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3 years ago

Four expressions are shown below:

Mathematics

2 answers:

Marina86 [1]3 years ago

8 0

Answer:

32x+8 and 4(8x+2)

Step-by-step explanation:

1. simplify the expression 4(8x+2) =32x+8

Serggg [28]3 years ago

3 0

Answer:

Step-by-step explanation:

4(7x + 2 + x) = 4(8x + 2) = 4*8x + 4*2 = 32x + 8

4(7x + 2 + x) are equivalent to 4(8x + 2) and 32x + 8

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Sarah is making strings of beads in the first string she uses 3 beads and she triples the number of beads in each of the next st

xenn [34]

Answer:

She uses 243 beads for the 5th string.

Step-by-step explanation:

In this problem, we can see a pattern. If she triples the number of beads in each of the next strings, that means that we just take the last number and multiply by 3. If the first string uses 3, then:

The second uses 9, 3 * 3 = 9

The third uses 27, 9 * 3 = 27

The fourth uses 81, 27 * 3 = 81

And the 5th uses 243, 81 * 3 = 243.

6 0

3 years ago

Round 34, 588 to the nearest thousand.

saveliy_v [14]

Answer:

I think its 35,000

Step-by-step explanation:

.......... sorry if I'm wrong

7 0

2 years ago

Solve for each system of equations by substitution or elimination.

Tems11 [23]

QUESTION 1

The given system of equations are:

$y=x^2+5x+1$

$y=x^2+2x+1$

We equate the two equations to get:

$x^2+5x+1 =x^2+2x+1$

$x^2 - {x}^{2} + 5x - 2x = 1 - 1$

$3x = 0$

$x = 0$

When x=0,

$y=0^2+2(0)+1 = 1$

The solution is (0,1)

QUESTION 2

The given equations are:

$y=x^2-2x - 1$

and

$y= -x^2-2x-1$

We equate both equations to get:

$x^2-2x - 1 = -x^2-2x-1$

Group similar terms,

$x^2 + {x}^{2} -2x + 2x= -1 + 1$

$2 {x}^{2} = 0$

$x = 0$

We put x=0 into any of the equations to find y.

$y= -0^2-2(0)-1 = - 1$

The solution is (0,-1).

QUESTION 3

The given equations are:

$y=x^2+2x+1$

and

$y=x^2+2x-1$

We equate both equations:

$x^2+2x+1 = x^2+2x-1$

Group similar terms:

$x^2 -x^2+2x = -1 - 1$

$0 = -2$

This is not true.

Hence the system has no solution.

6 0

3 years ago

Help<br> I can’t get this ! Please help

Zielflug [23.3K]

Answer:

$\sqrt{2^5}$

Step-by-step explanation:

First, deal with the product of the two powers of 2 inside the parentheses.

The two factors are powers of 2, so add the exponents.

$(2^{\frac{1}{2}} \cdot 2^{\frac{3}{4}})^2 =$

$= (2^{\frac{1}{2} + \frac{3}{4}})^2$

You need a common denominator, 4, to add the fractions.

$= (2^{\frac{2}{4} + \frac{3}{4}})^2$

$= (2^{\frac{5}{4}})^2$

Now you have an exponent raised to an exponent. Multiply the exponents and reduce the fraction.

$= 2^{\frac{5}{4} \times 2}$

$= 2^{\frac{10}{4}}$

$= 2^{\frac{5}{2}}$

When a fraction is an exponent, the numerator is an exponent and the denominator is the index of the root. A denominator of 2 means a root index of 2 which means square root.

$= \sqrt{2^5}$

8 0

2 years ago

Anyone know this one ?

bezimeni [28]

Answer:

y+2 = -1 ( x+4)

Step-by-step explanation:

The y intercept is 2

The slope is found by using two point

( 0,2) and ( 2,0)

m = (y2-y1)/(x2-1)

= ( 0-2)/(2-0)

= -2/2

= -1

The slope is -1 and the y intercept is 2

Using point slope form

y -y1 = m(x-x1) where m is the slope and ( x1,y1) is a point on the line

y-y1 = -1(x-x1)

It appears that we are using y1 = -2 so x = 4

y - -2 = -1( x -4)

y+2 = -1 ( x+4)

5 0

3 years ago