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
frosja888 [35]
3 years ago
7

Can you please show your workings as I really don’t get this

Mathematics
1 answer:
Pani-rosa [81]3 years ago
3 0

Answer:

The solutions are x = 3, y=10  and x=7, y=30.

Step-by-step explanation:

We use substitution to solve this:

5x - y = 5

y = 5x - 5

Now substitute for y in the  second equation:

2y - x^2 = 11        Replace y by 5x - 5:-

2(5x - 5) - x^2 = 11

10x - 10 - x^2 = 11

x^2 - 10x + 21 = 0

(x - 3)(x - 7) = 0

x = 3 , 7.

Now we find the values of y corresponding to these 2 values of x:

When x = 3 ( using y = 5x - 5):

y = 5*3-5 = 10 and

when x = 7

y = 5*7 - 5 = 30.

You might be interested in
Again I need help, sorry but thank you!
musickatia [10]

Answer:

B)13 pints

Step-by-step explanation:

SO first we find the unit rate

We know that in 90 minutes (hour and a half), the water leaked 6 pints form 2;30 to 4

Now So we can divide to find unit rate

6/90=1/15

So 1 pint for every 15 minutes

And now we want to know the amount it takes from 2:30 to 6:30 which is 4 hours

40 hours is 240 minutes

SO we can divide now

240/15=16

SO 16 pints leaked but the question asked for remaining water in container

So 29-16 is 13

So B)13

3 0
3 years ago
What is 1/3 into decimal form
elena-14-01-66 [18.8K]

Answer: 0.333

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
the ratio of the lenghts of corresponding parts in two smillar solids is 4.1 what is the ratio of their surface areas?
victus00 [196]

Answer:

16:1

Step-by-step explanation:

The ratio of the surface areas of the similar solids is the square of the lengths.

(4:1)²

4²:1²

⇒ 16:1

5 0
3 years ago
PLEASE ANSWER I WILL GIVE BRAINLIEST
Pachacha [2.7K]
We know that since a diameter splits a circle in half, the arcs EF, FG, and GH must add up to 180°, half the measure of a full circle. We can then use the arc addition property to create an equation using the information we know. This equation would be (10x + 8) + 67 + 11x = 180. This can be simplified to x = 5. Therefore, the value of x is 5. Now, we can simply plug in the value of x into the expressions for EF and GH. This means that the measure of EF is 58° and the measure of GH is 55°.

Hope this helps!
3 0
3 years ago
HELP ME PLEASE !!!!!!!!
Vika [28.1K]

Answer:

OPTION A

Step-by-step explanation:

AS IF SHE DOUBLES 1 DIMENSION THE VOLUME BECOMES TWICE.

V=L*B*H

IF L IS DOUBLED ..

THEREFORE,NEW VOLUME=

V2=2L*B*H

V2=2 L*B*H

3 0
3 years ago
Read 2 more answers
Other questions:
  • Determine if the table represents a linear function. If so, find the equation that describes the function below?
    10·1 answer
  • 10(6x-6y)+6(5x+5y)<br> What is the answer
    11·2 answers
  • What linear function equation can be represented by the set of ordered pairs?
    6·1 answer
  • Do these two equations represent the same line 10x+4y=-8 5x+2y=10?
    8·1 answer
  • Ryan orders a pizza with a 20 inch diameter and asks for a cheese stuff crust along its border . The cheese filled border measur
    14·1 answer
  • Line s is drawn in the xy-plane and has an equation
    13·1 answer
  • Find the mean of the following data set: 40, 58, 37, 23, 66, 42, 35, 37, 51, 42, 56, 37, 61, 52.
    15·1 answer
  • How would you find the intercept for the equation y^2=2-3x-2x^2? I need the steps to understand
    10·1 answer
  • Nick is going to roast some marshmallows over a campfire tonight. Nick buys 4 bags of marshmallows. Each bag costs $3. Nick also
    8·2 answers
  • Write a function rule for the table<br><br> hours worked 2,4,6,8 and pay 15,30,45,60
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!