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3 years ago

Help help help #1-3 for a brain list award

Mathematics

1 answer:

kogti [31]3 years ago

8 0

1a) 4:2 = 2

4.98 x 2 = $9.96

1b) 3:2 = 1 1/2

4.98 x 3/2 = $7.47

2a) 9:3 = 3

4.80 x 3 = $14.40

2b) 12:3 = 4

4.80 x 4 = $19.20

3a) 6:2 = 3

15.00 x 3 = $45.00

3b) 5:2 = 2 1/2

15.00 x 5/2 = $37.50

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You drive your car for 3 hours at an avarage speed of 130km an .how far did you go?

vladimir1956 [14]

Answer:

d = rt

d = 130(3) = 390 km

Step-by-step explanation:

Hope this helped

5 0

3 years ago

Hey can you please help me posted picture of question

larisa [96]

$(5x - 2)^2 = 15$

Square root both sides:
$5x - 2 = \pm\sqrt{15}$

Add 2 to both sides:
$5x = pm\sqrt{15} + 2$

Divide both sides by 5:
$x = \dfrac{ \pm\sqrt{15} + 2}{5}$

Answers:
$x = \dfrac{ \sqrt{15} + 2}{5} \ or \ \dfrac{ - \sqrt{15} + 2}{5}$

Answer: (B) and (E)

5 0

3 years ago

Read 2 more answers

A company that offers tubing trips down a river rents tubes for a person to use for $20 and “cooler” tubes to carry food and wat

aivan3 [116]

The group rent 11 river rent tubes and 4 cooler tubes.

Step-by-step explanation:

Rent for river rent tube = $20

Rent for cooler tubes = $12.50

Total spent = $270

Total tubes rented = 15

Let,

x be the number of river rent tube.

y be the number of cooler tubes.

According to given statement;

x+y=15 Eqn 1

20x+12.50y=270 Eqn 2

Multiplying Eqn 1 by 20

$20(x+y=15)\\20x+20y=300\ \ \ Eqn\ 3$

Subtracting Eqn 2 from Eqn 3

$(20x+20y)-(20x+12.50y)=300-270\\20x+20y-20x-12.50y=30\\7.50y=30$

Dividing both sides by 7.5

$\frac{7.5y}{7.5}=\frac{30}{7.5}\\y=4$

Putting y=4 in Eqn 1

$x+4=15\\x=15-4\\x=11$

The group rent 11 river rent tubes and 4 cooler tubes.

Keywords: linear equations, subtraction

Learn more about linear equations at:

#LearnwithBrainly

6 0

3 years ago

Someone help need this done right now I’ll mark u brainliest

Ad libitum [116K]

Answer:

89 meters

Step-by-step explanation:

We know it's 9 + "the height of the triangle".

Fortunately, the height of the triangle (let's call it y) can be computed from:

y^2 + 18^2 = 82^2 (Pythagoras theorem).

y^2 = 82^2 - 18^2 = 6724 - 324 = 6400

y = 80 (or y = -80 but it doesn't make sense in geometry).

so x = y + 9 = 89;

3 0

3 years ago

7 less than three times the sum of a number and five

Evgen [1.6K]

<u>Expression Form</u>
(3-7)*n+5
n=Unknown Number

4 0

4 years ago