3 years ago

Someone please help me I’m doing a test-

Mathematics

1 answer:

tamaranim1 [39]3 years ago

5 0

Answer:

Step-by-step explanation:

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7x – 5 – 3x = 7 – 6x solve for x

PolarNik [594]

Step-by-step explanation:

7x - 3x=5 + 7

we will plus --

10x =12

x=12÷10 or 10 /12

x=12.2

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2 years ago

how do you know when the solution of equations is a precise answer and when it is an approximate answer?

Nadya [2.5K]

Answer:

an answer is precise when it is an exact number like 10, 2, or 123.

An answer is approximate when the decimal numbers are so close that could round it, and the rounded number would be equivalent to the original number. ex: 10.98 = 11

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3 years ago

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A few of them are similar because of the sizes.

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3 years ago

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In △ABC, m∠A=19°, a=13, and b=14. Find c to the nearest tenth.

34kurt

We know that
Applying the law of sines

step 1
Find the value of angle B
a=13
b=14
A=19°
so

$\frac{a}{sin A} = \frac{b}{sin B} \\ a*sin B=b*sin A \\ sin B= \frac{b}{a}*sin A \\ sin B= \frac{14}{13} *sin 19 \\ sin B=0.3506 \\ B=arc sin(0.3506) \\ B=20.5$ °

step 2
with angle A and angle B find the angle C
A+B+C=180-----> solve for C
C=180-(A+B)------> C=180-(19+20.5)-----> C=140.5°

step 3
$\frac{a}{sin A} = \frac{c}{sin C} \\ a*sin C=c*sin A \\ c=a* \frac{sin C}{sin A} \\ c=13* \frac{sin 140.5}{sin 19} \\ c=25.4$

the answer is
the value of c is 25.4

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3 years ago

Brooklyn and Nicole are both driving along the same highway in two different cars to a stadium in a distant city. At noon, Brook

3241004551 [841]

Answer: B= -54t +367

N=-50t + 347

so in total would be 5 HOURS

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3 years ago