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3 years ago

5.) Juan answered

Mathematics

1 answer:

vlada-n [284]3 years ago

5 0

Answer:

Step-by-step explanation:

Depends on how many problems his quiz contains and how many problems he answered correctly.

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I Believe It Is All.

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4 years ago

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Which of the following is another way to express the equation 8 - (-) = 43?

Olin [163]

Question:

Which of the following is another way to express the equation 8 - (-d) = 43?

A.8-d=43

B.-d+8=43

C.-8+d=43

D.8+d=43

Answer:

8 + d = 43 is another way to express the given equation

Solution:

Consider the given equation

$8 - (-d) = 43$

We have to find the another way to express the above equation

We know that,

We we multiply negative sign number by another negative sign number, then the result is positive sign number

Therefore from given,

$-(-d) = -1 \times -d = d$

Thus the given equation becomes,

8 + d = 43

Thus option D is correct

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4 years ago

a surveyor measures the distance to the two landmarks as shown in the diagram what is the distance d. between the landmarks

Inessa [10]

<h3>The distance between two landmarks is 123 meters</h3>

Solution:

We have to find the distance between two landmarks

Use the law of cosines

The third side of a triangle can be found when we know two sides and the angle between them

$c^2 = a^2 + b^2 - 2ab\ cos c$

Here, angle between 90 meters and 130 meters is 65 degrees

From figure,

a = 90

b = 130

c = d

Therefore,

$d^2 = 90^2 + 130^2 - 2(90)(130)\ cos 65\\\\d^2 = 8100 + 16900 - 23400\ cos\ 65\\\\d^2 = 25000 - 23400 \times 0.4226\\\\d^2 = 25000 - 9889.267\\\\d^2 = 15110.73\\\\d = 122.92\\\\d \approx 123$

Thus, the distance between two landmarks is 123 meters

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4 years ago

Marybeth opened her bank account with $125. She spends $10 every 3 weeks. Write an equation that represents the balance of her a

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Answer:if she spends $10 dollars every 3 weeks it will take her 45 weeks to have her only $5 dollars left in her bank account

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4 years ago

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Divide. Write your answer as a fraction in simplest form. −7/10÷ 2/5= help

WARRIOR [948]

Answer:

- $\frac{7}{4}$

Step-by-step explanation:

Given

- $\frac{7}{10}$ ÷ $\frac{2}{5}$

Leave the first fraction

Change division to multiplication

Turn the second fraction upside down

= - $\frac{7}{10}$ × $\frac{5}{2}$ ← cancel 5 and 10 by 5

= - $\frac{7}{2}$ × $\frac{1}{2}$

= - $\frac{7(1)}{2(2)}$

= - $\frac{7}{4}$

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3 years ago