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3 years ago

-2x-5 = 19 I need help with this

Mathematics

2 answers:

Nezavi [6.7K]3 years ago

7 0

Answer:

x=-12

Step-by-step explanation:

-2x-5=19

+5 to both sides

-2x=24

÷-2 to both sides and you get -12

andre [41]3 years ago

3 0

Answer:

-12

Step-by-step explanation:

First you add five to the 19 and get 24 and then you divide -2x by 24 and you get -12

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I need help for 7 problems

oksano4ka [1.4K]

Answer:

$180 {m}^{2}$

Step-by-step explanation:

The area of a trapezoid is given by:

$Area = \frac{1}{2} (sum \: of \: bases) \times h$

From the diagram, the bases are 17m 23m, and the the height is 12m.

We substitute the values into the formula to get:

$Area = \frac{1}{2} (17 + 13) \times 12$

$Area = \frac{1}{2} \times 30 \times 12$

$Area = 6 \times 30$

This implies that

$Area = 180 {m}^{2}$

4 0

3 years ago

Jack has a fair coin. He tosses the coin four times. What is the probability that Jack gets heads, then heads, then tails, and t

Tcecarenko [31]

As you have a 1/2 chance of getting what you want when you flip the coin, to get heads, heads, tails, tails will be 1/2 x 1/2 x 1/2 x 1/2. Working our way down the line, 1/2 x 1/2 = 1/4, 1/4 x 1/2 = 1/8, and 1/8 x 1/2 = 1/16. Jack will get heads, heads, tails, tails 1/16 of the time.

7 0

3 years ago

Read 2 more answers

UseU={1,2,3,4,5,6,7,8,9,10},A={1,3,4},B={4,7,8,9},and C={2,6,10}to find the given set AUB

salantis [7]

Answer:

A ∪ B = { 1,3,4,7,8,9}

Step-by-step explanation:

U = {1,2,3,4,5,6,7,8,9,10}

A={1,3,4} B={4,7,8,9} and C={2,6,10}

UNION OF SETS:

Union of two sets is defined as the set which has all the elements from both the sets.

Also, REPETITION OF THE ELEMENTS in NOT allowed in union of sets.

Now, here:

A={1,3,4} B={4,7,8,9}

So, A ∪ B = { 1,3,4,7,8,9} ( element 4 is written only ONCE here)

3 0

3 years ago

*click image*

nirvana33 [79]

Answer:

142

Step-by-step explanation:

$\frac{x+18}{5}=32$

Multiplying both sides by 5, you get:

x+18=160

Now, you can subtract 18 from both sides to get:

x=142

Hope this helps! Comment if this wasn't clear enough, or you need more explanation.

3 0

4 years ago

Read 2 more answers

The length of a rectangle is 5 centimeters more than the width. The area of the rectangle is 36 centimeters. What is the length?

UNO [17]

We can represent the width as x and the length as x+5. Then we can make the area formula A=(x)*(x+5), plug in 36 for A, and solve for x

36=x^2+5x (distribute)
0=x^2+5x-36
0=(x+9)(x-4)
So x=-9 and 4 but dimensions can't be negative so x=4

So if the width is 4, then the length is 9 (4+5)

Hope this helps :)

3 0

3 years ago

Read 2 more answers