MATHEMATICS HIGH SCHOOL

HELP PLEASE I WILL GIVE BRAINLY TO CORRECT ANSWER PLS.2 The graphs of y = 3x + 7x – 4 and y + 2x = 10 intersect at the points A and B.
Find the coordinates of A and B.
You must show all your working and give your answers correct to two decimal places.

Answers

Answer 1
Answer:

Answer:

Check the text of the exercise, there is something wrong

Step-by-step explanation:

y=10x-4

y=-2x+10

These are two stright lines, they meet in one point only, P(7/6, 23/3)

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Find the following when a = -1, b = 2, c = -1/4 (4b - 3)/(2a) -1
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Please I need help asap.
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an edge of cube a is 8 inches and an edge of cube b is 5 inches to the nearest tenth how many times greater is the volume of cube a than cube b

The slope-intercept form of the equation of a line that passes through point (–2, –13) is y = 5x – 3. What is the point-slope form of the equation for this line?y – 13 = 5(x – 2)
y + 13 = 5(x + 2)
y – 2 = 5(x – 13)
y + 2 = 5(x + 13)

Answers

The point-slope form in general is y-y_1=m(x-x_1)

With the coordinate (-2,-13) being (x_1,y_1), and the slope m, is 5, from y = 5x – 3, 

y-y_1=m(x-x_1)
y-(-13)=5(x-(-2))
y+13=5(x+2)

Answer:

its b :)

Step-by-step explanation:

i aint ever seen two pretty best friends  

Which of the following phases translate to the expression y+7

Answers

Answer:

what are the phrases to choose from?

Step-by-step explanation:

2⁰+2¹+2²+2³+...+2²⁰¹⁹

Answers

What’s the question?

Any ideas on how to find the value of 'x' on either 13 or 16? Anything helps!

Answers

(x+5)/4=1/2
first get rid of the fraction
multiply both sides by 4
x+5=2
subtract 5
x=-3

(2x+1)/(4x-1)=2/3
get rid of the fractions,
multiply both sdies by (4x-1)(3)
(2x+1)(3)=(2)(4x-1)
distribute
6x+3=8x-2
subtract 6x form both sdies
3=2x-2
add 2
5=2x
divide by 2
5/2=x

For the two weeks period, Jan earned $150 less than twice Tom's earnings. Together Jan and Tom earned $1380. How much did Tom earn?

Answers

The earnings of Tom is $510.

What is a word problem?

A word problem is a verbal description of a problem situation. It consists of few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.

For the given situation,

Let the earnings of Jan be x and

Let the earnings of Tom be y.

Jan earned $150 less than twice Tom's earnings,

⇒ x=2y-150 ------ (1)

Together Jan and Tom earned $1380,

⇒ x+y=1380 ------- (2)

Now substitute equation 1 in 2,

⇒ 2y-150+y=1380

⇒ 3y=1380+150

⇒ 3y=1530

⇒ y=(1530)/(3)

⇒ y=510

Hence we can conclude that the earnings of Tom is $510.

Learn more about word problems here

brainly.com/question/20594903

#SPJ2
2x+150=1380
Subtract 150 to each side
2x=1230
Divide both sides by 2x
X=615
Tom earned $615

Using the completing-the-square method, find the vertex of the function f(x) = 5x2 + 10x + 8 and indicate whether it is a minimum or a maximum and at what point.a. maximum (1,8)
b. minimum (1,8)
c. maximum (-1,3)
d. minimum (-1,3)

Answers

Answer : d. minimum (-1,3)

f(x) = 5x^2 + 10x + 8

The vertex form of quadratic function is

f(x) = a(x-h)^2 + k, where (h,k) is the vertex

To get vertex form we apply completing the square method

To apply completing the square method , there should be only x^2

So we factor out 5 from from first two terms

f(x) = 5(x^2 + 2x) + 8

Now we take the number before x (coefficient of x) and divide by 2

(2)/(2) =1

Now square it

(1)^2 =1

Add and subtract 1 inside the parenthesis

f(x) = 5(x^2 + 2x + 1 - 1) + 8

Now we take out -1 by multiplying 5

f(x) = 5(x^2 + 2x + 1) -5 + 8

f(x) = 5(x^2 + 2x + 1) + 3

Now we factor x^2 +2x+1 as (x+1)(x+1)

f(x) = 5(x+1)(x+1) + 3

f(x) = 5(x+1)^2 + 3

h=-1  and k=3

So vertex is (-1,3)

When the value of 'a' is negative , then it is a maximum

When the value of 'a' is positive , then it is a minimum

f(x) = 5x^2 + 10x + 8 is in the form of f(x) = ax^2 + bx + c

The value of a is 5

5 is positive so it is a minimum

f(x) is minimum at point (-1,3)
The vertex form is a(x-h)²+k, where (h,k) are the coordinates of the vertex.

f(x)= \n 5x^2+10x+8= \n5(x^2+2x)+8= \n5((x^2+2x+1)-1)+8= \n5((x+1)^2-1)+8= \n5(x+1)^2-5+8= \n5(x+1)^2+3

The coordinates of the vertex are (-1,3).

The coefficient of x² is positive, so the parabola opens upwards and the vertex is the minimum of the function.

The answer is d.
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