gives you 90 then see how many times he can pay monthly
1 month
$90 dollars in total needed to buy bus ticket and phone bill for 2 months $180 is needed so 1 month and $60 leftover

What is the measure of angle n°?

Answers

The measure of angle n is 45 degrees.

This polygon is what we call an octagon, having 8 sides.

So, to find the measures of the exterior angles, we can take 360 degrees divided by 8 angles to arrive at 45 degrees for each exterior angle, known as angle n. :)

what is 5+3








.dr4d3rf4rybduuuuuuuuuuuuuuuuuuuuuugnUYF$r

Answers

Answer:

8

Step-by-step explanation:

please give me the answer

Answers

Answer: i’m pretty sure it’s a, if not you can delete this message.

Answer:

B (1.5,2)

Step-by-step explanation:

(4-1)/2,(0+4)/2=

3/2,4/2=

(1.5,2)

pls help quick :( worth 20 pts

Answers

Answer:

Answer A

Step-by-step explanation:

From the image, it looks like the answer is y<1/2x+2 because the shading of the line is below, as well as the points of interception are 4 and 2. I hope this helps!

Can anyone help me with this question?

Answers

Answer:

sorry I can't I am too young

Step-by-step explanation:

Select the correct answer.
Which graph shows a function and its inverse?

Answers

Answer:

B

Step-by-step explanation:

If we consider a point on the line (x, y ) then the corresponding point on the inverse, the other line will be (y, x )

A function and its inverse are reflections in the line y = x

Consider the point (1, 5 ) on the red line, the corresponding point on the blue line will be (5, 1 )

This is the case in graph B

The graph showing a function and its inverse is the graph D.

What is graph?

A graph can be defined as a pictorial representation or a diagram that represents data or values in an organized manner.

The graph of a function and its inverse are symmetric with respect with the line y = x.

On each graph you are given, plot the line y = x. If the two functions are symmetric with respect to the line y = x, then the graph does show a function and its inverse.

You will see this is true only for choice D.

Hence, the correct graph is D

Learn more about graphs, click;

https://brainly.com/question/17267403

#SPJ7

This is a math question from highschool (LOOK AT PICTURE)​

Answers

Answer: The answer is 12q-1/2

Step-by-step explanation:

I do this do y'all can get extra point and complete challenges!
What is 3 + 3

Answers

Answer:

6

Step-by-step explanation:

3 + 3 = 6

Answer:

6 hehe

Step-by-step explanation:

Kacie swam for 12 hours this week at YMCA pool. 25% of her pool time was spent on tree swim. The rest was in swimming classes. How many hours did Kacie spend in swimming classes?

Answers

Answer:

9 hours

Step-by-step explanation:

25% of 12 is 1/4 of 12.

12/4 is 3.

25% of 12 is 3.

12-3=9

PLEASE HELp !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

c

Step-by-step explanation:

you have to divide.....hope this helps!

Solve the simultaneous equations
3x - y = 5
-x + y = -1

Answers

Answer:

x= 2, y= 1

Step-by-step explanation:

3x -y= 5 -----(1)

-x +y= -1 -----(2)

(1) +(2):

3x -y -x +y= 5 -1

2x= 4

Divide both sides by 2:

x= 4 ÷2

x= 2

Substitute x= 2 into (2):

-2 +y= -1

y= -1 +2

y= 1

The regular price of a code is $32 it is on sale at 25% off the sales tax is 6.5% what is the final cost of code

Answers

Answer:

$25.56

Step-by-step explanation:

first find the discount

32 • 0.25 = 8

32 - 8= 24

find the tax

24 • 0.065 = 1.56

24 +1.56 = 25.56

so the final price is $ 25.56

Answer:

25.56

Step-by-step explanation:

25% of 32= 8

32-8= 24

6.5% of 24= 1.56

24+1.56= 25.56

I hope this helped! Also, the Semester Knowdowns are done in a week! Start trying to get higher scores!

3/4+4y÷3;y=1 1/22 please help

Answers

Answer:3

4

+

4

(

y

3

)

.

3

4

+

4

(

y

3

)

=

4

y

3

+

3

4

y

=

11

22

=

=

1

2

Step-by-step explanation: :)

Is that the right answer

Answers

Answer:

I believe so!

