Mathematics High School

need help with this.

Need Help With This.

Answers

Answer 1

Answer:

k = - 12

Step-by-step explanation:

(5)³ - 7(5) + k = 78

125 - 35 + k = 78

k = - 12

Answer 2
the answer would be
k=-12

Related Questions

If the product of two rational numbers is (-9/16) and one of them is (-4/15) find the other number.​

Answers

Given:

The product of two numbers is (-9/16).One of the numbers is (-4/15)

To find: The other number.

Answer:

Let's assume the unknown number to be 'x'.

(-4/15) × x = (-9/16)

× = (-9/16) ÷ (-4/15)

When we divide a fraction by another fraction, the divisor will be taken in its reciprocal form.

x = (-9/16) × (-15/4)

x = 135/64

Therefore, the other number is 135/64.

Hope it helps. :)

The mean age of 3 women in an office is 30 years old.
The mean age of 7 men in an office is 33 years old.
What is the mean age (nearest year) of all the people in the office?

Answers

Answer:

32 years

Step-by-step explanation:

Here, we simply calculate the age of all first

For all men, we have 7(33) = 231

For all women = 3(30) = 90

So we simply have;

(90 + 231)/10 = 32.1

Approximately 32 years

A student scored 120 marks out of 200.
Write her marks scored as a fraction in lowest terms.​

Answers

120/200 simplified to lowest terms is 3/5.

fifteen subtracted from the product of a number and -4 is at most 32

Answers

Answer:

Step-by-step explanation:

Let's use the variable x to represent the unknown number.  

Also, the word, "product", indicates multiplication.  

In this problem, the product of a number and -4 would be represented as -4 x

The words, "is at most", would be represented as:  <

Then to create the inequality, subtract 15:

-4 x - 15 <  32

Now solve the inequality using inverse operations.  NOTE - Be sure to reverse the direction of the inequality symbol when multiplying or dividing by a negative number.

4 x - 15 < 32

-4 x - 15  + 15 < 32 + 15

-4 x < 47

-4 x / -4 >  47/-4

x  >  -47/4    

x  >  -11.75

Hope this helped!

Abe has some nickels and some pennies. If the pennies were nickels and the nickels were pennies, he would have 80 cents less than he has now. The difference between the number of nickels and the number of pennies that he has

A) Is 12

B) Is 20

C) Is 24

D) Is 28

E) Cannot be Determined

Answers

Answer:

B) Is 20

Step-by-step explanation:

Let X represent the number of pennies.

Let Y represent the number of nickels.

We know that X + 5Y = (Y + 5X) + 80.

4Y = 4X + 80

Y = X + 20

Hence, the difference between the number of pennies and the number of nickels is 20.

(I decided to answer this genius question just like how I have stated before XD)

3/4 divided by 5 1/5 =




3/7 divided by 2 1/2 =




5/8 divided by 6 5/6 =




8 3/10 divided by 5/8 =





7 2/9 divided by 8 3/9 =

Answers

0.1442
0.1714
0.05487
0.2075

SOMEONE HELP ME PLS

Answers

Answer:

the first one

Step-by-step explanation:

The ratio of money in Terry's bank account to Faye's bank account was 3:5.
Terry then put £220 in his account and Faye withdrew £300 from her account.
They now had the same amount in their accounts.
How much did Terry initially have?

Answers

Answer:

They initially had £1250 altogether.

Explanation:

Given : The ratio of money in Terry's bank account to Faye's bank account was 3:7.

Let the money in terry's bank account be 3x and the money in Faye's account be 7x.

if Terry put £220 in his account and Faye withdrew £300 from her account.

Money in Terry's account = 3x+200

Money in  Faye's account  = 7x -300

They now had the same amount in their accounts.

Now Initially ,

Amount in Terry's account = 3x= 3(125) = £ 375

Amount in Faye's account  = 7x =7 (125)= £ 875

Combined amount = £ 375 +  £ 875 = £1250

Hence, they initially had £1250 altogether.

# Learn more :

If the ratio of diameters of two sphere is 3:7 find the ratio of their volume, find the ratio of their surface area

Step-by-step explanation:

The sum of 3 consecutive numbers is 21. write and solve an equation that represents this situation. show your work​

Answers

Answer:

kqssshhskshks

Step-by-step explanation:

hxashbxjmbjzmjxbjsb

an olympic team won 20 medals. if 70% of the medals were gold, how many gold medals did they win?

Answers

Answer:

14

Step-by-step explanation:

20 times 7/10= 14

Answer:

14

Step-by-step explanation:

first change 70% to a decimal it is 0.70 then multiply 0.70 times 20 and you get 14

Write the equation of the line that passes through the points (-2,-5) and (8, -8).
Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal
line.

Answers

Answer:

y=-3/5x-16/5

Step-by-step explanation:

(-2,-2). When x of the line is -2, y of the line must be -2.

(8,-8). When x of the line is 8, y of the line must be -8.

