What addition doubles fact can help you find 4 + 3? Explain how you know?

The answer choices are A) 60 B)108 C)72 D)54

madreJ [45]

If you subtract 180 from <1 which is 6 then subtract again to <12 your should get B

7 0

3 years ago

5. A quarter is tossed in the air 300 times.

tankabanditka [31]

Answer:

C

Step-by-step explanation:

The probability of getting heads or tails is 50%.

300*50% = 150

3 0

3 years ago

Read 2 more answers

50 + 2x = 100 What is x?

max2010maxim [7]

Answer:

x = 25

Step-by-step explanation:

50 + 2x = 100

=> 2x = 50

=> x = 25

Hoped this helped.

4 0

3 years ago

Read 2 more answers

PLEASE HELP ME WHOEVER HELPS I WILL MARK BRAINLEST :)

julsineya [31]

Remember the shortcut way for graphing quadratic equations

A quadratic function has graph as parabola
Hence on both sides of vertex the parabola is symmetric and axis of symmetry is vertex x values .
y on both sides for -x and +x is same

#1

y=2(x-3)²-1

Vertex

(h,k)=(3,-1)

As a is positive parabola facing upwards

Find y for same x distance from vertex

I took 3-1=2 and 3+1=4

f(2)=2(2-3)²-1=2(-1)²-1=2-1=1
f(4)=2(4-3)²-1=1

Now plot vertex and these two points (2,1) and (4,1) on graph then draw a parabola by freehand

#2

y=(x-2)(x+4)
y=x²+4x-2x-8
y=x²+2x-8

Convert to vertex form

y=x²+2x+1-9
y=(x+1)²-9

Vertex at (-1,-9)

Same take two equidistant x values

Let's take -1-1=-2 and -1+1 =0

f(-2)=(-2+1)²-9=1-9=-8
f(0)=(1)²-9=-8

Put (-1,-9),(-2,-8),(0,-8) on graph and draw a freehand parabola

#3.

Yes it can be verified by finding the coordinate theoretically on putting them on function then can be verified through putting them on graph whether they matches or not

8 0

2 years ago

How many solutions does these equations have? One, infinite or no solutions?

s2008m [1.1K]

Answer:

1. 7(y + 3) = 5y+8: one solution

2. 10 + 6x= 2(5+3x): infinite solutions

3. 3x + 5 - x=2x + 7: no solutions

4. 4x - 4 = 2x + 8: one solution.

Explanation:

1. 7(y+3)=5y+8

a) Distributive property of multiplication over addtion:

7y + 21 = 5y + 8

b) Subtraction property of equalities:

7y - 5y = 8 - 21

c) Combine like terms:

2y = - 13

d) Division property of division:

y = - 13/2

e) Conclusion: the equation has one solution.

2. 10 + 6x = 2(5+3x)

a) Distributive property of multiplication over addition:

10 + 6x = 10 + 6x

b) Subtraction property of equality:

6x - 6x = 10 - 10

c) Simplify (combine like terms)

0 = 0

That is an identity, i.e. that is always true, no matter the value of x.

d) Conclusion: the equation has infinite solutions.

3. 3x + 5 - x = 2x + 7

a) Combine like terms:

2x + 5 = 2x + 7

b) Subtraction property of equalities:

2x - 2x = 7 - 5

c) Combine like terms (simplify)

0 = 2

That is always false, no matter the values of x.

d) Conclusion: the equation does not have any solutions.

4. 4x - 4 = 2x + 8

a) Subtraction property of equality

4x - 2x - 4 = 2x - 2x + 8

b) Combine like terms

2x - 4 = 8

c) Addtiion property of equalities:

2x = 8 + 4

d) Combine like terms (simplify)

2x = 12

e) Division property of equalities:

x = 6

f) Conclusion: the equation has one solution

5 0

4 years ago