Step-by-step explanation: makes since to me!!

if u drove 45 miles in 75 min how many miles did u drive per min

Answers

Answer:

11.25

Step-by-step explanation:

i hope this is right sry if its not tho

Answer:

How many miles is a 45 minute drive? 45 min is 0,75*60 min. During this time you'll drive 0,75*60= 45 miles.

Step-by-step explanation:

Together, 2 apples have 1/5 gram of fat. How many apples have a total of 4 grams?​

Answers

Answer:

40 apples

Step-by-step explanation:

Together, 2 apples have 1/5 gram of fat. How many apples have a total of 4 grams?​

so 1 apple has 1/10 gram of fat

10 apples = 1 gram of fat

10 * 4 = 40 apples have a total of 4 grams

write the following equations in the statement form...

1) 2a + 7 =15

pls ans fast but as statement form​

Answers

Answer:

4 or 2 times unknown number added with 7 it gives 15

Step-by-step explanation:

2a+7=15

2a=15-7

2a=8

a=4

Answer:

2a+7=15

2a=15-7

2a=8

2a/2=8/2

a=4

The measures of angles x and y in the above figure is:

Answers

Step-by-step explanation:

sum of 2 angles on a straight line = 180°

therefore,

y + 120 = 180

y = 180 - 120 = 60

y = 60°

now apply angle sum property of triangle

now,

50 + x + y = 180

50 + x + 60 = 180

110 + x = 180

x = 180 - 110

x = 70

therefore, x = 70 & y = 60

hope this answer helps you dear! take care

Answer:

x = 70°

y = 60°

Step-by-step explanation:

hope it helps u

plzz plzz pLZZ MARK AS BRAINLIEST

i need help please no bots

Answers

Answer:

>

Step-by-step explanation:

Squares eventually get bigger then when you multiply

Lucy deposits $200 into an account that pays simple interest at a rate of 3% per year. How much Interest will she be paid in the first 3 years?

Answers

Answer:

$16.48

Step-by-step explanation:

Split this up into the four years.

For the first year, multiply 200 x .02 to get 4

Add 4 onto your total. ($204.00)

For the second year multiply 204 x .02 to get 4.08

Add 4.08 onto your total. ($208.08)

For the third year multiply 208.08 x .02 to get 4.1616 but round to 4.16

Add 4.16 onto your total ($212.24)

For the fourth year multiply 212.24 x .02 to get 4.2448 but round to 4.24

Add 4.24 onto your total (216.48)

Now subtract 200 from your total

216.48-200 = 16.48

She will be payed $16.48 in interest.

Please Help meeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

6×4 = 24 m^3

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

Answer:

24 units

Step-by-step explanation:

because 6x4=24 units

Find the perimeter. Simplify your answer.

Answers

Answer:

20v-6

Step-by-step explanation:

To find the perimeter we have to add up all of our sides

9v-6+9v-6+2v+6

Combine light terms

20v-6

In a class of 35 student 19 takes history and 12 take Economic.if 5 take both subject how many take neither?

Answers

4
35 - 12-19 = 4
The 5 that take both are included in the 12 and 19.

What is the slope?
Simplify your answer and write it as a proper fraction, improper fraction, or integer.

Answers

Answer:

it's rise/run 3/2

Step-by-step explanation:

you rise positive 3 and run 2

Slope is a value that describes the steepness and direction of a line.

Solve the equation for x.

x + 13 = 22​

Answers

x + -13 = 22

Reorder the terms:

-13 + x = 22

Solving

-13 + x = 22

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '13' to each side of the equation.

-13 + 13 + x = 22 + 13

Combine like terms: -13 + 13 = 0

0 + x = 22 + 13

x = 22 + 13

Combine like terms: 22 + 13 = 35

x = 35

Simplifying

x = 35

Work is shown to solve for the system of equations.

Why does the answer for y indicate that the system has no real number solutions.

O The solution does not solve for X first.

O The values for Y are square roots of negative numbers.

O The values for y have square roots.

O The values for Y have a positive and a negative value.

Answers

Answer:

B The values for y are square roots of negative numbers.

Answer:

b

Step-by-step explanation:

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