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4 years ago

Can someone please answer my question please answer it correctly please show work please I need please help

Mathematics

1 answer:

Kryger [21]4 years ago

4 0

Answer:

43. 171 × $4.50 = $769.50

(171 ÷ 9) × 2 = 38

38 × $7.25 = $275.50

$769.50 + $275.50 = $1,045.00

$1,045.00 × 1.04 = $1,086.80

Answer: $1,086.80 for museum tickets and parking

171 + 38 = 209

209 × $6.00 = $1,254.00

$1,086.80 + $1,254.00 = $2,340.80

Answer: $2,340.80 for the total budget

44. Equation: 2a + 10 = 70

2a + 10 = 70 (subtract 10 from each side)

2a = 60 (divide each side by two)

a = 30

Answer: 30 envelopes

45. Inequality: $2.20x + $2.40 < $9.00

$2.20x + $2.40 < $9.00 (subtract $2.40)

$2.20x < $6.60 (divide by $2.20)

x < 3

Answer: x < 3

46. 3 inches in 4 minutes

3 ÷ 4 = 0.75

Answer: 0.75 inch(es) per minute

The only time Landon's elevation changed was from minutes 4 - 10 and 14 - 18. We know that Landon's elevation changed the fastest between minutes 14 - 18, because this occurred over the shortest period of time.

You might be interested in

What number makes the equation _ divided by 8 times 8 equals 225 true

Inga [223]

Answer:

225

Step-by-step explanation:

Let's assume x is the unkown number

so,

$\frac{x}{8}$ * 8=225

both 8's cancel out

and x= 225

so the answer is 225

7 0

3 years ago

Six more than the product of a number and 7 is 4

Scilla [17]

6+7(n)=4

7n+6=4

If they ask you to solve for n you subtract 6 on each side giving you

7n=-2

Divide by 7

n= -2/7

You’re welcome. Let me know if you have questions

6 0

3 years ago

Can somebody help me plz

lina2011 [118]

Answer:

126 people

Step-by-step explanation:

9/5 is the ratio tea/coffee

let x be the one who preferred coffee and x+36 preferred tea

9/5=x+36/x

9x=5x+5(36)

9x-5x=180

4x=180

x=180/4=45

x=45 coffee

x+36=45+36=81

45+81=126

check : 81/45= 9/5

8 0

3 years ago

A chemical company makes two brands of antifreeze. The first brand is 35% anti freeze, and the second brand is 85% pure antifree

coldgirl [10]

Answer: There are 30 gallons of anti freeze of first brand and 120 gallons of anti freeze of second brand.

Step-by-step explanation:

Since we have given that

Percentage of anti freeze in first brand = 35%

Percentage of anti freeze in second brand = 85%

Percentage of anti freeze in mixture = 75%

Total number of gallons of mixture = 150 gallons

We will use " Mixture and Allegation":

First brand Second brand

35% 85%

75%

------------------------------------------------------------------

85%-75% : 75%-35%

10 : 40

1 : 4

So, Number of gallons of anti freeze in first brand is given by

$\dfrac{1}{5}\times 150\\\\=30\ gallons$

Number of gallons of anti freeze in second brand is given by

$\dfrac{4}{5}\times 150\\\\=40\times 3\\\\=120\ gallons$

Hence, there are 30 gallons of anti freeze of first brand and 120 gallons of anti freeze of second brand.

4 0

4 years ago

X^2+20x+11=-8 pls help me I need it now pls help

Rudiy27

Answer:

x = -19 or x = -1

Step-by-step explanation:

$x^2 + 20x + 11 = -8$

We need the quadratic equation in the form

$ax^2 + bx + c = 0$ ,

so we add 8 to both sides.

$x^2 + 20x + 19 = 0$

Now we have an equation of the form x^2 + ax + b = 0.

We need to factor the quadratic equation. To factor it, we need two numbers, p and q, whose product is b and whose sum is a. Then the factoring is (x + p)(x + q).

In our case, b = 19 and a = 20. We need two numbers that multiply to 19 and add to 20. The numbers are 19 and 1. Our p and q are 19 and 1.

(x + 19)(x + 1) = 0

Since a product of two factors equals zero, either one factor equals zero, or the other factor equals zero. We set each factor equal to zero and solve both equations for x.

x + 19 = 0 or x + 1 = 0

x = -19 or x = -1

6 0

4 years ago