1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shutvik [7]
3 years ago
7

Please solve all the questions or at least one thanks. Help!

Mathematics
2 answers:
azamat3 years ago
7 0
4. 10 and 5 are the dimensions
Stels [109]3 years ago
7 0
X = apples and y = oranges
3x + 2y = 9.93...multiply by 2
2x + 3y = 9.82...multiply by -3
------------------
6x + 4y = 19.86 (result of multiplying by 2
-6x - 9y = - 29.46 (result of multiplying by -3)
-----------------add
-5y = - 9.6
y = -9.6 / -5
y = 1.92 <==== cost per kg for oranges

2x + 3y = 9.82
2x + 3(1.92) = 9.82
2x + 5.76 = 9.82
2x = 9.82 - 5.76
2x = 4.06
x = 4.06/2
x = 2.03 <== cost per kg per apples
========================
P = 2(L + W)
P = 30
L = 2W

30 = 2(2W + W)
30 = 2(3W)
30 = 6W
30/6 = W
5 = W <=== width is 5 cm

L = 2W
L = 2(5)
L = 10 <== length is 10 cm
=======================
x = first number and y = second number
4x + 3y = 15....multiply by 2
3x - 2y = 7...multiply by 3
-----------------
8x + 6y = 30 (result of multiplying by 2)
9x - 6y = 21 (result of multiplying by 3)
----------------add
17x = 51
x = 51/17
x = 3 <=== first number

3x - 2y = 7
3(3) - 2y = 7
9 - 2y = 7
-2y = 7 - 9
-2y = -2
y = -2/-2
y = 1 <=== second number
======================
x = sons age and y = fathers age
2x + y = 95
x + y = 70...multiply by -1
-------------
2x + y = 95
-x - y = -70 (result of multiplying by -1)
------------add
x = 25 <== sons age

2x + y = 95
2(25) + y = 95
50 + y = 95
y = 95 - 50
y = 45 <=== fathers age
=====================
sorry but I dont know the last one...never was good at those kinds of problems

You might be interested in
Write the equation of the line which passes through (1, 2) and with slope of −1/3
Sati [7]

Answer:

<h2>          x + 3y = 7            </h2>

Step-by-step explanation:

The equation of a line which passes through <em>(x₁, y₁)</em> and with slope of <em>m</em> in point-slope form:

                                y - y₁ = m(x - x₁)

m = -¹/₃

(1, 2)    ⇒   x₁ = 1,  y₁ = 2

Therefore,  the equation of the line which passes through (1, 2) and with slope of −1/3 in point-slope form:

y - 2 = -¹/₃(x - 1)

y - 2 = -¹/₃x + ¹/₃                     {add ¹/₃x to both sides}

¹/₃x + y - 2 = ¹/₃                     {add 2 to both sides}

¹/₃x + y = 2¹/₃                       {multiply both sides by 3}

x + 3y = 7            

8 0
3 years ago
A lamp post with a height of 12 ft casts a shadow of 6 ft. A fire hydrant near it casts a shadow that is 1.5 ft long. How tall i
alex41 [277]

Answer:

3ft

Step-by-step explanation:

We are given that

Height of lamp, h=12ft

Height of shadow, l=6ft

Height of shadow of hydrant, l'=1.5ft

Let height of hydrant=h'

We have to find the height of fire hydrant.

All right triangles are similar

When two triangles are similar then, the ratio of their corresponding sides are equal.

Using the property

\frac{h}{h'}=\frac{l}{l'}

\frac{12}{h'}=\frac{6}{1.5}

h'=\frac{12\times 1.5}{6}

h'=3ft

Hence, the height of fire hydrant=3 ft

3 0
3 years ago
I need help with easy math please
Ivahew [28]

Answer:

1. 16

2. 12

3. 0

4. 17

5. 16

6. 4

7. 32

8. 36

9. 1/18

Step-by-step explanation:

7 0
3 years ago
The formula for the volume of a cone is V=1/3 pi r2h the radius r of the cone may be expressed as
Naily [24]

r = √(3V/πh)

multiply both sides by 3 to eliminate the fraction

πr²h = 3V ( divide both sides by πh )

r² = 3V/ πh ( take the square root of both sides )

r = √(3V/πh)


3 0
3 years ago
Read 2 more answers
Two stores carry a simuler stereo for the same originail price of $573. One store offers a 16% discount and the second store sel
snow_tiger [21]

store number two gives a better discount .

if you go to store one and buy it for 573 with the 16% DISCOUNT, YOU GET 481.32, THEREFORE, STORE TWO IS BETTER(caps lock) also did store two have a discount?


3 0
3 years ago
Other questions:
  • Which graph represents The solution to<br> 6x-2x5X +7
    6·1 answer
  • What is the quotient? Will give brainliest and will report absurd answers.
    8·1 answer
  • Keisha wants to meet for 90 minutes so far she has read 30% of her goal how much longer does she need to read to reach her goal
    10·1 answer
  • From the sum of 5-9i and -4+7i, subtract 14-3i
    8·1 answer
  • Is x^2 = 55 irrational or rational
    14·2 answers
  • Eighty percent of the fans left the competition happy. If 800 fans left the competition unhappy, how many left happy ?
    14·1 answer
  • If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15,
    5·1 answer
  • Easy question solve and get 10 points 3245=3×100__×2×__×__4×__+5
    15·1 answer
  • Given m∥n, find the value of x.
    13·1 answer
  • I need help please and thank you and show work
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!