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3 years ago

Help me plssssssssssssssssssssssssssssss

Mathematics

1 answer:

Naddika [18.5K]3 years ago

5 0

Answer: See explanation (btw, the answer is always in bold letters)

Step-by-step explanation:

1.) 1 gallon for $1.99

1/2 gallon for $0.98

1 gallon would be 0.98 × 2 = <em>1.96</em>

2 gallons for $3.98

1 gallon would be 3.98 ÷ 2 = 1.99

2.) 621 ÷ 4 = 155.25

He pays $155.25 each payment!

3.) V = s³

s = 3

V = 3³

3 × 3 × 3 = 27

V = 27 m³

4.) This is a rectangle; the area of a rectangle is l × b.

L = 6.9

l × b = a

6.9b = 28.29

Divide both sides by 6.9

b = 4.1

The missing length is 4.1 m

5.) False

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Which equations have the same value of x as 2/3(6x+12)=-24? Check all that apply.1. 4x+8=24 2. 9x+18=-24 3. 4x+12=-24 4. 18x+36/

Neko [114]

Answer: Hence, Option (6) and (8) are correct as their value is also "-8".

Step-by-step explanation:

Since we have given that

$\frac{2}{3}(6x+12)=-24$

First we need to solve to get the value of 'x' :

$\frac{2}{3}(6x+12)=-24\\\\6x+12=\frac{3}{2}\times (-24)\\\\6x+12=3\times (-12)\\\\6x+12=-36\\\\6x=-36-12\\\\6x=-48\\\\x=\frac{-48}{6}\\\\x=-8$

Therefore, x=-8

Now, we will check all the options :

1) 4x+8=24

$4x+8=24\\\\4x=24-8\\\\4x=16\\\\x=\frac{16}{4}=4$

2) 9x+18=-24

$9x+18=-24\\\\9x=-24-18\\\\9x=-42\\\\x=-4.67$

3) 4x+12=-24

$4x+12=-24\\\\4x=-24-12\\\\4x=-36\\\\x=\frac{-36}{4}=-9$

4) 18x+36/2=-24

$18x+18=-24\\\\18x=-24-18\\\\18x=-42\\\\x=-2.34$

5) 4x=-36

$x=\frac{-36}{4}=-9$

6) 4x=-32

$x=\frac{-32}{4}=-8$

7) x=-9

8) x=-8

Hence, Option (6) and (8) are correct as their value is also "-8".

5 0

4 years ago

Read 2 more answers

Your answer is incorrect.

never [62]

Sorry you didn't state them in fractions

3 0

3 years ago

Read 2 more answers

Express -23 in the form bi where b is a real number TIME SENSITIVE

balu736 [363]

Answer:

Step-by-step explanation:

i stands for square root of negative 1. If you multiple i and square root of 23 you will end up with the original

4 0

3 years ago

5x - y + z = -6<br> 2x + 7y + 3z = 8<br> x + 2z = 6

BabaBlast [244]

Answer:

Step-by-step explanation:

The system of equations given are:

5x - y + z = -6 ------------- i

2x + 7y + 3z = 8 ---------- ii

x + 2z = 6 ----------------- iii

Let us deal with equation i and ii first since they have 3 variables x, y and z;

5x - y + z = -6 x 7

2x + 7y + 3z = 8 x 1

35x - 7y + 7z = -42 ---- iv

2x + 7y + 3z = 8 ---- v

Add equation iv and v;

37x + 10z = -34 ------vi

So, let us solve equation vi and iii:

x + 2z = 6 - ---------- iii x 10

37x + 10z = -34 --- iv x 2

10x + 20z = 60 vi

74x + 20z = -68 vii

Subtract vi - vii;

-64x = 128

x = -2

So; put x = -2 into iii;

x + 2z = 6

-2 + 2z = 6

2z = 6 + 2 = 8

z = 4

Put x = -2 and z = 4 into equation i;

5(-2) - y + 4 = - 6

-10 -y +4 = -6

-6 - y = -6

-y = 0

y = 0

5 0

3 years ago

2300 people came to the ball game last week. This week there was a 13% decrease. How many people attended the football game this

Bess [88]

Answer: 2001 people attended the football game this week.

Step-by-step explanation:

Given: Total people came to the ball game = 2300

Decrease percent = 13%

Number of people attended the football game this week = p-0.13p, where p= number of people attended football last week.

for p= 2300

Number of people attended the football game this week = 2300- 0.13 x (2300)

=2300- 299

= 2001

hence, 2001 people attended the football game this week.

7 0

3 years ago