3 years ago

What is the missing value in the proportion 4/5 = x/30

Mathematics

2 answers:

Molodets [167]3 years ago

7 0

Answer:

Step-by-step explanation:

From 5 to 30 you multiply by 6. 4 times 6 is 24!

mariarad [96]3 years ago

3 0

Answer:

The answer is x=24

Step-by-step explanation:

By cross multiplying 4/5 and x/30, we get 5x= 120. Divide 120 by 5, and you get 24.

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What is the solution to the inequality 7<=-3x-4

kipiarov [429]

Answer:

The nearest option is -3 (negative 3)

So, Option B is correct.

Step-by-step explanation:

We need to solve the inequality $7 \leq -3x-4$

Solving:

Step 1: Switching sides of inequality and reversing the inequality

$-3x-4\geq 7$

Step 2: Adding 4 on both sides

$-3x-4+4\geq 7+4\\-3x\geq 11$

Step 3: Dividing both sides by -3 and reversing the inequality

$\frac{-3x}{-3}\leq \frac{11}{-3} \\x\leq -3.6\\$

The nearest option is -3 (negative 3)

So, Option B is correct.

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3 years ago

Evaluate ƒ(x) = –4x – 5 for x = –1.

11111nata11111 [884]

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3 years ago

Two numbers in a ratio 5:4 . Their sun is 720.find the bigger number.show your reasoning

alina1380 [7]

5x + 4x = 720
9x = 720 (divide by 9)
X= 80
In order to get the bigger ratio, which is 5, you would substitute x for 80. (I'm bad at explaining)
Work:
5(80)= 400

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3 years ago

Angle Measurements

Naddik [55]

Answer:

X = 11

Complementary angles

Step-by-step explanation:

Complementary angles are when two angles add up to 90 degrees.

3x + 10 + 47 = 90

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x = 11

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harkovskaia [24]

Answer:

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