Are these fractions equivalent or nonequivalent?
2s/3t 4s/6t

Answers

Answer:

Equivalent

Step-by-step explanation:

2/3 times 2=4/6

4/6 divided by 2=2/3

(hope this helps :P)

Help Please. I’ll mark brainliest !!!

Answers

Answer:

125?????

Step-by-step explanation:

Answer:

125

Step-by-step explanation:

Its 125 because that is a right triangle therefor all the sides are the same.

what does 40+19 equal?

Answers

Answer:

59

Step-by-step explanation:

it's my lucky number btw =w=

Devon invests $9,000 in a savings account that pays 1.5% simple interest. How much will be in the account after 6 years if Devon makes no withdrawals or deposits to the account?

Answers

$810 because if you use the simple interest formula (s=p*r*t), you get $810 hope this helped!

What is the slope of the line shown?

Answers

Answer:

-2

Step-by-step explanation:

down 4 over 2 meaning it's negative; simplify

what do you do to solve a problem that has just a negative in front of the parentheses?

Answers

if there is a negative symbol in front of the parentheses, it indicates that you must multiply what's inside the parentheses by -1 (if you only have a negative symbol in front of it) or multiply it by whatever negative number is provided.

Donovan wanted to measure the height of his town's
courthouse. He measured the length of the building's
shadow on the ground. It reached 60 feet from the
courthouse. His eyes are 6 feet above the ground and he
stood exactly 5 feet from the end of the shadow. Using
similar triangles, find the height of the courthouse.​

Answers

I need this answer too please help us out it’s important !

The diameter of a circle is 6 yards. What is the circle's circumference?

Answers

Step-by-step explanation:

formula for circumference of the cricle = 2πr

π = 3.14

r= radius of the circle

diameter of the circle = 6

radius of the circle = d/2 = 6/2= 3

circumference = 2πr

= 2×3.14×3

= 18.84

circumference of the given circle is 18.84 yards.

Which of the following expressions are equivalent to 1/-7 • -6/5

Answers

I think it’s none of the above. Option C

Determine whether each statement is true or false, HELP

Answers

1. false
2. true
3. false
4. true
5. false
hope this helps:)

Daniela works as a private chef in the city and is paid $30 per hour. She kept a record of her weekly tips: $200, $190, $330, and $250. If she works 40 hours per week, what is her average weekly earnings?

Answers

Answer:

2170

Step-by-step explanation:

200 + 190 + 330 + 250 = 970

30 x 40 = 1200

1200 + 970 = 2170

7 + r = -5 solve for r

Answers

Answer:

r=negative12

Step-by-step explanation:

Answer:

r=-12

Step-by-step explanation:

subtract 7 from both sides of the equation to get r alone. Then, combine like terms.

The points (6, g) and (5, 5) fall on a line with a slope of 3. What is the value of g?

Answers

Answer:

g=8

Step-by-step explanation:

First, let's find the equation of the line.

Using point-slope form, which is y-y1=m(x-x1)

we can substitute the given slope (3) and the point (5,5) into the equation

y-5=3(x-5)

do distributive property

y-5=3x-15

add 5 to both sides

y=3x-10

the equation of the line is y=3x-10

since the point (6,g) will fall on the line, we can put it into the equation to find y

y=3(6)-10

y=18-10

y=8

y, or g=8

hope this helps!

If GEOM is a square, find m∠GQE.

Answers

Answer:

i think it is 180

Step-by-step explanation:

because 180 is the total degrees of a triangle

The measure of the angle ∠GQE will be 90°. Then the correct option is C.

What is the quadrilateral?

The definition of a quadrilateral is a planar form with four sides, four vertices, and four angles. Concave and convex are the two primary kinds.

If all the sides of the quadrilateral are identical, then the quadrilateral will be a square.

In the square, each angle will be a right angle. And the diagonals of the square intersect at a right angle.

Thus, the measure of the angle ∠GQE will be 90°. Then the correct option is C.

More about the quadrilateral link is given below.

https://brainly.com/question/29934291

#SPJ3

18= 3 | 4x − 10 |
please help

Answers

Answer:

19

Step-by-step explanation:

multiply then add

A persons weekly pay directly proportional to the number of hours worked on Spee is $123.00 for 20 hours of work. Find amount of pay for 31 hours of work.

Answers

Answer:

$190.65

Step-by-step explanation:

123.00/20=6.15 per hour

6.15x31hours worked = $190.65

a father is 25 years older than his son the sum of their ages is 53 find their ages

Answers

Father is 39 years and the son is 14 years. Because 53-25=28 then 28/2=14. Then to add it all up 14+25=39+14=53.

Patty has $75. Latisha has L dollars. Patty has $20
more than 3 times the amount of money that Latisha
has. Which equation represents the situation?

Answers

Answer:

5

Step-by-step explanation:

5 + 20 = 25

25 x 3 = 75

Hope this helps!

Help me out pleaseeee

Answers

Answer:

2/3

Step-by-step explanation:

Slope= Rise over run= rise/run= Change in y/Change in x, so:

You have to go up 2, and over 3.

2/3

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