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GarryVolchara [31]
3 years ago
9

Joe studied math for x minutes, and then studied Spanish for 20 minutes more than he studied math. He did this for 3 days in a r

ow. How long did Joe study for all three days?
Mathematics
1 answer:
never [62]3 years ago
3 0

Answer:

x+20 * 3

Step-by-step explanation:

* represents a multiplication symbol

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Calculate the surface area of the figure below.
makvit [3.9K]

Answer:

Step-by-step explanation:

Surface area is the area times all the faces

6 0
3 years ago
Someone please help and thank you
Harlamova29_29 [7]

Answer:

A. 4 units

Step-by-step explanation:

8 0
3 years ago
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What is the volume of a cylinder, in cubic cm, with a height of 19cm and a base diameter of 6cm? Round to the nearest tenths pla
SVETLANKA909090 [29]

Answer:

It is about 537.2

Step-by-step explanation:

V= π · r^2 · h

V= π · 3^2 · 19

V≈ 537.2

6 0
3 years ago
The time a projectile spends in the air can be modeled by the equation t² -t - 8 = 0, in which t represents the amount of time t
s2008m [1.1K]

Answer:

(t - 4)(t + 2) = 0  

Step-by-step explanation:

The general formula for a quadratic expression is

y = ax² + bx + c

Your expression is

y = t² - 2t - 8 = 0

By comparison, we see that

a = 1; b = -2; c = -8

1. Find two numbers that multiply to give ac and add to give b.

In this case, find two numbers that multiply to give -8 and add to give -2.

It helps to list the factors of  -8.

They are ±1, ±2, ±4, and ±8

After a little trial and error, you should find the numbers -4 and +2.

-4 × 2 = -8, and -4 + 2 = -2)

2. Rewrite the middle term with those numbers

t² -4t + 2t - 8 = 0

3. Factor the first and last pairs of terms separately

t(t - 4) +2(t - 4) = 0

4. Separate the common factor

The common factor is t - 4.

(t - 4)(t + 2) = 0

8 0
3 years ago
Martha bought 3 apples and 6 oranges She had $10 in her wallet which was enough money for the purchase wrie a asystem of equatio
meriva

3x + 6y = 10 is the equation to determine of an apple x and the price of an orange y

<em><u>Solution:</u></em>

Let the price of each apple = $ x

Let the price of each orange = $ y

Martha bought 3 apples and 6 oranges

She had $10 in her wallet which was enough money for the purchase

Thus the equation is:

Total amount = 3 apples(price of each apple) + 6 oranges(price of each orange)

Thus we get,

10 = 3x + 6y\\\\3x + 6y = 10

Thus the equation is found

8 0
3 years ago
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