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Olegator [25]
3 years ago
10

Solve each question mentally -3x = 21

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
6 0
X = -7

3 • 7 = 21

-3 • (-7) = 21

If you multiply two negative numbers you’ll end up with a positive. Thus, - 3 (-7) = 21.
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Find the measures of the numbers angles in each rectangle
Alla [95]

Answer:

m<1 = 60°

m<2 = 30°

m<3 = 90°

Step-by-step explanation:

Recall some properties of Rectangle. Thus:

The four angles of a rectangle are right angles = 90° each.

Opposite sides of a rectangle are also parallel to each other.

With the knowledge of these, we can solve for angles 1, 2, and 3.

Thus:

m<1 = 60° (alternate interior angles are congruent)

m<2 + m<1 = 90° (complementary angles)

m<2 + 60° = 90° (substitution)

m<2 = 30° (substraction property of equality)

m<3 = 90° (angle of a rectangle)

4 0
3 years ago
If h(x)=14x−4, what is h(10)?
nikdorinn [45]

Answer:

h(10)=136

Step-by-step explanation:

h(10)=14*10-4

h(10)=140-4

h(10)=136

5 0
3 years ago
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mixas84 [53]
The answer dragon is 7.6
5 0
3 years ago
Karen is trying to decide which home phone company to use. PhoneHome was a monthly charge of
Sophie [7]

Answer:

0.01x+45>0.05x+10

6 0
3 years ago
Which situation represents a multiplicative relationship? A) Kevin is 8 years older than his brother Sean. B) For every cat at t
Lunna [17]

Answer:

Option B represents a multiplicative relationship.

Step-by-step explanation:

We are required to find the situation that represents a 'multiplicative relationship'.

According to the options, we have,

A) Kevin is 8 years older than his brother Sean.

This gives us the relation that, Kevin's Age = 8 + Sean's Age.

Thus, this is not a multiplicative relationship.

B) For every cat at the pet store, there are 2 dogs.

We get that, for 1 cat, there are two dogs.

So, Number of dogs = 2 × Number of cats.

Thus, this is a multiplicative relationship.

C) A buy one get one free sale on sweaters at the clothing store.

So, during the sale a person can buy 1 + 1 i.e. 2 sweaters.

Thus, this is not a multiplicative relationship.

D) James always keeps $100 more in his savings than his checking account.

This gives us the relation that, Savings balance = 100 + Checking balance

So, this is not a multiplicative relationship.

Hence, option B represents a multiplicative relationship.

6 0
4 years ago
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