4 years ago

Solve by substitution

Mathematics

1 answer:

Mademuasel [1]4 years ago

4 0

Answer:

That is way too much math for me.

Step-by-step explanation:

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A recipe calls for 4 cups of pecans for every 5 cups of walnuts. How many cups of pecans should be added to 8 cups of walnuts?

My name is Ann [436]

4 cups of pecans = 5 cups of walnuts
x cups of pecans = 8 cups of walnuts

CROSS MULTIPLY
4*8 =5x
5x = 32

DIVIDE BOTH SIDES BY 5

5x/5 = 32/5
x=6.4

Therefore, 6.4 cups of pecans would be added to 8 cups of walnuts

8 0

2 years ago

Tom had 114 baseball cards. He kept 10 and shared the rest evenly among his 8 friends. How many baseball cards did each friend g

SVETLANKA909090 [29]

104/8=13
each friend gets 13 cards

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3 years ago

Read 2 more answers

Algebra ,, will mark brainliest!!

Viktor [21]

Answer:

Step-by-step explanation:

(1 1/2,-2)

solve for x and get 1 1/2

solve for y and get -2

7 0

2 years ago

Please I need help with this question!

likoan [24]

Answer:

I. 60%

II. 75.4 kg

Step-by-step explanation:

We will use the z-scores and the standard normal distribution to answer this questions.

We have a normal distribution with mean 69 kg and variance 25 kg^2 (therefore, standard deviation of 5 kg).

I. What percentage of adult male in Boston weigh more than 72 kg?

We calculate the z-score for 72 kg and then calculate the associated probability:

$z=\dfrac{X-\mu}{\sigma}=\dfrac{72-69}{5}=\dfrac{3}{5}=0.6\\\\\\P(X>72)=P(z>0.6)=0.274$

II. What must an adult male weigh in order to be among the heaviest 10% of the population?

We have to calculate tha z-score that satisfies:

$P(z>z^*)=0.1$

This happens for z=1.28 (see attachment).

Then, we can calculate the weight using this transformation:

$X=\mu+z^*\cdot\sigma=69+1.28\cdot 5=69+6.4=75.4$

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3 years ago

Solve for x for the following question

anastassius [24]

X equals 3 because i know 2 to the fifth power is 32,so 3x-4=5so 3*3=9

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3 years ago