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4 years ago

What is the value of x?

Mathematics

2 answers:

andreev551 [17]4 years ago

8 0

Formula

The area of any triangle is

A = 1/2 * b * h

Givens

A = 10

b = 4

h = x + 3

Sub and solve

10 = 1/2 * 4 * (x + 3) Take 1/2 of 4

10 = 2 * (x + 3) Divide by 2

10/2 = 2( x + 3) / 2

5 = x + 3 Subtract 3 from both sides.

5 - 3 = x + 3 - 3

2 = x <<<<<<<<<<<<<< answer.

asambeis [7]4 years ago

4 0

A = 1/2 b h where A = 10 b = 4 and h = x + 3

h = 2A/b

h = 2*10 / 4

h = 20/4

h = 5

h = x + 3

5 = x + 3

x = 2

Answer

x = 2

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A hollow cubical box is 0.30 m on an edge. this box is floating in a lake with one-third of its height beneath the surface. the

sasho [114]

Given hollow cubical box of side 0.30 m=3 dM
volume V=3^3=27 dm^3 = 27 L

Weight of box
= weight of (fresh) water (1 kg/L) displaced
= V/3 = 9 L of water = 9 kg

When water is filled so that the total weight of water equals the weight of volume of box, the top rim of the box will be at water level.

Remaining volume = 27-9=18L
height of 18L of water when water rushes in
= 18/(3^2) = 2 dm (=0.2m)

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3 years ago

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Korolek [52]

Answer:

The rectangle ABCD and the congruent angles are shown in the diagram below.

We know that T is a midpoint.

That gives us the length of TD = length of TB, also TA = TC

Look for triangle ATD and BTC, we have so far that:

TD = TB and TA = TC

∠DAT = ∠BCT (properties of alternate angles)

∠ATD = ∠BTC (properties of opposite angles)

By the postulate SAS (Side Angle Side) we can deduce that AD = BC

Answer: TB = TD (Fourth option)

Step-by-step explanation:

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3 years ago

I cant resolve this equation : 2x = -2x + 8, can you help me please

chubhunter [2.5K]

Answer:

x = 2

Step-by-step explanation:

OK so lets do it together.

2x = -2x + 8

Subtract 8 from both sides

2x - 8 = -2x

Add 2x to both sides

4x - 8 = 0

Add 8 to both sides

4x = 8

Divide each side by 4

x = 2

Check:

4 = -4 + 8

4 = 4

correct

If my answer is incorrect, pls correct me!

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3 years ago

What is the value of d? −5.5(d−2)=−12.1

Sveta_85 [38]

answer: $d = 4.2$

explanation:

$-5.5(d-2)=-12.1$ | distribute the -5.5 into the parentheses

$-5.5d + 11 = -12.1$ | subtract 11 and move it over to -12.1

$-5.5d = -23.1$ | divide by -5.5

$d = 4.2$ | final answer

hope this helps! ❤ from peachimin

8 0

3 years ago

Read 2 more answers

A coin bank for donations for the protection of the reef contained Php 1,570. There were twice as many Php 5-coins as

kvasek [131]

Answer:

There are 144 Php 5-coins, 72 Php 10-coins and 130 Php-1 coins

Step-by-step explanation:

The amount of the coins in the coin bank = Php 1,570

The number of Php 5-coins = 2 × The number of Php 10-coins

The number of Php 5 coins = The number of Php 1-coins + 14

Let 'x' represent the number of Php-5 coins, let 'y' represent the number of Php 10-coins, and let 'z' represent the number of Php 1-coins, we get;

x = 2 × y...(1)

x = z + 14...(2)

5·x + 10·y + z = 1,570...(3)

From equation (1) equation (2), and equation three, we have;

y = x/2

z = x - 14

5·x + 10·x/2 + x - 14 = 1,570

11·x - 14 = 1,570

x = (1,570 + 14)/11 = 144

The number of Php 5-coins, x = 144

y = x/2

∴ y = 144/2 = 72

The number of Php 10-coins, y = 72

z = x - 14

∴ z = 144 - 14 = 130

The number of Php 1-coins, z = 130

6 0

3 years ago