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k0ka [10]
2 years ago
7

Please help‼️‼️ Will mark brainliest

Mathematics
1 answer:
DIA [1.3K]2 years ago
4 0

Answer:

Your answer should be:    a < 8

Step-by-step explanation:

:)

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Joel biked 9 miles east and then 12 miles north. If he
andrey2020 [161]

Answer:

36 miles

Step-by-step explanation:

His entire journey, represented with a diagram, is in the shape of a right angle triangle.

We need to first find the hypotenuse of the triangle, then, add all the sides together:

hyp² = opp² + adj²

hyp² = 9² + 12²

hyp² = 81 + 144 = 225

Find the square root of both sides:

hyp = 15 miles

Therefore, adding the three sides together:

Total distance traveled = 9 + 12 + 15

Total distance traveled = 36 miles

He would ride 36 miles altogether.

5 0
3 years ago
Read 2 more answers
An alloy is composed of nickel, zinc, and copper in a ratio of 7:2:9. How many kilograms of each metal are needed to make 3.6 kg
ivolga24 [154]

Answer:

Nickel= 1.8 kg

Zinc= 0.4 kg

Copper= 1.8 kg

Step-by-step explanation:

7:2:9

7=nickel

2=zinc

9=copper

7+2+9=18

18×2=36

7×2=14 2×2=4 9×2=18

Divide by 10

14÷10=1.4 4÷10=0.4 18÷10=1.8

1.8+1.4+0.4= 3.6

1.8=nickel

0.4=zinc

1.8=copper

8 0
3 years ago
What is 80%of 1,60<br>will mark brainliest​
cluponka [151]

Answer:

Step-by-step explanation:

Converte 80% into a decimal (devide it by 100) = 0.8

Then multiply 0.8 by 1.60 = 1.28 (final result)

4 0
3 years ago
A quadratic equation is shown below:
Valentin [98]
Part A)

The given equation is:

25 x^{2} +10x+1=0

The radicand or discriminant(d) of the equation will be:

d=(10)^{2}-4(25)(1) \\  \\ &#10;d=100-100 \\  \\ &#10;d=0

Since the discriminant is equal to 0, the given quadratic equation has only 1 root. In other words we can say the the given equation is a perfect square. 


Part B)

The given equation is:

4 x^{2} -4x+1=0

We can solve this expression by factorization. Factors of middle term are to be made in such a way that their product equals the product of first and third term and sum is equal to the middle term i.e. product should be 4x² and sum should be -4x.
So the two such terms are -2x and -2x. Using the factors and simplifying the equation by taking common we get:

4 x^{2} -2x-2x+1=0 \\  \\ &#10;2x(2x-1)-1(2x-1)=0 \\  \\ &#10;(2x-1)(2x-1)=0 \\  \\ &#10;(2x-1) ^{2}=0 \\  \\ &#10;2x-1=0  \\  \\ &#10;x= \frac{1}{2}
4 0
3 years ago
Are all trapezoids quadrilaterals
zysi [14]
Yes all trapezoids are quadrilaterals
7 0
3 years ago
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